数据库|mysql教程
sql语句,update,mysql
数据库-mysql教程
sql语句：
卖手机钓鱼网站源码,VScode能对页面做测试吗,ubuntu-10.10,tomcat部署多节点,web爬虫前端,php编写管理系统,正规的seo官网优化推广lzw
update item i,resource_library r,resource_review_link l set i.name=CONCAT(‘Review:’,r.resource_name) where i.item_id=l.instance_id
and l.level=’item’ and r.resource_id=l.resource_id and i.name=”
奇迹辅助源码,vscode bug插件,ubuntu透明防火墙,tomcat页面打开,sqlite 语句执行记录,组织架构图 js插件,前端pc端框架bgui,土里黄色爬虫图片,php正则url,张家港seo公司,缓存电影网站源码,网页加载等待效果,商城wap模板下载,网站关于我们页面代码,php通用管理系统源码,复利源码程序lzw
JOIN UPDATE & JOIN DELETE
企业首页源码,ubuntu系统屏幕截图,tomcat启动卡主不动了,用爬虫爬取,php会议室预约系统,SEO指的是答案lzw
update a
set a.schoolname = b.schoolname
from tb_Std as a join tb_Sch as b on a.School = b.School
where a.std_year =
go
/*
(2 row(s) affected)
*/
select *
from tb_Std as a join tb_Sch as b on a.School = b.School
/*
A School A A School
2 A A School A A School
3 C A School C C School
4 D D School D D School
(4 row(s) affected)
*/
delete a
from table1 a, table2 b
where a.col1 = b.col1
and a.col2 = b.col2
The above SQL statement runs fine in SQL Server.
If the Oracle 9i has different syntax or if there is any other way to accomplish this with a single delete statement that would be really helpful.
> Hi,
>
> Is the following delete statement possible in Oracle 9i.
>
> delete a
> from table1 a, table2 b
> where a.col1 = b.col1
> and a.col2 = b.col2
>
> The above SQL statement runs fine in SQL Server.
>
> If the Oracle 9i has different syntax or if there is any other way to accomplish this with a single delete statement that would be really helpful.
>
> Thanx in advance.
>
> -Bheem
Bheem,
Try this:
DELETE FROM table1 a where exists (select 1 from table2 b
where a.col1 = b.col1 and a.col2 = b.col2);
Hope this helps,
Tom
