如何使用“where子句”更新单个mysql表中的多个字段？

Question

我有相同字段的表，想要使用where子句更新那些字段，

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%') ;

我试过这个，但没有工作，

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CASE中使用UPDATE语句，因此我认为您需要这样的内容：

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")

请参阅SQL Fiddle with Demo

Answer 2

您能否请一次尝试以下查询。

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