empty all tables mysql code example

Example 1: mysql empty a table

-- If you do not need a condition or limit the rows:
TRUNCATE TABLE tblYourTable; -- Not Foreign key constrained

-- Or

SET FOREIGN_KEY_CHECKS = 0;

TRUNCATE YourTable1;
TRUNCATE YourTable2;

SET FOREIGN_KEY_CHECKS = 1;

-- --------------------------------------------------------
-- Otherwise:
DELETE FROM tblYourTable WHERE condition;

-- Or

DELETE FROM tblYourTable LIMIT row_count;

Example 2: how to truncate all table in mysql workbench

SELECT
    Concat('TRUNCATE TABLE ', TABLE_NAME)
FROM
    INFORMATION_SCHEMA.TABLES
WHERE
    table_schema = 'db_name';

Example 3: truncate all tables

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