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mysql update注意
drop table a;
CREATE TABLE IF NOT EXISTS a (id int,员工 Nvarchar(10),年龄 int,职业 nvarchar(10)) ;
insert a select 1, '001', 18 ,'教授' ;
insert a select 2, '002' , 18 , '教授' ;
insert a select 3, ...
【解决】You cant specify target table table name for update in FROM clause
转。
mysql> UPDATE EACONTACTGROUPS A
SET GROUPNAME=(SELECT CONCAT(B.GROUPNAME,'-',A.GROUPNAME) FROM EACONTACTGROUPS B WHERE B.CORPID=A.CORPID AND B.USERID=A.USERID AND B.GROUPID=A.PARENTGROUPID)
WHE ...