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

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