{"id":348,"date":"2023-09-16T10:44:54","date_gmt":"2023-09-16T02:44:54","guid":{"rendered":""},"modified":"2023-09-16T15:50:11","modified_gmt":"2023-09-16T07:50:11","slug":"sql-server%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%88%aa%e5%8f%96%ef%bc%8csql-server%e6%a0%b9%e6%8d%ae%e6%8c%87%e5%ae%9a%e5%ad%97%e7%ac%a6%e6%88%aa%e5%8f%96","status":"publish","type":"post","link":"https:\/\/mushiming.com\/348.html","title":{"rendered":"SQL SERVER\u5b57\u7b26\u4e32\u622a\u53d6\uff0cSQL SERVER\u6839\u636e\u6307\u5b9a\u5b57\u7b26\u622a\u53d6"},"content":{"rendered":"

\n <\/path> \n<\/svg> <\/p>\n

\u5b57\u7b26\u4e32\u622a\u53d6<\/strong>
\u5b57\u7b26\u4e32\u622a\u53d6\u51fd\u6570\uff1asubstring(str,startlen,endlen)
\u9700\u8981\u622a\u53d6\u7684\u5b57\u7b26\uff1astr
\u5f00\u59cb\u957f\u5ea6\uff1astartlen --\u4ece1\u5f00\u59cb
\u7ed3\u675f\u957f\u5ea6\uff1aendlen -\u4ece1\u5f00\u59cb
\u7528\u6cd5\uff1aselect substring(\u201cabcdefg\u201d,1,2)
\u8f93\u51fa\uff1abc<\/p>\n

\u4e3a\u5565\u8fd9\u4e48\u9ebb\u70e6\uff1a\u56e0\u4e3asql server\u6ca1\u6709substring_index\u51fd\u6570\uff0c\u53ea\u80fd\u7528substring\u51fd\u6570<\/strong>
\u6839\u636e\u6307\u5b9a\u5b57\u7b26\u622a\u53d6
\u9700\u8981\u7528\u5230\u7684\u51fd\u6570\uff1a
substring\u2013\u4ecb\u7ecd\u4e0a\u9762\u5df2\u7ecf\u5199\u4e86
LTRIM --\u53bb\u9664\u5de6\u8fb9\u7a7a\u683c
RTRIM\u2013\u53bb\u9664\u53f3\u8fb9\u7a7a\u683c
len\u2013\u83b7\u53d6\u5b57\u7b26\u957f\u5ea6\uff0c\u4ece1\u5f00\u59cb<\/p>\n

charindex(target,str)\u2013\u8fd4\u56de\u6307\u5b9a\u5b57\u7b26\u7684\u4e0b\u6807\uff0c\u4ece1\u5f00\u59cb
\u76ee\u6807\u5b57\u7b26\uff1atarget\u2013\u53ef\u4ee5\u6307\u5b9a\u4efb\u610f\u4e1c\u897f\u5b57\u7b26
\u5b57\u7b26\uff1astr\u2013\u76ee\u6807\u5b57\u7b26\u6240\u5728\u7684\u5b57\u7b26\u4e32
\u7528\u6cd5\uff1acharindex(\u201d@\u201c,\u201c1234@abcd\u201d)
\u8f93\u51fa\uff1a4<\/p>\n

Tips\uff1a\u8fd9\u91cc\u6f14\u793a\u7684\u5b57\u7b26\u4e2d\u6ca1\u5305\u542b\u6362\u884c\u7b26\u548c\u5360\u4f4d\u7b26\uff0c\u8bf7\u81ea\u884c\u6d4b\u8bd5<\/p>\n

\u5b9e\u6218sql<\/strong>\uff1a\u4e5f\u53ef\u4ee5\u76f4\u63a5\u62ff\u6765\u7528\uff1b
\u9700\u8981\u6539\u52a8\u7684\u5730\u65b9\uff1a\u8868\u540d\uff0c\u76ee\u6807\u5b57\u7b26\u4e32\uff1ab.selectname\uff0c\u76ee\u6807\u5b57\u7b26:\"\/\"<\/strong><\/p>\n

\nSELECT\n\tLTRIM<\/span>(<\/span> RTRIM<\/span>(<\/span> b.<\/span>selectname )<\/span> )<\/span> AS \"\u5b57\u7b26\u4e32\"<\/span>,<\/span>\n\tcharindex<\/span>(<\/span> '\/'<\/span>,<\/span> LTRIM<\/span>(<\/span> RTRIM<\/span>(<\/span> b.<\/span>selectname )<\/span> )<\/span> )<\/span> +<\/span> 1<\/span> AS \"\u5f00\u59cb\u4f4d\u7f6e\"<\/span>,<\/span>\n\tlen<\/span>(<\/span> b.<\/span>selectname )<\/span> AS \"\u7ed3\u675f\u4f4d\u7f6e\"<\/span>,<\/span>\n\tSUBSTRING<\/span> (<\/span>\n\t\tLTRIM<\/span>(<\/span> RTRIM<\/span>(<\/span> b.<\/span>selectname )<\/span> )<\/span>,<\/span>\n\t\tcharindex<\/span>(<\/span> '\/'<\/span>,<\/span> LTRIM<\/span>(<\/span> RTRIM<\/span>(<\/span> b.<\/span>selectname )<\/span> )<\/span> )<\/span> +<\/span> 1<\/span>,<\/span>\n\t\tlen<\/span>(<\/span> b.<\/span>selectname )<\/span> \n\t)<\/span> AS \"\u7ed3\u679c\"<\/span> \nFROM\n\tworkflow_billfield a\n\tLEFT JOIN workflow_selectitem b ON a.<\/span>id=<\/span> b.<\/span>fieldid \nWHERE\n\tbillid =<\/span> -<\/span> 13<\/span> \n\tAND fieldname =<\/span> 'fylx1'<\/span>;<\/span>\n<\/code><\/pre>\n
sql\u6267\u884c\u7ed3\u679c\uff1a
 \"SQL<\/p>\n
\u6587\u7ae0\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u6709\u96f7\u540c\u7eaf\u5c5e\u610f\u5916\uff1b
 \u6b22\u8fce\u5927\u5bb6\u8e0a\u8dc3\u53d1\u8a00\uff0c\u79ef\u6781\u8865\u5145\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"SQLSERVER\u5b57\u7b26\u4e32\u622a\u53d6\uff0cSQLSERVER\u6839\u636e\u6307\u5b9a\u5b57\u7b26\u622a\u53d6_sqlserver\u622a\u53d6\u6307\u5b9a\u5b57\u7b26\u524d\u7684\u5b57\u7b26\u4e32","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[82],"tags":[],"_links":{"self":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/348"}],"collection":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/comments?post=348"}],"version-history":[{"count":0,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/348\/revisions"}],"wp:attachment":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/media?parent=348"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/categories?post=348"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/tags?post=348"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}