Truncate all tables in a MySQL database in one command?

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Is there a query (command) to truncate all the tables in a database in one operation? I want to know if I can do this with one single query.

Drop (i.e. remove tables)
mysql -Nse 'show tables' DATABASE_NAME | while read table; do mysql -e "drop table $table" DATABASE_NAME; done
Truncate (i.e. empty tables)
mysql -Nse 'show tables' DATABASE_NAME | while read table; do mysql -e "truncate table $table" DATABASE_NAME; done

How to truncate all tables in MySQL?, Truncate (i.e. empty tables). mysql -Nse 'show tables' DATABASE_NAME | while read table; do mysql -e "truncate table $table"  The following MySQL query will itself produce a single query that will truncate all tables in a given database. It bypasses FOREIGN keys: SELECT CONCAT( 'SET FOREIGN_KEY_CHECKS=0; ', GROUP_CONCAT(dropTableSql SEPARATOR '; '), '; ', 'SET FOREIGN_KEY_CHECKS=1;' ) as dropAllTablesSql FROM

truncate multiple database tables on Mysql instance

SELECT Concat('TRUNCATE TABLE ',table_schema,'.',TABLE_NAME, ';') 
FROM INFORMATION_SCHEMA.TABLES where  table_schema in ('db1_name','db2_name');

Use Query Result to truncate tables

Note: may be you will get this error:

ERROR 1217 (23000): Cannot delete or update a parent row: a foreign key constraint fails

That happens if there are tables with foreign keys references to the table you are trying to drop/truncate.

Before truncating tables All you need to do is:

SET FOREIGN_KEY_CHECKS=0;

Truncate your tables and change it back to

SET FOREIGN_KEY_CHECKS=1;

Truncate all tables in a MySQL database in one command , In this post, I am sharing one script to generate TRUNCATE TABLE script for all tables of MySQL Database Server. Generally, Database  In this post, I am sharing one script to generate TRUNCATE TABLE script for all tables of MySQL Database Server. Generally, Database Developer creates a testing tables in development or report database server and even sometimes it is required to TRUNCATE all tables of a database.

Use phpMyAdmin in this way:

Database View => Check All (tables) => Empty

If you want to ignore foreign key checks, you can uncheck the box that says:

[ ] Enable foreign key checks

You'll need to be running atleast version 4.5.0 or higher to get this checkbox.

Its not MySQL CLI-fu, but hey, it works!

MySQL: How to TRUNCATE all Tables of a Database?, Using password Below command helpful. mysql -Nse 'show tables' DATABASE -​uMYUSER -pMYPASSWORD | while read table; do mysql -e "truncate table  That happens if there are tables with foreign keys references to the table you are trying to drop/truncate. Before truncating tables All you need to do is: SET FOREIGN_KEY_CHECKS=0; Truncate your tables and change it back to. SET FOREIGN_KEY_CHECKS=1;

MS SQL Server 2005+ (Remove PRINT for actual execution...)

EXEC sp_MSforeachtable 'PRINT ''TRUNCATE TABLE ?'''

If your database platform supports INFORMATION_SCHEMA views, take the results of the following query and execute them.

SELECT 'TRUNCATE TABLE ' + TABLE_NAME FROM INFORMATION_SCHEMA.TABLES

Try this for MySQL:

SELECT Concat('TRUNCATE TABLE ', TABLE_NAME) FROM INFORMATION_SCHEMA.TABLES

Adding a semicolon to the Concat makes it easier to use e.g. from within mysql workbench.

SELECT Concat('TRUNCATE TABLE ', TABLE_NAME, ';') FROM INFORMATION_SCHEMA.TABLES

mysql: truncate all tables in one command line · GitHub, Truncate all tables in a MySQL database in one command? mysql -Nse 'show tables' DATABASE_NAME | while read table; do echo "drop table $table;"; done  The MySQL TRUNCATE TABLE statement allows you to delete all data in a table. Logically, the TRUNCATE TABLE statement is like a DELETE statement without a WHERE clause that deletes all rows from a table, or a sequence of DROP TABLE and CREATE TABLE statements.

I found this to drop all tables in a database:

mysqldump -uUSERNAME -pPASSWORD --add-drop-table --no-data DATABASENAME | grep ^DROP | mysql -uUSERNAME -pPASSWORD DATABASENAME

Usefull if you are limited by hosting solution (not able to drop a whole database).

I modified it to truncate the tables. There is no "--add-truncate-table" for mysqldump, so i did:

mysqldump -uUSERNAME -pPASSWORD --add-drop-table --no-data DATABASENAME | grep ^DROP | sed -e 's/DROP TABLE IF EXISTS/TRUNCATE TABLE/g' | mysql -uUSERNAME -pPASSWORD DATABASENAME

works for me --edit, fixing a typo in the last command

Truncate all tables in a MySQL database in one command?, In MySQL we created a database then tables inside that database, but in SQL*​Plus we just Truncate table table_name; — It truncates data from one table. TRUNCATE [TABLE] tbl_name. TRUNCATE TABLE empties a table completely. It requires the DROP privilege. Logically, TRUNCATE TABLE is similar to a DELETE statement that deletes all rows, or a sequence of DROP TABLE and CREATE TABLE statements. To achieve high performance, TRUNCATE TABLE bypasses the DML method of deleting data.

How to truncate all tables in MySQL, The MySQL TRUNCATE TABLE statement allows you to delete all data in a because it drops and recreates the table instead of deleting rows one by one. Logically, TRUNCATE TABLE is similar to a DELETE statement that deletes all rows, or a sequence of DROP TABLE and CREATE TABLE statements. To achieve high performance, it bypasses the DML method of deleting data. Thus, it cannot be rolled back, it does not cause ON DELETE triggers to fire,

MySQL TRUNCATE TABLE By Practical Examples, In order to truncate all tables in your database you must first remove all the foreign key The below script accomplishes this in an automated fashion, The differences between Truncate and Delete commands Truncate vs. Method #1: Empty database with root user. In order to use this procedure you must have the drop and create database privilege (otherwise you will drop database but not able to create it again). Login as MySQL root or admin user to drop atomstore database: $ mysql -u root -p.

Truncate all tables in a SQL Server database, This MySQL tutorial explains how to use the MySQL TRUNCATE TABLE The TRUNCATE TABLE statement is used to remove all records from a table in MySQL. one more example where we prefix the table name with the database name. The SQL TRUNCATE TABLE command is used to delete complete data from an existing table. You can also use DROP TABLE command to delete complete table but it would remove complete table structure form the database and you would need to re-create this table once again if you wish you store some data.

Comments
  • Truncate all tables? do you meant truncate all columns of all tables in a database? What query language is this in? (e.g. SQL, MySQL, Oracle, Postgres, etc)
  • Im not sure I would recommend doing this as you could very easily get yourself into trouble. Is there a reason why you cant just script the truncates and run the script?
  • thanks 4 the reply but only reason not scripting it is running short of time so thought of runnind a query in mysql
  • ya its in mysql..and query means something similar to truncate table table_name..here i want to truncate all rows of all tables in my db in one query
  • You can use Information_Schema with a cursor. Not sure about MySql, but it should support Information_Schema.Tables
  • Yup, clean, ty. But you might need to run this with -uUSER -pPASSWORD. Also you might have to run it multiple times if you have FK withou delete on cascade.
  • If you run into FK problems such as "Cannot delete or update a parent row: a foreign key constraint fails", be sure to disable foreign key checks by modifying the command as follows: mysql -e "SET FOREIGN_KEY_CHECKS = 0; drop table $table" DATABASE_NAME
  • No need to loop the mysql client though. Take it out of the loop like this: mysql -Nse 'show tables' DATABASE_NAME | while read table; do echo "drop table $table;"; done | mysql DATABASE_NAME
  • @TylerCollier you need a .my.cnf
  • Don't know why but this code threw a Syntax Error when applied!
  • This is probably the best solution if you have a user and password for your database, and you don't want to type them visibly in your shell.
  • Upvoted because this solution requires only DB access and not SSH access. In addition it's OS-independent.