How can I empty the contents of all tables in my database in phpMyAdmin without dropping any of the tables in the database?
Since I do this several times an hour while in development, I'd rather not individually click "Empty" on all 60+ tables every time.
IMHO the easiest solution is:
Create a SQL script with multiple DELETE statements (one for each table) and execute it.
Get into phpMyAdmin and select the database that you want. Select the SQL tab and paste the SQL script into the window. Hit Go.
Look here too:
We can truncate all tables data by phpMyAdmin actually!
In phpMyAdmin, you can do it as following steps:
1) select u DB and do Export operation as this way:
select Custom Export method
By this step, phpMyAdmin helps us create one sql script of full list of all tables
3) do Import operation to delete and create each blank table one by one by this script
you could start with this query
SELECT T.*
FROM INFORMATION_SCHEMA.tables T
WHERE T.table_type = 'BASE TABLE'
And iterate through those results to build a dynamic SQL string to the tune of 'DELETE FROM ' + T.Table_Name
Unfortunately, there is no TRUNCATE DATABASE or equivalent. With that said, you could probably use some kind of stored procedure that go through all tables in your database and truncate them. I found something of that kind here, but I don't know whether it works. (You should probably read the comment discussion too)
You can delete all data from phpmyadmin function easily. Maybe this feature didn't exists during 2010 when this question was posted, but I feel all beginners can refer to this.
The TRUNCATE TABLE statement will empty a table completely (MySql 3.23 and above).
You can create a script that you can reuse for a particular database. It's not generic but saves you from creating a new database + login each time you want to start with a fresh db.
Here's how to create a script yourself:
In your webbrowser go to phpMyAdmin and select the database. Click the SQL tab and execute 'SHOW TABLES'.
Choose the printerfriendly format and copy the contents to a text editor.
Now for each table name you re-write it in the format:
TRUNCATE TABLE <tablename>;
note: You can use a regular expression if you have many tables
You could export the table structures only like this:
mysqldump -u root -p --no-data mydb > backup_info.sql
then drop the whole database, recreate it and restore from the backup.
Easy enough to script the whole thing.
drop procedure if exists truncate_tables;
delimiter #
create procedure truncate_tables()
begin
declare tab_name varchar(64);
declare done tinyint unsigned default 0;
declare table_cur cursor for select t.table_name
from
information_schema.schemata s
inner join information_schema.tables t on s.schema_name = t.table_schema
where
s.schema_name = database() and t.table_type = 'BASE TABLE';
declare continue handler for not found set done = 1;
open table_cur;
repeat
fetch table_cur into tab_name;
set @cmd = concat('truncate table ', tab_name);
prepare stmt from @cmd;
execute stmt;
until done end repeat;
close table_cur;
end #
Actually, went deeper and wrote this:
SET @command:='';
SELECT @command:=CONCAT(@command, 'TRUNCATE TABLE ',T.TABLE_NAME,';')
FROM INFORMATION_SCHEMA.tables T
WHERE T.table_type = 'BASE TABLE' AND T.table_schema='YOUR_TABLE_SCHEMA';
PREPARE bye_world FROM @command;
EXECUTE bye_world;
DEALLOCATE PREPARE bye_world;
It selects all table names from provided schema YOUR_TABLE_SCHEMA and puts them into a @command user variable, forming a query for each one like this: TRUNCATE TABLE TABLE_NAME;
Then i just prepare selected statement and execute it. Note, that you must declare user variable before query, or it will be 0 and mess up our statement.
Using MySQL DROP TABLE To Remove Existing Tables
