SQL procedure - Multiple value - mysql

Question

I have this procedure :
BEGIN
DECLARE done INT DEFAULT FALSE;
DECLARE `id_var` varchar(255);
DECLARE `cur1` CURSOR FOR
SELECT `id` FROM `clients`
WHERE `status` = 'Active';
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
DROP TABLE IF EXISTS `tblquota_nc`;
CREATE TABLE IF NOT EXISTS `tblquota_nc` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`user_id` int(11) NOT NULL,
`email` varchar(255),
`pack_id` int(11) NOT NULL,
`pack_name` varchar(255) NOT NULL,
`quota` int(11) NULL,
PRIMARY KEY (`id`)
);
OPEN cur1;
read_loop: LOOP
FETCH NEXT
FROM cur1
INTO id_var;
IF done THEN
LEAVE read_loop;
END IF;
SELECT clients.id as `User ID`, `email`, `packageid` as `Pack ID`, `name` as `Pack`, (CASE
WHEN `name` = "Basic" THEN '10'
WHEN `name` = "Silver" THEN '100'
WHEN `name` = "Gold" THEN '1000'
ELSE '10'
END) as Quota INTO #mid, #mail, #p_id, #packname, #quota
FROM `clients`
INNER JOIN `tblhosting` ON clients.id = tblhosting.userid
INNER JOIN `tblproducts` ON tblhosting.packageid = tblproducts.id
WHERE clients.status = 'Active'
AND tblhosting.domainstatus = 'Active'
AND clients.id = id_var;
IF (SELECT id FROM tblquota_nc WHERE user_id = #mid) THEN
BEGIN
END;
ELSE
BEGIN
if (#mid IS NOT NULL AND #p_id IS NOT NULL AND #packname IS NOT NULL) then
INSERT INTO tblquota_nc (user_id, email, pack_id, pack_name, quota) VALUES (#mid, #mail, #p_id, #packname, #quota);
end if;
END;
END IF;
END LOOP;
CLOSE cur1;
END
It seems like I have an error because the SELECT statment return several values. I thought doing another loop with these results to make an insert into the new table. I want to make a new table from these information.
table clients:
id | email | status
----------------------------
1 | user1#mail.com | Active
2 | user2#mail.com | Inactive
3 | user3#mail.com | Active
table tblhosting
id | userid | packageid | domainstatus
------------------------------------------------
1 | 1 | 2 | Active
2 | 2 | 3 | Active
3 | 3 | 1 | Active
table tblproducts
id | name
-----------
1 | Basic
2 | Silver
3 | Gold
I expect result like :
id | user_id | email | pack_id | pack_name | quota
-----------------------------------------------------------
1 | 1 | user1#mail.com | 2 | Silver | 100
2 | 2 | user2#mail.com | 3 | Gold | 1000
3 | 3 | user3#mail.com | 1 | Basic | 10
If I put max in the case statment, it will work but will not show all data.

Answer 1

I don't think you need a stored procedure to do this. Just use CREATE TABLE ... SELECT syntax:
CREATE TABLE tblquota_nc (id INT AUTO_INCREMENT PRIMARY KEY) AS
SELECT c.id as user_id
, c.`email`
, h.`packageid` as pack_id
, p.`name` as pack_name
, (CASE WHEN `name` = "Basic" THEN '10'
WHEN `name` = "Silver" THEN '100'
WHEN `name` = "Gold" THEN '1000'
ELSE '10'
END) as quota
FROM `clients` c
LEFT JOIN `tblhosting` h ON c.id = h.userid
INNER JOIN `tblproducts` p ON h.packageid = p.id
ORDER BY c.id;
Output from SELECT * FROM tblquota_nc:
id user_id email pack_id pack_name quota
1 1 user1#mail.com 2 Silver 100
2 2 user2#mail.com 3 Gold 1000
3 3 user3#mail.com 1 Basic 10
Demo on dbfiddle