truncate table because it is being referenced by a foreign key constraint code example

Example 1: cannot truncate a table referenced in a foreign key constraint

SET FOREIGN_KEY_CHECKS = 0; 
TRUNCATE table $table_name; 
SET FOREIGN_KEY_CHECKS = 1;

Example 2: how to truncate table with foreign key constraint

SET FOREIGN_KEY_CHECKS = 0;
TRUNCATE table1;