I have create mysql store procedure created a temporary table on it.Now i want to fetch all the data from temp table.How can i do this?Please help me.
Call your_sp_name; /* so data could insert into temp table*/
SELECT * FROM temp_table_name;
Related
I was trying to write a procedure and needed to copy output_1 table into a new one.
This procedure :
BEGIN
SELECT * INTO newtable FROM output_1;
END
returns the following error :Undeclared variable: newtable
I thought it would create a new table and all its columns automatically.
How do I SELECT multiple columns of a table INTO a new table using a stored procedure?
EDIT :
In stored procedures, when you want to use a table to store data temporarily, you should consider using temporary tables.
Typically, if you try to store a table in a variable, you will get a multiple rows error ; in this case, temporary tables can replace variables.
CREATE TEMPORARY TABLE new_table AS SELECT * FROM output_1;
You cannot select into a table. You possibly intended
create table newtable as select * from output_1;
https://dev.mysql.com/doc/refman/8.0/en/create-table-select.html
How to create a Temp table in teradata SQL Assistant?
I have a query that is running very slow and I want to optimize it by creating a temp table.
What I want is to be able to drop and re-create a temp table with the same name automatically anytime the query is executed in Teradata SQL assistant.
Any help would be appreciated please.
you can create a volatile table and imbibe both creation of volatile table and your query within a begin transaction and end transaction
BT;
create volatile table xxx;
your query
ET;
I am looking for Sql-Server relevant feature in MySql
Table variable inside procedure. here
Temporary Table inside procedure. here
I hope the table variables are in-memory and temporary tables are stored in temp database.
If both declared inside procedure, both will be cleaned after the procedure finished its execution.
MySql provides only one option called Temporary Table. How to achieve these two? and do we need to clear those tables or MySql will take care of it after the procedure completed?
From MySQL documentation:
You can use the TEMPORARY keyword when creating a table. A TEMPORARY table is visible only to the current session, and is dropped automatically when the session is closed. This means that two different sessions can use the same temporary table name without conflicting with each other or with an existing non-TEMPORARY table of the same name.
More info: http://dev.mysql.com/doc/refman/5.1/en/create-table.html#create-temporary-table
But what happens if I'm using a single connection? May be you will have some data conflicts. In the past I use temporary tables with a unique id to avoid conflicts if I call the procedure with the same connection more than one time:
DELIMITER $$
DROP PROCEDURE some_proc $$
CREATE PROCEDURE some_proc ()
BEGIN
-- creating a unique value
DECLARE VARIABLE tmp_uuid varchar(50);
SET tmp_uuid = uuid();
CREATE TEMPORARY TABLE IF NOT EXISTS tbl_temporary
(
uuid_id varchar(50),
col1 varchar(10),
col2 varchar(10),
INDEX(uuid_id)
);
-- do some operations on that
INSERT INTO tbl_temporary(uuid_id, ...) VALUES (tmp_uuid,...);
-- now, cleaning the data
DELETE FROM tbl_temporary WHERE uuid_id = tmp_uuid;
-- if the current session is closed the table will be automatically deleted
END$$
DELIMITER ;
I want to store the output from a PROCEDURE into a global userdefined VAR so i can use this "list" in an other PROCEDURE on a different database.
Second, if the VAR is used on the 2nd PROCEDURE it should be unset, because on next CALL it will append or?
Thanks for response!
BEGIN
SELECT `steamid` FROM `mybb_users` WHERE `steamid`!='';
END
The SELECT shout go into a global variable, so i can use the result in another procedure...
As far as I know, you can't return a row set as a result of a procedure in MySQL.
I would solve it by creating a temporary table in the first procedure, and then use that temp table in the second procedure. Something like this:
delimiter $$
create procedure procedure1()
begin
drop table if exists temp_table;
create temporary table temp_table
select steamid from mybb_users where steamid != '';
-- add the appropriate indexes here
-- alter table temp_table
-- add index ...
end $$
create procedure procedure2()
begin
-- Do whatever you want to do with temp_table
end $$
delimiter ;
Remember:
A temporary table is visible only to the connection that created it.
If the connection is closed, the temporary table will be deleted.
Temporary tables are created directly to RAM (if they are not very big), so they can be pretty fast to read.
Each connection can create temporary tables with the same name, as each connection will have a "copy" of that temp table.
I have a stored procedure which returns 110 columns, I want to insert the data coming from that stored procedure into a temp table.
Here is one solution
select *
into #tempTable
from users -- it is working fine
BUT coming to here
EXEC Sp_Users_get 12 into #tempTable
it is not working.
Please help me for solution
INSERT INTO #TempTable
EXEC Sp_Users_get 12
GO
See this, I think there may be your answer..
Select Columns from Stored Procedure Resultset
Check this out also
How to INSERT data from Stored Procedure to Table – 2 Different Methods