如何使用“ where子句”更新单个mysql表中的许多字段？

Question

我有具有相同字段的表，想通过where子句更新该字段，

update tmp_aus_inv_data
SET cust_region= "ROTOMOULD"
WHERE division = "ROTOMOULD" ;

update tmp_aus_inv_data
SET cust_region= "Internal"
WHERE division = "EXTRUSION" and ucase(cust_region) like ucase('Internal%') ;

我尝试了这个，但是没有用，

update tmp_aus_inv_data
(set cust_region= "ROTOMOULD"),
(SET cust_region= "Internal")
WHERE division = "ROTOMOULD"  and WHERE division = "EXTRUSION" and ucase(cust_region)     like ucase('Internal%') ;

Answer 1

您可以在UPDATE使用CASE语句，所以我想您需要这样的东西：

update tmp_aus_inv_data
SET cust_region 
    = case 
        when division = "ROTOMOULD" then "ROTOMOULD"
        when division = "EXTRUSION" 
            and ucase(cust_region) like ucase('Internal%')
          then "Internal"
        else cust_region
      end
 where division in ("ROTOMOULD", "EXTRUSION")

参见带有演示的SQL Fiddle

Answer 2

能否请您尝试以下查询一次。

UPDATE tmp_aus_inv_data
   SET `cust_region`= if(`division`= 'ROTOMOULD', 'ROTOMOULD', 'Internal') 
WHERE division in ('ROTOMOULD','EXTRUSION');