mysql儲存過程簡單示例

create

procedure
testp4
(in a int,in b int,out c int,out d int
)begin
setc = a+b;
select count(attribution) into d from credit_card;
endcall testp4(1,2,@s,@m);
select @s,@m;

select * from product a join (select id from product limit 866613, 20) b on a.id = b.id

alter

table
`tablename`
add`updateat`
timestamp
null
onupdate
current_timestamp;

update seckill.seckill a set a.end_time =  date_sub(now(),interval -2

day) -- 具體可搜尋mysql日期時間函式

create

trigger lasttime 
after
update
on myaccount.credit_card 
foreach
rowbegin
update seckill set a=1
where id = new/old.id ;
end;
new是新新增行資料的指代，old是修改前的行資料指代

mysql儲存過程示例

create procedure pro cancel order in orderid int in userid int out resultstatus int comment 取消商品訂單 begin 引數說明 orderid 訂單id extras 擴充套件記錄 異常處理 declare ...

MySQL儲存過程示例

mysql儲存過程 自定義結束符 delimiter 如果存在同名的儲存過程就刪除 drop procedure if exists praddblack 建立儲存過程 create procedure praddblack in n int begin while n 999 do insert ...

mysql 儲存過程示例

在mysql的test庫中執行如下sql table structure for user drop table if exists user create table user id int 11 unsigned not null auto increment,tinyint 1 not nul...