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;
Related
I am using laravel framework for developing APIS , i have a challenging situation while executing my current query at that time i have to create temporary table with some columns and i have to insert some data based on current running query column values,can anyone please give me some idea how to acheive this one?
$q = user::query();
//some joins and where conditions stuff is there here
$q->addselect(“col1 as UserName”)
if($data[“name”]==“test”){
DB::statement('CREATE TEMPORARY TABLE temp SELECT ...i want to insert UserName value here in my temp table column called tempCol');
}
$q->paginate();
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
I have been working on a pretty large database this last week. Basically I am taking an Access database and converting it to a MySQL database. I have seccessfully converted all the tables and views to MySQL. However I have a view that requires input from the user, the date. The other view is the view that will be call.
view 1 - compiled_fourweeks - needs date
view 2 - metrics_fourweeks - uses `compiled_fourweeks in query.
I was thinking of a precedure but I won't be able to reference the columns in the query.
I am kind of running out of ideas at this point.
If I understand correctly, you need to execute a view (metrics_fourweeks) that needs data from another view (compiled_fourweeks), and this last view requires input from the user.
I would go with the procedure approach:
create procedure fourWeeksData(d date)
create or replace view compiled_fourweeks
select ...
from ...
where recordDate = f -- Just an example; use whichever where clause you need
...;
select * from metrics_fourweeks;
end
If your database will be used just by a single user, your problem is solved. But if your database is meant to be used by more than one user... well, you can use temporary tables:
create procedure fourWeeksData2(d date)
drop table if exists temp_compiled_fourweeks;
create temporary table temp_compiled_fourweeks
select ...
from ...
where recordDate = f -- Just an example; use whichever where clause you need
...;
-- You will need to create the required indexes for this new temp table
-- Now replicate the SQL statement, using your new temp table
select ...
from temp_compiled_fourweeks
...;
end
Hope this helps you.
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;
I run this query
CREATE TEMPORARY TABLE usercount SELECT * FROM users
I get this message
Your SQL query has been executed successfully ( Query took 0.1471 sec )
But when I try to access the newly created table using
SELECT * FROM usercount
I get this error
#1146 - Table 'abc_site.usercount' doesn't exist
Not sure why, I need to mention that I've did a good share of googling beforehand.
My version of PHPMyAdmin is 3.5.2.2 and MySQL 5.5.27
PHPMyAdmin (or rather PHP) closes the database connection after each screen. Thus your temporary tables disappear.
You can put multiple SQL statements in the SQL query box in PHPMyAdmin; this should be executed as one block and thus the temporary table is not deleted.
Temporary tables are temparar and after use thay Delete.
for example ,when insert data into database , first we can insert into temp table and thus when complete transaction , then insert into main table.
EXAMPLE :
//------------------------------------------
CREATE TEMPORARY TABLE TEMP
(
USERNAME VARCHAR(50) NOT NULL,
PASSWORD VARCHAR(50) NOT NULL,
EMAIL varchar(100),
TYPE_USER INT
);
INSERT INTO TEMP VALUES('A','A','A','1');
SELECT * FROM TEMP
//-----------------------------------------
Show A,A,A,1