Delete all data from SQL table if it is in any relation with other table

If you directly delete data then an error show regarding foreign key then you should use this query

this query will remove all relation then delete data then again create relation as same as previously

--EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'

--EXEC sp_MSForEachTable 'DELETE FROM Employee ' --Delete all data from all tables

----EXEC sp_MSForEachTable 'DROP TABLE ProjectProduct' --Delete all table from database

--EXEC sp_MSForEachTable 'ALTER TABLE ? CHECK CONSTRAINT ALL'