|
他们的对应关系可以参考下面图示相关测试实例如下：
相关测试实例如下：
<div class="codetitle"><a style="CURSOR: pointer" data="85618" class="copybut" id="copybut85618" onclick="doCopy('code85618')"> 代码如下:<div class="codebody" id="code85618">
use tempdb
go
if (object_id ('t1' ) is not null ) drop table t1
if (object_id ('t2' ) is not null ) drop table t2
go
create table t1 (a int )
insert into t1 select 1 union select 2 union select 3
create table t2 (a int )
insert into t2 select 3 union select 4 union select 5
go
select from t1 union select from t2
go
/ 求表并集
1
2
3
4
5/
select from t1 union all select from t2
go
/求表并集不过滤重复
1
2
3
3
4
5/
select from t1 except select from t2
go
/求t1对t2的差集
1
2/
select from t1 intersect select from t2
go
/求t1对t2的交集
3/
（编辑：李大同）
【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!
|
