mysql數據經常使用知識點

  //設置表自增初始值

alter table users AUTO_INCREMENT=10000;

//mysql經過關聯字段同步兩張表的字段內容

update table_name1 a
set a.content = (select b.content from table_name2 b where a.key= b.key)
where exists (select 1 from table_name2 c where a.key= c.key);