这两条 sql 语句可否合并为一条？ - V2EX

这两条 sql 语句可否合并为一条？ - V2EX

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这是一个创建于 3644 天前的主题，其中的信息可能已经有所发展或是发生改变。

SELECT * FROM comments where postId = 92057 AND auditBy IS NOT NULL;
SELECT * FROM comments where postId = 92057 AND auditBy IS NULL AND userId = 1111;

9 条回复

1

qsl0913

2015-11-17 16:06:50 +08:00

SELECT * FROM comments where postId = 92057 AND (auditBy IS NOT NULL or (auditBy IS NULL AND userId = 1111));

2

corboy

OP

2015-11-17 16:06:57 +08:00

自己已解决，谢谢。

3

barbery

2015-11-17 16:07:02 +08:00

要么条件合并： SELECT * FROM comments where postId = 92057 AND auditBy IS NOT NULL OR (auditBy IS NULL AND userId = 1111)
要么链接来执行： SELECT * FROM comments where postId = 92057 AND auditBy IS NOT NULL UNION ALL SELECT * FROM comments where postId = 92057 AND auditBy IS NULL AND userId = 1111;

4

lingdong

2015-11-17 16:07:06 +08:00

SELECT * FROM comments where postId = 92057 AND auditBy IS NOT NULL OR (auditBy IS NULL AND userId = 1111);
这样 OK 吗？

5

ixiaozhi

2015-11-17 16:07:14 +08:00

SELECT * FROM comments where postId = 92057 AND ( auditBy IS NOT NULL ) OR ( auditBy IS NULL AND userId = 1111)

6

corboy

OP

2015-11-17 16:07:16 +08:00

@qsl0913 thanks

7

123123

2015-11-17 19:23:14 +08:00

1

@barbery @lingdong @ixiaozhi
有其他条件的情况下， OR 条件不加上括号怎么行？
看三层都这么写也是醉了

8

barbery

2015-11-17 22:59:31 +08:00

@123123 谢谢指出问题，已感谢

9

TangMonk

2015-11-18 10:27:49 +08:00

UNION

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