SQL 更新 - 多列

Question

我想使用 Select 根据第二个表中的值更新表中的多个列语句来获取这样的值:

UPDATE tbl1 
SET (col1, col2, col3) = (SELECT colA, colB, colC 
                          FROM tbl2 
                          WHERE tbl2.id = 'someid') 
WHERE tbl1.id = 'differentid'

但是，似乎不可能“设置”多个列名称 - 是否有替代方法而不是为每一列编写单独的更新语句？

UPDATE tbl1 
SET col1 = (SELECT colA FROM tbl2 WHERE tbl2.id = 'someid') 
WHERE tbl1.id = 'differentid'

UPDATE tbl1 
SET col2 = (SELECT colB FROM tbl2 WHERE tbl2.id = 'someid') 
WHERE tbl1.id = 'differentid'

UPDATE tbl1 
SET col3 = (SELECT colC FROM tbl2 WHERE tbl2.id = 'someid') 
WHERE tbl1.id = 'differentid'

Answer 1

update tbl1
set col1 = a.col1, col2 = a.col2, col3 = a.col3
from tbl2 a
where tbl1.Id = 'someid'
and a.Id = 'differentid'