{"id":557,"date":"2019-05-15T08:52:31","date_gmt":"2019-05-15T00:52:31","guid":{"rendered":"http:\/\/www.hefeiyu.com\/?p=557"},"modified":"2019-05-15T08:52:31","modified_gmt":"2019-05-15T00:52:31","slug":"bdl-fgl_base-%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b2","status":"publish","type":"post","link":"https:\/\/www.hefeiyu.com\/?p=557","title":{"rendered":"BDL-FGL_BASE \u6570\u636e\u7c7b\u578b(2)"},"content":{"rendered":"

BDL\u57fa\u7840\u6570\u636e\u7c7b\u578b
\n\u5b57\u7b26\u7c7b\u578b
\n1\u3001 CHAR\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u56fa\u5b9a\u957f\u5ea6\u5b57\u7b26\u7c7b\u578b
\n2\u3001 VARCHAR\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u53ef\u53d8\u957f\u5ea6\u5b57\u7b26\u7c7b\u578b
\n3\u3001 STRING\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u52a8\u6001\u53ef\u53d8\u957f\u5ea6\u5b57\u7b26\u7c7b\u578b
\n\u65e5\u671f\u65f6\u95f4\u7c7b\u578b
\n4\u3001 DATE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u7b80\u5355\u65e5\u671f\u7c7b\u578b
\n5\u3001 DATETIME\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u9ad8\u7cbe\u5ea6\u65e5\u671f\u65f6\u95f4\u7c7b\u578b
\n6\u3001\u00a0INTERVAL\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u9ad8\u7cbe\u5ea6\u65f6\u95f4\u7c7b\u578b
\n\u6570\u5b57\u7c7b\u578b
\n7\u3001 TINYINT\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1\u5b57\u8282\u6709\u7b26\u53f7\u6574\u578b
\n8\u3001 SMALLINT\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2\u5b57\u8282\u6709\u7b26\u53f7\u6574\u578b
\n9\u3001 INTERGER\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a04\u5b57\u8282\u6709\u7b26\u53f7\u6574\u578b
\n10\u3001BIGINT\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8\u5b57\u8282\u6709\u7b26\u53f7\u6574\u578b
\n11\u3001SMALLFLOAT\u00a0\u00a0\u00a0 4\u5b57\u8282\u6d6e\u70b9\u7c7b\u578b
\n12\u3001FLOAT\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8\u5b57\u8282\u6d6e\u70b9\u7c7b\u578b
\n13\u3001DECIMAL\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u9ad8\u7cbe\u5ea6\u6570\u5b57\u7c7b\u578b
\n14\u3001MONEY\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u9ad8\u7cbe\u5ea6\u8d27\u5e01\u683c\u5f0f\u6570\u5b57\u7c7b\u578b
\n\u4e8c\u8fdb\u5236\u5927\u6570\u636e\u7c7b\u578b
\n15\u3001BYTE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5927\u6570\u636e\u4e8c\u8fdb\u5236\u6570\u636e\u7c7b\u578b
\n16\u3001TEXT\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5927\u6570\u636e\u6587\u672c\u7c7b\u578b
\n\u903b\u8f91\u7c7b\u578b
\n17\u3001BOOLEAN\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5e03\u5c14\u7c7b\u578bTRUE\/FALSE
\nLIKE\u53c2\u7167\u6570\u636e\u5e93\u5b57\u6bb5\u7c7b\u578b
\n18\u3001LIKE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u8868\u793a\u53c2\u7167\u6570\u636e\u5e93\u5bf9\u5e94\u5b57\u6bb5\u7684\u7c7b\u578b
\n(ex\uff1aDEFINE\u00a0 oeb01\u00a0 LIKE oeb_file.oeb01 #\u8868\u793aoeb01\u53d8\u91cf\u7c7b\u578b\u548coeb_file\u8868\u4e2d\u7684oeb01\u5b57\u6bb5\u540c\u7c7b\u578b)
\n——————————————————————————————————————————————
\n1\u3001 CHAR\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u56fa\u5b9a\u957f\u5ea6\u5b57\u7b26\u7c7b\u578b
\n\u8bed\u6cd5 CHAR[(size)]\u00a0 \u6216 CHARACTER[(size)]
\n\u2460CHAR\u4e0eCHARACTER\u662f\u540c\u4e49\u8bcd
\n\u2461size\u6307\u5b9a\u51e0\u4e2a\u5b57\u8282\u957f\u5ea6,\u6700\u592765534\uff1b\u5982\u679c\u4e0d\u6307\u5b9asize\u5219\u9ed8\u8ba4\u4e3a1
\n\u2462\u6ce8\u610f\u540c\u4e00\u4e2a\u5b57\u7b26\u5728\u4e0d\u540c\u7684\u5b57\u7b26\u7f16\u7801\u4e0b\u5360\u7684\u5b57\u7b26\u957f\u5ea6\u662f\u4e0d\u4e00\u6837\u7684
\n\u2463CHAR\u8d4b\u503c\u540e\u5982\u679c\u957f\u5ea6\u4e0d\u8db3size,\u5219\u4ee5\u7a7a\u5b57\u7b26\u8865\u5230\u56fa\u5b9a\u7684\u5b57\u7b26size\u957f\u5ea6\uff0c\u4f46\u662f\u4efb\u4f55\u5b57\u7b26\u6bd4\u8f83\u90fd\u662f\u53bb\u6389\u7a7a\u5b57\u7b26\u540e\u7f00\u540e\u624d\u6bd4\u8f83\u7684(\u5373”abc”=”abc\u00a0\u00a0 “)
\n——————————————————————————————————————————————
\n2\u3001 VARCHAR\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53ef\u53d8\u957f\u5ea6\u5b57\u7b26\u7c7b\u578b
\n\u8bed\u6cd5 CHAR[(size)]\u00a0 \u6216 CHARACTER[(size)]
\n\u2460CHAR\u4e0eCHARACTER\u662f\u540c\u4e49\u8bcd
\n\u2461size\u6307\u5b9a\u51e0\u4e2a\u5b57\u8282\u957f\u5ea6,\u6700\u592765534\uff1b\u5982\u679c\u4e0d\u6307\u5b9asize\u5219\u9ed8\u8ba4\u4e3a1
\n\u2462\u6ce8\u610f\u540c\u4e00\u4e2a\u5b57\u7b26\u5728\u4e0d\u540c\u7684\u5b57\u7b26\u7f16\u7801\u4e0b\u5360\u7684\u5b57\u7b26\u957f\u5ea6\u662f\u4e0d\u4e00\u6837\u7684
\n\u2463CHAR\u8d4b\u503c\u540e\u9762size\u4e0d\u591f,\u5219\u4ee5\u7a7a\u5b57\u7b26\u8865\u5230\u56fa\u5b9a\u7684\u5b57\u7b26size\u957f\u5ea6\uff0c\u4f46\u662f\u4efb\u4f55\u5b57\u7b26\u6bd4\u8f83\u90fd\u662f\u53bb\u6389\u7a7a\u5b57\u7b26\u540e\u7f00\u540e\u624d\u6bd4\u8f83\u7684(“abc”=”abc\u00a0\u00a0 “)<\/p>\n

#CHAR\u00a0&\u00a0VARCHAR\u00a0\u5e94\u7528demo\uff1a \u00a0\u00a0\r\nMAIN\u00a0\u00a0\r\n\u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_char\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0CHAR\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0#\u4e0d\u6307\u5b9a\u957f\u5ea6\u65f6,\u9ed8\u8ba4\u4e3a1\u4e2a\u957f\u5ea6 \u00a0\u00a0\r\n\u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_char20\u00a0\u00a0\u00a0\u00a0\u00a0CHAR(20)\u00a0\u00a0\r\n\u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_varchar\u00a0\u00a0\u00a0\u00a0VARCHAR\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0#\u4e0d\u6307\u5b9a\u957f\u5ea6\u65f6,\u9ed8\u8ba4\u4e3a1\u4e2a\u957f\u5ea6 \u00a0\u00a0\r\n\u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_varchar20\u00a0\u00a0VARCHAR(20)\u00a0\u00a0\r\n\u00a0\u00a0\r\n\u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_char10_A\u00a0\u00a0\u00a0CHAR(10)\u00a0\u00a0\r\n\u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_char10_A_\u00a0\u00a0CHAR(10)\u00a0\u00a0\r\n \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#CHAR\u00a0&\u00a0VARCHAR\u00a0\u8d85\u8fc7\u6307\u5b9a\u7684size\u957f\u5ea6 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0LET\u00a0l_char\u00a0\u00a0\u00a0\u00a0=\u00a0'ABCDEFG'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0LET\u00a0l_varchar\u00a0=\u00a0'ABCDEFG'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[l_char\u00a0\u00a0\u00a0\u00a0=\u00a0',l_char,']'\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0#\u503c\u8d85\u51fasize\u6307\u5b9a\u7684\u957f\u5ea6\u65f6,\u503c\u88ab\u622a\u65ad \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[l_varchar\u00a0=\u00a0',l_varchar,']'\u00a0\u00a0\r\n \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0IF\u00a0l_char\u00a0\u00a0\u00a0\u00a0IS\u00a0NULL\u00a0THEN\u00a0DISPLAY\u00a0'l_char\u00a0\u00a0\u00a0\u00a0IS\u00a0NULL'\u00a0ELSE\u00a0DISPLAY\u00a0'l_char\u00a0\u00a0\u00a0\u00a0NOT\u00a0NULL'\u00a0END\u00a0IF\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0IF\u00a0l_varchar\u00a0IS\u00a0NULL\u00a0THEN\u00a0DISPLAY\u00a0'l_varchar\u00a0IS\u00a0NULL'\u00a0ELSE\u00a0DISPLAY\u00a0'l_varchar\u00a0NOT\u00a0NULL'\u00a0END\u00a0IF\u00a0\u00a0\r\n \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0IF\u00a0l_char\u00a0=\u00a0l_varchar\u00a0THEN\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'l_char\u00a0=\u00a0l_varchar\u00a0:\u00a0equals'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0ELSE\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'l_char\u00a0=\u00a0l_varchar\u00a0:\u00a0not\u00a0equals'\u00a0\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0END\u00a0IF\u00a0\u00a0\r\n \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#CHAR\u8d4b\u503c\u540e\u9762size\u4e0d\u591f,\u5219\u4ee5\u7a7a\u5b57\u7b26\u8865\u5230\u56fa\u5b9a\u7684\u5b57\u7b26size\u957f\u5ea6\uff0c\u4f46\u662f\u4efb\u4f55\u5b57\u7b26\u6bd4\u8f83\u90fd\u662f\u53bb\u6389\u7a7a\u5b57\u7b26\u540e\u7f00\u540e\u624d\u6bd4\u8f83\u7684(\"abc\"=\"abc\u00a0\u00a0\u00a0\") \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0LET\u00a0l_char10_A\u00a0\u00a0=\u00a0'A'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0LET\u00a0l_char10_A_\u00a0=\u00a0'A\u00a0\u00a0\u00a0'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[',l_char10_A\u00a0,']'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[',l_char10_A_,']'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0IF\u00a0l_char10_A\u00a0=\u00a0l_char10_A_\u00a0THEN\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'l_char10_A\u00a0=\u00a0l_char10_A_\u00a0:\u00a0equals'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0ELSE\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'l_char10_A\u00a0=\u00a0l_char10_A_\u00a0:\u00a0not\u00a0equals'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0END\u00a0IF\u00a0\u00a0\r\n \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#CHAR\u00a0&\u00a0VARCHAR\u00a0\u4e0d\u8d4b\u503c,\u76f4\u63a5\u4f7f\u7528\u65f6\u4e3aNULL \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[l_char20\u00a0=\u00a0',l_char20,']'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[l_varchar20\u00a0=\u00a0',l_varchar20,']'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0IF\u00a0l_char20\u00a0\u00a0\u00a0\u00a0IS\u00a0NULL\u00a0THEN\u00a0DISPLAY\u00a0'l_char20\u00a0\u00a0\u00a0\u00a0IS\u00a0NULL'\u00a0ELSE\u00a0DISPLAY\u00a0'l_char20\u00a0\u00a0\u00a0\u00a0NOT\u00a0NULL'\u00a0END\u00a0IF\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0IF\u00a0l_varchar20\u00a0IS\u00a0NULL\u00a0THEN\u00a0DISPLAY\u00a0'l_varchar20\u00a0IS\u00a0NULL'\u00a0ELSE\u00a0DISPLAY\u00a0'l_varchar20\u00a0NOT\u00a0NULL'\u00a0END\u00a0IF\u00a0\u00a0\u00a0\u00a0\u00a0\r\n END\u00a0MAIN\u00a0\u00a0<\/code><\/pre>\n
 <\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n
[l_char\u00a0\u00a0\u00a0\u00a0=\u00a0A]\u00a0\u00a0\r\n[l_varchar\u00a0=\u00a0A]\u00a0\u00a0\r\nl_char\u00a0\u00a0\u00a0\u00a0NOT\u00a0NULL\u00a0\u00a0\r\nl_varchar\u00a0NOT\u00a0NULL\u00a0\u00a0\r\nl_char\u00a0=\u00a0l_varchar\u00a0:\u00a0equals\u00a0\u00a0\r\n[A\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0]\u00a0\u00a0\r\n[A\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0]\u00a0\u00a0\r\nl_char10_A\u00a0=\u00a0l_char10_A_\u00a0:\u00a0equals\u00a0\u00a0\r\n[l_char20\u00a0=\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0]\u00a0\u00a0\r\n [l_varchar20\u00a0=\u00a0\u00a0]\u00a0\u00a0\r\n l_char20\u00a0\u00a0\u00a0\u00a0IS\u00a0NULL\u00a0\u00a0\r\n l_varchar20\u00a0IS\u00a0NULL\u00a0\u00a0\r\n #\u8bf7\u6ce8\u610f\uff0c\u8f93\u51fa\u5360\u4f4d\u7b26\u548c\u503c\u7684\u5173\u7cfb \u00a0\u00a0\r\n #\u6bd4\u5982char(20)\uff1a\u5373\u4f7f\u503c\u4e3aNULL\u65f6\uff0cdisplay\u663e\u793a\u65f6\u4e5f\u8981\u536020\u4e2a\u5b57\u7b26\u7684\u7a7a\u95f4 \u00a0\u00a0\r\n #\u00a0varchar(20)\uff1a\u56e0\u4e3a\u662f\u53ef\u53d8\u957f\u5ea6\u5b57\u7b26\uff0c\u503c\u4e3aNULL\u65f6\uff0cdisplay\u663e\u793a\u65f6\u53601\u4e2a\u5b57\u7b26\u7684\u7a7a\u95f4\u00a0\u00a0<\/code><\/pre>\n
 <\/p>\n
——————————————————————————————————————————————
\n3\u3001 STRING\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5b57\u7b26\u4e32
\n\u8bed\u6cd5 STRING
\nSTRING\u7684\u65b9\u6cd5
\nappend( str\u00a0STRING\u00a0)\u00a0RETURNING STRING\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5728\u539f\u5b57\u7b26\u4e32\u540e\u9762\u6dfb\u52a0str,\u7136\u540e\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32
\nequals( src\u00a0STRING\u00a0) RETURNING INTEGER\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6bd4\u8f83\u539f\u5b57\u7b26\u4e32\u548csrc,\u5185\u5bb9\u662f\u5426\u76f8\u7b49;\u3010\u5b57\u7b26\u4e32\u9996\u5c3e\u7a7a\u767d\u90fd\u5fc5\u987b\u4e00\u6837\u591a\u3011
\n\u5982\u679c\u539f\u5b57\u7b26\u4e32or src\u67091\u4e2a\u5b57\u7b26\u4e32\u4e3aNULL,\u5219\u8fd4\u56deNULL
\nequalsIgnoreCase( src\u00a0STRING\u00a0)\u00a0 RETURNING INTEGER\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u529f\u80fd\u540c\u4e0a,\u4f46\u662f\u5ffd\u7565\u5b57\u7b26\u7684\u5927\u5c0f\u5199
\ngetCharAt( pos\u00a0INTEGER\u00a0) RETURNING STRING\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u8fd4\u56de\u5728\u539f\u5b57\u7b26\u4e32\u4e2d,\u6307\u5b9a\u4f4d\u7f6epos\u7684\u5b57\u7b26;\u3010\u6ce8:\u4f4d\u7f6e\u4ece1\u5f00\u59cb\u8ba1\u6570\u3011
\n\u5982\u679c\u6307\u5b9a\u7684\u4f4d\u7f6epos\u8d85\u51fa\u4e86\u539f\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u5219\u8fd4\u56deNULL
\ngetIndexOf( str\u00a0STRING, spos\u00a0INTEGER\u00a0) RETURNING INTEGER \u8fd4\u56de\u5728\u539f\u5b57\u7b26\u4e32\u4e2d,\u4ece\u6307\u5b9a\u4f4d\u7f6espos\u5f00\u59cb\uff0c\u9996\u6b21\u51fa\u73b0str\u5b57\u7b26\u4e32\u7684\u7d22\u5f15\u4f4d\u7f6e;\u3010\u6ce8:\u4f4d\u7f6e\u4ece1\u5f00\u59cb\u8ba1\u6570\u3011
\n\u5982\u679c\u672a\u68c0\u7d22\u5230,\u5219\u8fd4\u56de0\uff1b\u5982\u679c\u539f\u5b57\u7b26\u4e32\u662fNULL,\u5219\u8fd4\u56de-1
\ngetLength( ) RETURNING INTEGER\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u8fd4\u56de\u539f\u5b57\u7b26\u4e32\u7684\u957f\u5ea6;\u3010\u6ce8:\u9996\u5c3e\u7a7a\u767d\u5b57\u7b26\u4e5f\u8ba1\u6570\u3011
\nsubString( spos\u00a0INTEGER, epos\u00a0INTEGER\u00a0) RETURNING STRING\u00a0\u8fd4\u56de\u5728\u539f\u5b57\u7b26\u4e32\u4e2d,\u4ece\u6307\u5b9a\u4f4d\u7f6espos\u5f00\u59cb\u5230\u6307\u5b9a\u4f4d\u7f6eepos\u7ed3\u675f\u7684\u5b50\u4e32
\n\u5982\u679c\u539f\u5b57\u7b26\u4e32\u662fNULL,\u6216\u8005\u6307\u5b9a\u7684\u4f4d\u7f6e\u8d85\u51fa\u539f\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u5219\u90fd\u8fd4\u56deNULL
\ntoLowerCase( ) RETURNING STRING\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5c06\u539f\u5b57\u7b26\u4e32\u5168\u90e8\u5c0f\u5199,\u00a0\u00a0\u00a0\u00a0 \u5982\u679c\u539f\u5b57\u7b26\u4e32\u662fNULL,\u5219\u8fd4\u56deNULL
\ntoUpperCase( ) RETURNING STRING\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5c06\u539f\u5b57\u7b26\u4e32\u5168\u90e8\u5927\u5199,\u00a0\u00a0\u00a0\u00a0\u00a0\u5982\u679c\u539f\u5b57\u7b26\u4e32\u662fNULL,\u5219\u8fd4\u56deNULL
\ntrim( ) RETURNING STRING\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u53bb\u6389\u539f\u5b57\u7b26\u4e32\u9996\u5c3e\u7a7a\u683c,\u5982\u679c\u539f\u5b57\u7b26\u4e32\u662fNULL,\u5219\u8fd4\u56deNULL
\ntrimLeft( ) RETURNING STRING\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u53bb\u6389\u539f\u5b57\u7b26\u4e32\u9996\u00a0 \u7a7a\u683c,\u5982\u679c\u539f\u5b57\u7b26\u4e32\u662fNULL,\u5219\u8fd4\u56deNULL
\ntrimRight( ) RETURNING STRING\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u53bb\u6389\u539f\u5b57\u7b26\u4e32\u00a0 \u5c3e\u7a7a\u683c,\u5982\u679c\u539f\u5b57\u7b26\u4e32\u662fNULL,\u5219\u8fd4\u56deNULL<\/p>\n
#STRING\u5e94\u7528demo\uff1a \u00a0\u00a0\r\nMAIN\u00a0\u00a0\r\n\u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_string\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0STRING\u00a0\u00a0\r\n\u00a0\u00a0\r\n\u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_blank\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0STRING\u00a0\u00a0\r\n\u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_blankTrim\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0STRING\u00a0\u00a0\r\n\u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_blankCLIPPED\u00a0\u00a0\u00a0STRING\u00a0\u00a0\r\n\u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_varcharCLIPPED\u00a0VARCHAR(20)\u00a0\u00a0\r\n\u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_varcharTrim\u00a0\u00a0\u00a0\u00a0VARCHAR(20)\u00a0\u00a0\r\n \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_stringBlank\u00a0\u00a0\u00a0\u00a0STRING\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DEFINE\u00a0l_stringKnalb\u00a0\u00a0\u00a0\u00a0STRING\u00a0\u00a0\r\n \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#CHAR\u00a0&\u00a0VARCHAR\u00a0&\u00a0STRING\u00a0\u5b57\u7b26\u6bd4\u8f83\u65f6,\u672b\u5c3e\u6709\u7a7a\u767d\u5b57\u7b26\u65f6\u4e00\u5f8b\u5ffd\u7565 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0LET\u00a0l_stringBlank\u00a0=\u00a0'ABCDEFG\u00a0\u00a0\u00a0'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0LET\u00a0l_stringKnalb\u00a0=\u00a0'ABCDEFG'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0IF\u00a0l_stringBlank\u00a0==\u00a0l_stringKnalb\u00a0THEN\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'l_stringBlank\u00a0=\u00a0l_stringKnalb\u00a0:\u00a0equals'\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0#\u221a \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0ELSE\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'l_stringBlank\u00a0=\u00a0l_stringKnalb\u00a0:\u00a0not\u00a0equals'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0END\u00a0IF\u00a0\u00a0\r\n \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#STRING\u00a0\u7a7a\u767d\u5b57\u7b26\u4e32\uff0ctrim()\u00a0\u6216\u00a0CLIPPED\u00a0\u53bb\u6389\u7a7a\u767d\u5b57\u7b26\u540e\uff0c\u4e0d\u662fNULL\u00a0\u800c\u00a0\u662f\u7a7a\u4e32 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0\u00a0##VS## \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#CHAR\u00a0VARCHAR\u00a0\u7a7a\u767d\u5b57\u7b26\u4e32\uff0c\u00a0\u00a0\u00a0\u00a0CLIPPED\u00a0\u53bb\u6389\u7a7a\u767d\u5b57\u7b26\u540e\uff0c\u00a0\u662fNULL\u00a0\u800c\u4e0d\u662f\u7a7a\u4e32 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0LET\u00a0l_blank\u00a0=\u00a0'\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0LET\u00a0l_blankTrim\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0=\u00a0l_blank.trim()\u00a0\u00a0#trim()\u00a0\uff1a\u53ea\u9488\u5bf9string\u5b57\u7b26\u4e32\u624d\u6709\u7684\u65b9\u6cd5\u3002\u00a0trim()\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53bb\u6389\u00a0\u524d\u9762\u53ca\u672b\u5c3e\u7684\u7a7a\u683c \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0LET\u00a0l_blankCLIPPED\u00a0\u00a0\u00a0=\u00a0l_blank\u00a0CLIPPED\u00a0#\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0trimLeft()\u00a0\u4ec5\u53bb\u6389\u00a0\u524d\u9762\u7684\u7a7a\u683c\u00a0 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0LET\u00a0l_varcharTrim\u00a0\u00a0\u00a0\u00a0=\u00a0l_blank.trim()\u00a0\u00a0#\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0trimRight()\u4ec5\u53bb\u6389\u00a0\u672b\u5c3e\u7684\u7a7a\u683c \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0LET\u00a0l_varcharCLIPPED\u00a0=\u00a0l_blank\u00a0CLIPPED\u00a0#CLIPPED\uff1a\u5bf9STRING\u3001CHAR\u3001VARCHAR\u90fd\u53ef\u4ee5\u64cd\u4f5c\uff0c\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4ec5\u53bb\u6389\u00a0\u672b\u5c3e\u7684\u7a7a\u683c \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0IF\u00a0l_blankTrim\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0IS\u00a0NULL\u00a0THEN\u00a0DISPLAY\u00a0'l_blankTrim\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0IS\u00a0NULL'\u00a0ELSE\u00a0DISPLAY\u00a0'l_blankTrim\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0NOT\u00a0NULL'\u00a0END\u00a0IF\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0IF\u00a0l_blankCLIPPED\u00a0\u00a0\u00a0IS\u00a0NULL\u00a0THEN\u00a0DISPLAY\u00a0'l_blankCLIPPED\u00a0\u00a0\u00a0IS\u00a0NULL'\u00a0ELSE\u00a0DISPLAY\u00a0'l_blankCLIPPED\u00a0\u00a0\u00a0NOT\u00a0NULL'\u00a0END\u00a0IF\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0IF\u00a0l_varcharTrim\u00a0\u00a0\u00a0\u00a0IS\u00a0NULL\u00a0THEN\u00a0DISPLAY\u00a0'l_varcharTrim\u00a0\u00a0\u00a0\u00a0IS\u00a0NULL'\u00a0ELSE\u00a0DISPLAY\u00a0'l_varcharTrim\u00a0\u00a0\u00a0\u00a0NOT\u00a0NULL'\u00a0END\u00a0IF\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0IF\u00a0l_varcharCLIPPED\u00a0IS\u00a0NULL\u00a0THEN\u00a0DISPLAY\u00a0'l_varcharCLIPPED\u00a0IS\u00a0NULL'\u00a0ELSE\u00a0DISPLAY\u00a0'l_varcharCLIPPED\u00a0NOT\u00a0NULL'\u00a0END\u00a0IF\u00a0\u00a0\r\n \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#STRING\u7684\u5404\u79cd\u65b9\u6cd5\u5e94\u7528\u793a\u4f8b: \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0LET\u00a0l_string\u00a0=\u00a0'\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0'\u00a0\u00a0\u00a0\u00a0#\u6ce8:\u524d\u97625\u4e2a\u7a7a\u683c,\u540e\u97623\u4e2a\u7a7a\u683c,\u603b\u957f\u5ea6\u4e3a15\u4e2a\u5b57\u7b26 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#append():\u5c3e\u90e8\u6dfb\u52a0 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0append\u00a0[HIJKLMN]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0[:',l_string.append('HIJKLMN'),']'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#equals()\u3001equalsIgnoreCase()\uff1a\u5224\u65ad\u76f8\u7b49 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0equals\u00a0[BCD]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0:',l_string.equals('BCD')\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0#\u00d7 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0equals\u00a0[ABCDEFG]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0:',l_string.equals('ABCDEFG')\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0#\u00d7 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0equals\u00a0[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0]\u00a0\u00a0:',l_string.equals('\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0')\u00a0\u00a0\u00a0#\u00d7\u00a0,\u533a\u522b\u4e8e=\u6bd4\u8f83,=\u53f7\u5b57\u7b26\u540e\u9762\u7684\u7a7a\u767d\u5b57\u7b26\u5ffd\u7565 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0equals\u00a0[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]:',l_string.equals('\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0')\u00a0#\u221a \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0equalsIgnoreCase\u00a0[aBcD]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0:',l_string.equalsIgnoreCase('aBcD')\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0#\u00d7 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0equalsIgnoreCase\u00a0[\u00a0\u00a0\u00a0\u00a0\u00a0ABcDEFg\u00a0\u00a0\u00a0]:',l_string.equalsIgnoreCase('\u00a0\u00a0\u00a0\u00a0\u00a0ABcDEFg\u00a0\u00a0\u00a0')\u00a0#\u221a \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#getLength()\uff1a\u53d6\u5b57\u4e32\u957f\u5ea6 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0length:',l_string.getLength()\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#getCharAt()\uff1a\u7d22\u5f15\u6307\u5b9a\u4f4d\u7f6e\u5b57\u7b26 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0CharAt(\u00a08):[',l_string.getCharAt(8),']'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0CharAt(16):[',l_string.getCharAt(16),']'\u00a0\u00a0\u00a0\u00a0\u00a0#\u7d22\u5f15\u4f4d\u7f6e\u8d85\u51fa\u539f\u5b57\u7b26\u4e32\u957f\u5ea6\u65f6\u8fd4\u56denull \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#getIndexOf()\uff1a\u641c\u7d22\u5b50\u4e32\u7684\u4f4d\u7f6e \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0IndexOf(ABC):',l_string.getIndexOf('ABC',5)\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0IndexOf(AC)\u00a0:',l_string.getIndexOf('AC',1)\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0IndexOf(AC)\u00a0:',l_string.getIndexOf('ABC',16)\u00a0#\u7d22\u5f15\u4f4d\u7f6e\u8d85\u51fa\u539f\u5b57\u7b26\u4e32\u957f\u5ea6\u65f6\u8fd4\u56denull \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#toLowerCase()\u3001DOWNSHIFT()\uff1a\u5168\u90e8\u8f6c\u5c0f\u5199\u3001toUpperCase()\u3001UPSHIFT()\uff1a\u5168\u90e8\u8f6c\u5927\u5199 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0toLowerCase\u00a0:[',l_string.toLowerCase(),']'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0DOWNSHIFT\u00a0\u00a0\u00a0:[',DOWNSHIFT(l_string),']'\u00a0\u00a0\u00a0\u00a0#DOWNSHIFT()\u3001UPSHIFT()\u00a0\u00a0\u5bf9string\u3001char\u3001varchar\u90fd\u53ef\u4ee5\u64cd\u4f5c \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0toUpperCase\u00a0:[',l_string.toUpperCase(),']'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0UPSHIFT\u00a0\u00a0\u00a0\u00a0\u00a0:[',UPSHIFT(l_string),']'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#trim()\uff1a\u53bb\u6389\u9996\u5c3e\u7a7a\u683c\u3001trimLeft()\uff1a\u4ec5\u53bb\u6389\u9996\u7a7a\u683c\u3001trimRight()\uff1a\u4ec5\u53bb\u6389\u672b\u5c3e\u7684\u7a7a\u683c \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0trim()\u00a0\u00a0\u00a0\u00a0\u00a0:[',l_string.trim(),']'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0trimLeft()\u00a0:[',l_string.trimLeft(),']'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0trimRight():[',l_string.trimRight(),']'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0#subString\uff1a\u622a\u53d6\u5b50\u5b57\u7b26\u4e32 \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0subString():[',l_string.subString(7,10),']'\u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0subString():[',l_string.subString(7,16),']'\u00a0\u00a0#\u7d22\u5f15\u4f4d\u7f6e\u8d85\u51fa\u539f\u5b57\u7b26\u4e32\u957f\u5ea6\u65f6\u8fd4\u56denull \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0LET\u00a0l_varchar\u00a0=\u00a0l_string\u00a0\u00a0\r\n \u00a0\u00a0\u00a0#DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0[\u622a\u53d6,\u5b57\u7b26]:[',l_string[7,10],']'\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0#\u8fd9\u91cc\u662f\u9519\u8bef\u7684\u8bed\u6cd5,[]\u622a\u53d6\u5b57\u7b26\u4e32\u53ea\u9002\u5408CHAR\u00a0&\u00a0VARCHAR\u64cd\u4f5c \u00a0\u00a0\r\n \u00a0\u00a0\u00a0\u00a0DISPLAY\u00a0'[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0[\u622a\u53d6,\u5b57\u7b26]:[',l_varchar[7,10],']'\u00a0\u00a0\r\n END\u00a0MAIN<\/code><\/pre>\n
 <\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n
l_stringBlank\u00a0=\u00a0l_stringKnalb\u00a0:\u00a0equals\u00a0\u00a0\r\nl_blankTrim\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0NOT\u00a0NULL\u00a0\u00a0\r\nl_blankCLIPPED\u00a0\u00a0\u00a0NOT\u00a0NULL\u00a0\u00a0\r\nl_varcharTrim\u00a0\u00a0\u00a0\u00a0IS\u00a0NULL\u00a0\u00a0\r\nl_varcharCLIPPED\u00a0IS\u00a0NULL\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0append\u00a0[HIJKLMN]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0[:\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0HIJKLMN]\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0equals\u00a0[BCD]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0equals\u00a0[ABCDEFG]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0equals\u00a0[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0]\u00a0\u00a0:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0equals\u00a0[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0equalsIgnoreCase\u00a0[aBcD]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0equalsIgnoreCase\u00a0[\u00a0\u00a0\u00a0\u00a0\u00a0ABcDEFg\u00a0\u00a0\u00a0]:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0length:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a015\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0CharAt(\u00a08):[C]\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0CharAt(16):[]\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0IndexOf(ABC):\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a06\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0IndexOf(AC)\u00a0:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0IndexOf(AC)\u00a0:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0toLowerCase\u00a0:[\u00a0\u00a0\u00a0\u00a0\u00a0abcdefg\u00a0\u00a0\u00a0]\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0DOWNSHIFT\u00a0\u00a0\u00a0:[\u00a0\u00a0\u00a0\u00a0\u00a0abcdefg\u00a0\u00a0\u00a0]\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0toUpperCase\u00a0:[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0UPSHIFT\u00a0\u00a0\u00a0\u00a0\u00a0:[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0trim()\u00a0\u00a0\u00a0\u00a0\u00a0:[ABCDEFG]\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0trimLeft()\u00a0:[ABCDEFG\u00a0\u00a0\u00a0]\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0trimRight():[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG]\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0subString():[BCDE]\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0subString():[]\u00a0\u00a0\r\n[\u00a0\u00a0\u00a0\u00a0\u00a0ABCDEFG\u00a0\u00a0\u00a0]\u00a0[\u622a\u53d6,\u5b57\u7b26]:[BCDE]\u00a0\u00a0<\/code><\/pre>\n
 <\/p>\n
——————————————————————————————————————————————
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\n\u8bed\u6cd5 DATE
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\n——————————————————————————————————————————————
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\n\u8bed\u6cd5 DATETIME qua11\u00a0 TO\u00a0 qua12
\nqua11\u53ef\u53d6\u503c YEAR\u3001MONTH\u3001DAY\u3001HOUR\u3001MINUTE\u3001SECOND\u3001FRACTION
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\n——————————————————————————————————————————————
\n6\u3001 INTERVAL\u00a0\u00a0\u00a0\u65e5\u671f\u65f6\u95f4<\/p>\n
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\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n
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