MySQL puzzle: How to combine result in Loop? - mysql

Question

So far I have tried using CREATE VIEW <view_table_name> and
CREATE TABLE <table_name> and CREATE TEMPORARY <temporary_table_name>
and this methods are taking so much time because I have to (step 1) create a table and (step 2) insert a data. Then (step 3) select the created table. Finally, (step 4) drop the table.
This is my procedure: (My program doesn't look make any sense, I mean why am I doing this. The answer to your confusion is, this is just a part of my large code and I made it this way so that it may look simple.)
BEGIN
-- Main loop variables
DECLARE col_Name varchar(255);
DECLARE col_Description varchar(255);
-- Main Loop
Block2: BEGIN
DECLARE done BOOLEAN DEFAULT FALSE;
DECLARE statement CURSOR FOR SELECT `name`, `description` FROM `rules`;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
OPEN statement;
REPEAT
MainLoop: LOOP
FETCH statement INTO col_Name, col_Description;
IF done THEN
LEAVE MainLoop;
END IF;
SELECT col_Name AS `Name`, col_Description AS `Description`;
END LOOP MainLoop;
UNTIL done END REPEAT;
CLOSE statement;
END Block2;
-- End of Main Loop
END
The result is:
The problem:
The result is separate. How do I combine this result into one table?

Answer 1

Declare a temporary table at the beginning ,populate data into temp table and then access it after loop ends
BEGIN
-- Main loop variables
DECLARE col_Name varchar(255);
DECLARE col_Description varchar(255);
create temporary table yourtable (name varchar(50),description varchar(50));
-- Main Loop
Block2: BEGIN
DECLARE done BOOLEAN DEFAULT FALSE;
DECLARE statement CURSOR FOR SELECT `name`, `description` FROM `rules`;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
OPEN statement;
REPEAT
MainLoop: LOOP
FETCH statement INTO col_Name, col_Description;
IF done THEN
LEAVE MainLoop;
END IF;
insert into yourtable(name,description)
values (col_Name, col_Description)
END LOOP MainLoop;
UNTIL done END REPEAT;
CLOSE statement;
select * from yourtable
END Block2;
-- End of Main Loop
END

Answer 2

I think things can be easier.
you don't have to use a cursor, you just need to create an empty table in your procedure, and input the result from your query.
like below:
CREATE DEFINER=`root`#`localhost` PROCEDURE `temp`(val int)
BEGIN
DECLARE yourval datatype()
-- declare as many as you need.---
set #beginning = 0
set #ending = val
-- how many time do you need to repeat your code?
---CREATE AN EMPTY TABLE HERE---
while #beginning < #ending do
insert table TableCreatedAbove
---YOUR QUERY---
---YOU MAY NEED TO DO SOMETHING WITH YOUR DECLARED VARIABLE---
set #beginning = #beginning + 1;
end while;
commit;
END
when you need to use your combined table, just
select * from TableCreatedAbove
maybe you already solved your problem in somewhere else, but here is my answer.