{"id":42,"date":"2020-01-16T17:01:48","date_gmt":"2020-01-16T09:01:48","guid":{"rendered":"http:\/\/22pig.com\/?p=42"},"modified":"2020-01-16T17:01:48","modified_gmt":"2020-01-16T09:01:48","slug":"sql-server%e5%88%a0%e9%99%a4%e9%87%8d%e5%a4%8d%e8%ae%b0%e5%bd%95%e5%8f%aa%e4%bf%9d%e7%95%99%e4%b8%80%e6%9d%a1","status":"publish","type":"post","link":"http:\/\/22pig.com\/?p=42","title":{"rendered":"sql server\u5220\u9664\u91cd\u590d\u8bb0\u5f55\u53ea\u4fdd\u7559\u4e00\u6761"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">delete from sys_project<br> from sys_project as aa<br> left join (<br>     select min(id) as id from sys_project <br>     group by pro_no<br> ) as bb<br> on aa.id = bb.id<br> where bb.id is null<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u5c31\u662f\u901a\u8fc7\u5de6\u5916\u8fde\u63a5\u67e5\u8be2\u51fa\u6309\u7167sysCode\u5206\u7ec4\u7684\u6240\u6709\u91cd\u590d\u6216\u4e0d\u91cd\u590d\u7684\u8bb0\u5f55\u7ec4\u4e2d\u7684\u7b2c\u4e00\u6761\u8bb0\u5f55\uff08\u901a\u8fc7min(id)\u627e\u51faid\u6700\u5c0f\u7684\u4e00\u6761\uff09\uff0c\u5982\u679c\u5de6\u5916\u8fde\u63a5\u6ca1\u6709\u5339\u914d\u7684\u8bb0\u5f55\uff0c\u5219\u5de6\u5916\u8fde\u63a5\u7684\u8bb0\u5f55\u662f\u7a7a\u7684\uff0c\u5373\u53ef\u4ee5\u901a\u8fc7bb.id is null\u7684\u6761\u4ef6\u8fc7\u6ee4\u51fa\u591a\u4f59\u7684\u91cd\u590d\u8bb0\u5f55\u8fdb\u884c\u5220\u9664\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">alter table  sys_project  add constraint  sys_project_uni  unique (prj_no)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>delete from sys_project from sys_project as aa left join ( select min(id) as id from sys_project group by pro_no ) as bb on aa.id = bb.id where bb.id is null \u8fd9\u91cc\u5c31\u662f\u901a\u8fc7\u5de6\u5916\u8fde\u63a5\u67e5\u8be2\u51fa\u6309\u7167sysCode\u5206\u7ec4\u7684\u6240\u6709\u91cd\u590d\u6216\u4e0d\u91cd\u590d\u7684\u8bb0\u5f55\u7ec4\u4e2d\u7684\u7b2c\u4e00\u6761\u8bb0\u5f55\uff08\u901a\u8fc7min(id)\u627e\u51faid\u6700\u5c0f\u7684\u4e00\u6761\uff09\uff0c\u5982\u679c\u5de6\u5916\u8fde\u63a5\u6ca1\u6709\u5339\u914d\u7684\u8bb0\u5f55\uff0c\u5219\u5de6\u5916\u8fde\u63a5\u7684\u8bb0\u5f55\u662f\u7a7a\u7684\uff0c\u5373\u53ef\u4ee5\u901a\u8fc7bb.id is null\u7684\u6761\u4ef6\u8fc7\u6ee4\u51fa\u591a\u4f59\u7684\u91cd\u590d\u8bb0\u5f55\u8fdb\u884c\u5220\u9664\u3002 alter table sys_project add constraint sys_project_uni unique (prj_no)<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-42","post","type-post","status-publish","format-standard","hentry","category-sql-server"],"_links":{"self":[{"href":"http:\/\/22pig.com\/index.php?rest_route=\/wp\/v2\/posts\/42","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/22pig.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/22pig.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/22pig.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/22pig.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=42"}],"version-history":[{"count":0,"href":"http:\/\/22pig.com\/index.php?rest_route=\/wp\/v2\/posts\/42\/revisions"}],"wp:attachment":[{"href":"http:\/\/22pig.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=42"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/22pig.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=42"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/22pig.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=42"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}