mysql的sql经典写法收录_MySQL

表关联更新:

UPDATE user_bank a INNER JOIN bank AS b

ON a.bank_code = b.bank_code

SET a.bank_type =b.id WHERE a.bank_type IS NULL AND a.id=1650;

更新前的查询：

select * from user_bank where id = 1650;

select * from user_bank where bank_type is null;

select count(*) from user_bank where bank_type is null;

select * from bank;

select * from bank where bank_code = '03010000';