1.插入的數據來源自其他表
insert into A(id,cola) select id,cola from B where colb>1000
2.插入時排除(忽略)重複記錄
insert ignore into A(id,cola) select id,cola from B where colb>1000
3.插入時遇到重複記錄做更新操作
insert into A(id,cola) select id,cola from C on duplicate key update A.cola=C.cola