Mysql存储过程示例

MySQL存储过程创建示例

DELIMITER //
CREATE PROCEDURE
BEGIN
declare count int;
SELECT count(*) into count
FROM goods gd
inner join recommend rec on rec.object_id = gd.goods_id
where 1=1 and info_state='1' and is_del='1' and is_up='0' and rec.type_code = '33';

if count = 0 then
select tb2.* from (SELECT goods_id,gd.goods_name,goods_no,list_img as img,list_img
FROM goods gd
where 1=1 and info_state='1' and is_del='1' and is_up='0' and gd.goods_id not in (
SELECT goods_id
FROM goods gd
inner join recommend rec on rec.object_id = gd.goods_id
where 1=1 and info_state='1' and is_del='1' and is_up='0' and rec.type_code = '33' )
order by gd.in_date desc limit 4) as tb2;
elseif count = 1 then
select tb1.* from (SELECT goods_id,rec.title as goods_name,goods_no,rec.img,list_img
FROM goods gd
inner join recommend rec on rec.object_id = gd.goods_id
where 1=1 and info_state='1' and is_del='1' and is_up='0' and rec.type_code = '33'
order by rec.sort) as tb1
union
select tb2.* from (SELECT goods_id,gd.goods_name,goods_no,list_img as img,list_img
FROM goods gd
where 1=1 and info_state='1' and is_del='1' and is_up='0' and gd.goods_id not in (
SELECT goods_id
FROM goods gd
inner join recommend rec on rec.object_id = gd.goods_id
where 1=1 and info_state='1' and is_del='1' and is_up='0' and rec.type_code = '33' )
order by gd.in_date desc limit 3) as tb2;
elseif count = 2 then
select tb1.* from (SELECT goods_id,rec.title as goods_name,goods_no,rec.img,list_img
FROM goods gd
inner join recommend rec on rec.object_id = gd.goods_id
where 1=1 and info_state='1' and is_del='1' and is_up='0' and rec.type_code = '33'
order by rec.sort) as tb1
union
select tb2.* from (SELECT goods_id,gd.goods_name,goods_no,list_img as img,list_img
FROM goods gd
where 1=1 and info_state='1' and is_del='1' and is_up='0' and gd.goods_id not in (
SELECT goods_id
FROM goods gd
inner join recommend rec on rec.object_id = gd.goods_id
where 1=1 and info_state='1' and is_del='1' and is_up='0' and rec.type_code = '33' )
order by gd.in_date desc limit 2) as tb2;
elseif count = 3 then
select tb1.* from (SELECT goods_id,rec.title as goods_name,goods_no,rec.img,list_img
FROM goods gd
inner join recommend rec on rec.object_id = gd.goods_id
where 1=1 and info_state='1' and is_del='1' and is_up='0' and rec.type_code = '33'
order by rec.sort) as tb1
union
select tb2.* from (SELECT goods_id,gd.goods_name,goods_no,list_img as img,list_img
FROM goods gd
where 1=1 and info_state='1' and is_del='1' and is_up='0' and gd.goods_id not in (
SELECT goods_id
FROM goods gd
inner join recommend rec on rec.object_id = gd.goods_id
where 1=1 and info_state='1' and is_del='1' and is_up='0' and rec.type_code = '33' )
order by gd.in_date desc limit 1) as tb2;
else
SELECT goods_id,rec.title as goods_name,goods_no,rec.img,list_img
FROM goods gd
inner join recommend rec on rec.object_id = gd.goods_id
where 1=1 and info_state='1' and is_del='1' and is_up='0' and rec.type_code = '33'
order by rec.sort;
end if;
END

创建结束后，进行call存储过程进行调用。
call getNewGoods();