DELIMITER //
CREATE PROCEDURE GetAllProducts()
BEGIN
declare count int;
select count(*) into count from shopcar where openid=open_id and item_no=itemno;
if(count=0)
then
insert into shopcar (openid,item_no,item_num) values (open_id,itemno,itemnum);
else
update shopcar set item_num=item_num+itemnum where openid=open_id and item_no=itemno;
end if;
END //
CREATE PROCEDURE GetAllProducts()
BEGIN
declare count int;
select count(*) into count from shopcar where openid=open_id and item_no=itemno;
if(count=0)
then
insert into shopcar (openid,item_no,item_num) values (open_id,itemno,itemnum);
else
update shopcar set item_num=item_num+itemnum where openid=open_id and item_no=itemno;
end if;
END //
DELIMITER ;
BEGIN
#定义一个变量来保存该记录是否存在
declare num int;
#这条sql,就是查询对应的记录有多少条,注意 into num 这两句话,就是把count(*) 查出的值,赋给到num中
select count(*) into num from t_count_view where TO_DAYS(now())=TO_DAYS(day);
#接下来的就是判断了,注意,判断是否等于,只有一个等于号
if(num=0)
#等于号之后,还要写一个Then,代表条件成立后要执行的sql
Then
insert into t_count_view(view_people,view_num,day)values(1,1,now());
#else可以直接用,不需要加then
else
update t_count_view set view_people=view_people+1;
#但是当if使用完之后,一定要写end if,代表着if的条件判断结束了
end if;
END