Question

我有一个MAssive sql查询......我内心加入的几个表...现在，我必须更新它们.. 我有Noooo想法如何做到这一点..这是我的查询（这是有效的）。之后，我试图让更新声明工作的一种方式，但......我显然没有成功..

我的SQL查询是

select t1.name AS DistroName,t2.name AS OriginName, t3.name AS DesktopName, t3.name AS desktoptest , t2.country, t1.status, t2.description , t5.name as oldtest, t6.name as multitest, t4.name as begintest
from alldistros t1 
LEFT join origin t2 on t1.name=t2.name
LEFT join desktop t3 on t2.name=t3.name
LEFT join beginnerdistributions t4 on t3.name=t4.name
LEFT join oldcomputers t5 on t4.name=t5.name
LEFT join multimedia t6 on t5.name=t6.name
WHERE t1.name = 'Absolute LInux'

现在我如何更新，比如说t1.name字段为“CatMan”，其中t1.name ='Absolute LInux'？

我确实无法在这种特殊情况下看到任何合乎逻辑的做法......

谢谢你，阮

Answer 1

 UPDATE alldistros SET name="CatMan" WHERE name = "Absolute Linux"

我认为你将表和查询的概念混淆了。

Answer 2

这对你有用吗？

UPDATE alldistros
SET name = "CatMan"
from alldistros t1 
LEFT join origin t2 on t1.name=t2.name
LEFT join desktop t3 on t2.name=t3.name
LEFT join beginnerdistributions t4 on t3.name=t4.name
LEFT join oldcomputers t5 on t4.name=t5.name
LEFT join multimedia t6 on t5.name=t6.name
WHERE t1.name = 'Absolute LInux'

也许我错误地阅读了这个问题，您是否想要更新名称所在的所有表名称列？

SQL如何更新左连接表？

2 个答案: