SQL 更新 - 多列

SQL Update - Multiple Columns

提问by Prakash Chennupati

I would like to update multiple columns in a table based on values from a second table using a Selectstatement to obtain the values like this:

我想根据第二个表中的值更新表中的多个列，使用Select语句获取如下值：

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

However, it doesn't seem as though it's possible to 'SET' more than one column name - are there alternatives rather than writing separate update statements for each column?

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'

回答by Tevo D

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

回答by Arun

This should work -

这应该有效 -

    Update Tbl1 
    SET 
    Col1 = B.ColA,
    Col2 = B.ColB,
    Col3 = B.ColC
    FROM
    Tbl2 B
    Where
    B.Id = 'Someid'

回答by Ahmed Eissa

You can find the answer here.

您可以在此处找到答案。