sqlServer——多表联合修改

tableName1:
kcdm  代码
kcmc  名称

tableName2 
kcdm  代码
kcmc  名称

需求：根据tableName1中kcdm字段查询tableName2表中tableName1.kcdm = tableName2.kcdm 的 kcmc填充到tableName1中

update tableName1 set kcmc = (SELECT a.kcmc from tableName2 a where a.kcdm = TP_GLOBAL_JNKC.kcdm);

参考：https://blog.csdn.net/heqinghua217/article/details/52998090