sql - 使用连接更新 Informix 表

Question

这是 Informix 更新的正确语法吗？

update table1
set table1.code = 100
from table1 a, table2 b, table3 c
where a.key = c.key
a.no = b.no
a.key = c.key
a.code = 10
b.tor = 'THE'
a.group = 4183
a.no in ('1111','1331','1345')

我收到通用的 -201“发生语法错误”消息，但我看不出有什么问题。

Answer 1

你的语法错误是 table1.code

set table1.code = 100

把这个改成

set a.code = 100

完整代码

update table1
set a.code = 100
from table1 a, table2 b, table3 c
where a.key = c.key
and a.no = b.no
and a.key = c.key
and a.code = 10
and b.tor = 'THE'
and a.group = 4183
and a.no in ('1111','1331','1345')