如何在mysql中基于另一个表更新表? [英] how to update table based on another table in mysql?
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问题描述
我有2张桌子作为休假:
i have 2 tables as fallow:
users
zip state city
89012
45869 0
....
zips
zip state city
89012 NV lv
45869 MI ca
....
我想基于users
表中的zip
用zips
中的state and city
更新users: state and city
i would like to update users: state and city
with the state and city
from zips
based on the zip
from the users
table in an efficient way
users
表中的city
为空,但state
也可以为0
或空
the city
in users
table is empty but the state
can also be 0
or empty
有什么想法吗?
谢谢
推荐答案
您是否要批量更新所有现有行?
Are you trying to update all of the existing rows in bulk?
如果是这样,这是进行更新的一种方法:
If so, here's one way to do the update:
update users u
inner join zips z on z.zip = u.zip
set u.state = z.state,
u.city = z.city;
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