{"id":1195,"date":"2016-09-10T14:41:37","date_gmt":"2016-09-10T06:41:37","guid":{"rendered":"http:\/\/dachengge.com\/?p=1195"},"modified":"2016-09-10T14:41:37","modified_gmt":"2016-09-10T06:41:37","slug":"update%e8%af%ad%e5%8f%a5%e6%9b%b4%e6%96%b0%e8%87%aa%e8%bf%9e%e6%8e%a5%e8%a1%a8","status":"publish","type":"post","link":"http:\/\/dachengge.com\/?p=1195","title":{"rendered":"UPDATE\u8bed\u53e5\u66f4\u65b0\u81ea\u8fde\u63a5\u8868"},"content":{"rendered":"

\u6700\u8fd1\u8ba1\u7b97\u6570\u636e\u65f6\uff0c\u9700\u8981\u7528UPDATE\u5bf9\u8868\u8fdb\u884c\u66f4\u65b0\uff0c\u6761\u4ef6\u8fd8\u662f\u5728\u5f53\u524d\u8868\u4e2d\uff0c\u4e8e\u662f\u5f88\u76f4\u89c2\u5730\u5199\u4e86SQL\u8bed\u53e5\u8fdb\u884c\u66f4\u65b0\uff0c\u6ca1\u60f3\u5230\u8bed\u53e5\u662f\u9519\u8bef\u7684\uff0c\u7ecf\u8fc7\u67e5\u8be2\u624b\u518c\u7ec8\u4e8e\u77e5\u9053\u4e86\u95ee\u9898\u6240\u5728\uff0c\u4e5f\u91cd\u65b0\u5b66\u4e60\u4e86\u4e00\u4e0bUPDATE\u8bed\u53e5\u3002
\n
\n1 \u8981\u89e3\u51b3\u7684\u95ee\u9898<\/strong>
\nbase2015\u8868\u540c\u65f6\u5b58\u57282015\u5e74\u548c2016\u5e74\u7684\u4fdd\u5355\u6570\u636e\uff0c\u73b0\u5728\u8981\u5bf9\u5176\u4e2d2015\u5e749\u6708\u7684\u6570\u636e\u8fdb\u884c\u66f4\u65b0\uff0c\u6807\u8bb0\u51fa\u54ea\u4e9b\u57282016\u5e74\u5df2\u7ecf\u7eed\u56de\uff0c\u662f\u5426\u7eed\u56de\u7684\u6807\u51c6\u662fVIN\u7801\u52a0\u9669\u79cd(VINAndRisk\uff0c\u6709\u7d22\u5f15)\u76f8\u540c\u3002
\n2 \u9519\u8bef\u7684\u4f5c\u6cd5<\/strong>
\nUPDATE base2015
\nSET isRenew=’\u662f’
\nWHERE enddate>=’2015-8-31′ AND enddate<=’2015-9-29′ AND VINandRisk IN
\n(
\nSELECT VINandRisk
\nFROM base2015
\nWHERE startdate>=’2016-9-1′ AND startdate<=’2016-9-30′
\n);
\n\u63d0\u793a\u7684\u4fe1\u606f\u662f\uff1aYou can’t specify target table ‘base2015’ for update in FROM clause.\u610f\u601d\u662f\u5728FROM\u8bed\u53e5\u4e2d\u4e0d\u80fd\u5305\u62ec\u8981\u88ab\u66f4\u65b0\u7684\u8868\u3002
\n3\u6b63\u786e\u7684\u4f5c\u6cd5<\/strong>
\nUPDATE base2015 AS part2015 INNER JOIN  base2015 AS part2016 ON part2015.VINandRisk =part2016.VINandRisk
\nSET part2015.isRenew=’\u662f’
\nWHERE part2015.endDate>=’2015-08-31′ AND part2015.endDate<=’2015-09-29′
\nAND part2016.startDate>=’2016-09-01′ AND part2016.startDate<=’2016-09-30′;
\n\u6216\u8005\uff1a
\n<\/span><\/strong>UPDATE base2015 AS part2015,base2015 AS part2016
\nSET part2015.`isRenew`=’\u662f’
\nWHERE part2015.endDate>=’2015-08-31′ AND part2015.endDate<=’2015-09-29′
\nAND part2016.startDate>=’2016-09-01′ AND part2016.startDate<=’2016-09-30′
\nAND part2015.`VINandRisk`=part2016.`VINandRisk`;
\n\u6267\u884c\u7ed3\u679c\u6b63\u786e\uff0c\u800c\u4e14\u901f\u5ea6\u5f88\u5feb\uff0c\u5c31\u662f\u540c\u4e00\u4e2a\u8868base2015\u8bbe\u7f6e\u6709\u4e24\u4e2a\u522b\u540dpart2015\u548cpart2016\uff0c\u5f53\u4f5c\u4e24\u4e2a\u8868\u7528\u3002
\n4 UPDATE\u8bed\u6cd5\u603b\u7ed3<\/strong>
\n\u7ecf\u8fc7\u67e5\u8be2\u624b\u518c\uff0c\u4e86\u89e3\u5230UPDATE\u6709\u4e24\u79cd\u4f7f\u7528\u65b9\u6cd5\uff0c\u4e00\u79cd\u9002\u5408\u66f4\u65b0\u5355\u8868\uff0c\u4e00\u79cd\u9002\u5408\u66f4\u65b0\u591a\u8868\u3002
\n4.1 \u66f4\u65b0\u5355\u8868
\nUPDATE [LOW_PRIORITY] [IGNORE] tbl_name
\nSET col_name1=expr1 [, col_name2=expr2 …]
\n[WHERE where_definition]
\n[ORDER BY …]
\n[LIMIT row_count];
\nLOW_PRIORITY<\/span>\u610f\u601d\u662f\u964d\u4f4e\u4f18\u5148\u7ea7\uff0c\u5373\u4e0d\u52a0\u9501\uff0c\u8fd9\u6837\u8fdb\u884c\u591a\u7528\u6237\u64cd\u4f5c\u65f6\uff0c\u4e0d\u5f71\u54cd\u5176\u4ed6\u7528\u6237\u8fdb\u884c\u8bfb\u53d6\u7b49\u64cd\u4f5c\uff1b
\nIGNORE<\/span>\u7528\u5904\u662f\u5f53\u8981\u63d2\u5165\u7684\u6570\u636e\u4e3b\u952e\/\u7d22\u5f15\u5728\u6570\u636e\u8868\u4e2d\u5b58\u5728\u65f6\u4e0d\u63d0\u793a\u9519\u8bef\u6b63\u5e38\u8fd0\u884c\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528REPLACE\u6765\u66ff\u4ee3\uff1b
\nORDER BY\u914d\u4e0a<\/span>LIMIT\u9002\u5408\u8fd9\u6837\u7684\u573a\u666f\uff1a\u5bf9\u6210\u7ee9\u6392\u540d\u524d\u5341\u7684\u4eba\u5458\u4fe1\u606f\u8fdb\u884c\u66f4\u65b0<\/span><\/span>\u3002<\/span>
\n4.2 \u66f4\u65b0\u591a\u8868
\nUPDATE [LOW_PRIORITY] [IGNORE] table_references
\nSET col_name1=expr1 [, col_name2=expr2 …]
\n[WHERE where_definition];<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6700\u8fd1\u8ba1\u7b97\u6570\u636e\u65f6\uff0c\u9700\u8981\u7528UPDATE\u5bf9\u8868\u8fdb\u884c\u66f4\u65b0\uff0c\u6761\u4ef6\u8fd8\u662f\u5728\u5f53\u524d\u8868\u4e2d\uff0c\u4e8e\u662f\u5f88\u76f4\u89c2\u5730\u5199\u4e86SQL\u8bed\u53e5\u8fdb\u884c\u66f4\u65b0\uff0c\u6ca1\u60f3\u5230 … \u7ee7\u7eed\u9605\u8bfbUPDATE\u8bed\u53e5\u66f4\u65b0\u81ea\u8fde\u63a5\u8868<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[103,112,505],"views":3347,"_links":{"self":[{"href":"http:\/\/dachengge.com\/index.php?rest_route=\/wp\/v2\/posts\/1195"}],"collection":[{"href":"http:\/\/dachengge.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/dachengge.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/dachengge.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/dachengge.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1195"}],"version-history":[{"count":0,"href":"http:\/\/dachengge.com\/index.php?rest_route=\/wp\/v2\/posts\/1195\/revisions"}],"wp:attachment":[{"href":"http:\/\/dachengge.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/dachengge.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1195"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/dachengge.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}