本文介绍了SQL union而不是in子句的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有桌子
I have table
CREATE TABLE supportContacts
(
id int auto_increment primary key,
type varchar(20),
details varchar(30),
code_id int
);
INSERT INTO supportContacts
(type, details,code_id)
VALUES
('Email0', '[email protected]',1033),
('Email1', '[email protected]',1031),
('Email2', '[email protected]',1033),
('Email3', '[email protected]',1031),
('Email5', '[email protected]',1032),
('Email6', '[email protected]',1032),
('Twitter4', '4@sqlfiddle',1033);
当我运行此查询时
when i ran this query
Select type from supportContacts where code_id=1033
union
(
Select type from supportContacts where code_id
not in (Select type from supportContacts where code_id=1033)
)
输出是
TYPE
Email0
Email2
Twitter4
Email1
Email3
电子邮件5
电子邮件6
我想用join替换这个查询我该怎么做。
谢谢
output is
TYPE
Email0
Email2
Twitter4
Email1
Email3
Email5
Email6
I want to replace this query with join's how can i do that.
Thanks
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