{"id":5015,"date":"2024-01-13T19:29:07","date_gmt":"2024-01-13T11:29:07","guid":{"rendered":"https:\/\/www.kenpai.com\/cms\/5015\/"},"modified":"2024-01-13T19:29:07","modified_gmt":"2024-01-13T11:29:07","slug":"%e5%ae%b3%e4%ba%ba%e7%9a%84null%e5%80%bc%ef%bc%8c%e5%9c%a8sql-server-%e4%b8%ad%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.kenpai.com\/cms\/5015\/","title":{"rendered":"\u5bb3\u4eba\u7684null\u503c\uff0c\u5728SQL server \u4e2d\u3002"},"content":{"rendered":"<\/p>\n

\u6211\u4eec\u77e5\u9053\u5728sql server \u4e2d\uff0c\u6709\u4e00\u4e2a NULL\u8868\u793a\u4e3a\u7a7a\uff0c\u8fd9\u4e2anull\u8981\u662f\u5904\u7406\u4e0d\u597d\uff0c\u53ef\u662f\u8981\u5bb3\u6b7b\u4eba\u7684 \uff1a\uff09<\/p>\n

\u56e0\u4e3a\u5728sql servel \u4e2d \u5982\u679c\u4f60\u62ff\u4e00\u4e2a\u503c\u53bb\u548cnull\u503c, \u4e0d\u7ba1\u662f\u7528\u7b49\u4e8e\uff0c\u8fd8\u662f\u4e0d\u7b49\u4e8e\uff0c\u5b83\u5747\u8fd4\u56defalse<\/p>\n

\n

\u4e3e\u4f8b\u6765\u8bf4\u5c31\u662f\uff1a
select \\\\\\’aa\\\\\\’ where \\\\\\’aa\\\\\\’ <> null
select \\\\\\’aa\\\\\\’ where \\\\\\’aa\\\\\\’ = null<\/p>\n

\u8fd0\u884c\u4ee5\u4e0a\u4e24\u53e5SQL\u7ed3\u679c\u67e5\u8be2\u51fa\u6765\u7684\u6570\u636e\u90fd\u662f\u7a7a\uff0c\u7b2c\u4e00\u53e5SQL\u5e76\u6ca1\u6709\u6309\u9884\u671f\u7684\u663e\u793a\u5b57\u7b26\u4e32aa,\u800c\u8981\u663e\u793a\u51fa\u6765\u53ea\u6709\u6709\u4e0b\u9762\u7684SQL\u8bed\u53e5<\/p>\n

select \\\\\\’aa\\\\\\’ where \\\\\\’aa\\\\\\’ is not null<\/p>\n

\u8fd8\u6709\u5c31\u662f\u5728not in \u4e2d\u5982\u4e0b
select \\\\\\’aa\\\\\\’ where \\\\\\’aa\\\\\\’ not in ( null, \\\\\\’bb\\\\\\’)<\/p>\n

\u6309\u7406\uff0c\u5e94\u80fd\u663e\u793a\u51fa\u5b57\u7b26\u4e32\\\\\\’aa\\\\\\’,\u7ed3\u679c\u5374\u6ca1\u6709\u663e\u793a\u3002\u56e0\u4e3a \\\\\\’aa\\\\\\’\u4e0enull\u7684\u5173\u7cfb\u65e2\u4e0d\u662f\u76f8\u7b49\uff0c\u4e5f\u4e0d\u662f\u4e0d\u76f8\u7b49\u3002<\/p>\n

\u4eca\u5929\u5728\u505a\u67e5\u8be2\u65f6\u5c31\u9047\u5230\u4e00\u4e2a\u76f8\u540c\u7684\u95ee\u9898\uff0c\u5982\u4e0b\u7684\u67e5\u8be2\u8bed\u53e5\u600e\u4e48\u4e5f\u67e5\u4e0d\u51fa\u6570\u636e\u3002\u4f46\u4e00\u5206\u6790\u6570\u636e\uff0c\u53c8\u7684\u786e\u80fd\u67e5\u51fa<\/p>\n

SELECT
*
FROM dbo.CheckVoidSo
WHERE SoNumber NOT IN (
SELECT DISTINCT SoNumber
FROM imk.dbo.DayliProcessCreditForVoidSO<\/p>\n

)<\/p>\n

\u6700\u540e\u7ec8\u4e8e\u627e\u5230\u539f\u56e0\u5c31\u662f\u56e0\u4e3a\u5b50\u67e5\u8be2\u662f\u6709\u7a7a\u503c\uff0c\u5c31\u662f\u90a3\u4e2a\u7a7a\u503c\u60f9\u7684\u7978\u3002\u4e00\u6392\u9664\u7a7a\u503c\uff0c\u4e00\u5207\u6b63\u5e38\u3002<\/p>\n

SELECT *
FROM dbo.CheckVoidSo
WHERE SoNumber NOT IN (
SELECT DISTINCT SoNumber
FROM imk.dbo.DayliProcessCreditForVoidSO
WHERE NOT sonumber IS NULL
)<\/p>\n<\/p>\n

\u66f4\u591a\u5173\u4e8e\u4e91\u670d\u52a1\u5668\uff0c\u57df\u540d<\/a><\/span>\u6ce8\u518c\uff0c\u865a\u62df\u4e3b\u673a\u7684\u95ee\u9898\uff0c\u8bf7\u8bbf\u95ee\u57a6\u6d3e\u79d1\u6280<\/a><\/span>\u5b98\u7f51\uff1awww.kenpai.com<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

\u6211\u4eec\u77e5\u9053\u5728sql server \u4e2d\uff0c\u6709\u4e00\u4e2a NULL\u8868\u793a\u4e3a\u7a7a\uff0c\u8fd9\u4e2anull\u8981\u662f\u5904\u7406\u4e0d\u597d\uff0c\u53ef\u662f\u8981\u5bb3\u6b7b\u4eba\u7684 \uff1a\uff09\u56e0\u4e3a\u5728sql servel \u4e2d \u5982\u679c\u4f60\u62ff\u4e00\u4e2a<\/p>\n","protected":false},"author":2,"featured_media":4348,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3322],"tags":[3885],"class_list":["post-5015","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ktougao","tag-nullsql-server-"],"_links":{"self":[{"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/posts\/5015","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/comments?post=5015"}],"version-history":[{"count":0,"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/posts\/5015\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/media\/4348"}],"wp:attachment":[{"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/media?parent=5015"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/categories?post=5015"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/tags?post=5015"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}