sql求两表的并集交集非交集差集结果集排序
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create table A( id int IDENTITY(1,1) Not null primary key, name varchar(20) not null default(‘‘), ) INSERT INTO [A]([name]) VALUES(‘a‘) INSERT INTO [A]([name]) VALUES(‘b‘) INSERT INTO [A]([name]) VALUES(‘c‘) INSERT INTO [A]([name]) VALUES(‘d‘) INSERT INTO [A]([name]) VALUES(‘e‘) INSERT INTO [A]([name]) VALUES(‘f‘) INSERT INTO [A]([name]) VALUES(‘g‘) create table B( id int IDENTITY(1,1) Not null primary key, name varchar(20) not null default(‘‘), ) INSERT INTO [B]([name]) VALUES(‘a‘) INSERT INTO [B]([name]) VALUES(‘b‘) INSERT INTO [B]([name]) VALUES(‘c‘) INSERT INTO [B]([name]) VALUES(‘d‘) INSERT INTO [B]([name]) VALUES(‘h‘) INSERT INTO [B]([name]) VALUES(‘i‘) INSERT INTO [B]([name]) VALUES(‘j‘)
SELECT * from A union select * from B --查询A\B表的并集重复的项只显示一个 SELECT * from A union all select * from B ----查询A\B表的并集重复的也显示 SELECT * from A union all select * from B order by id asc ---查询A\B表的并集重复的也显示,并按照id升序 SELECT * from A INTERSECT select * from B ----查询两表的交集 SELECT * from A EXCEPT select * from B ----查询A表中不与B表重复的记录 --查询A\B两表中所有非交集的记录 (SELECT * from A EXCEPT select * from B) union (SELECT * from B EXCEPT select * from A)
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