Clearing All Rows From All Tables

This couple of SQL statements will delete all the rows from all tables.

1. It disables referential integrity
2. DELETES or TRUNCATES each table
3. Enables referential integrity
4. Reseeds rows with identity

-- disable referential integrity
EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'
GO

EXEC sp_MSForEachTable '
IF OBJECTPROPERTY(object_id(''?''), ''TableHasForeignRef'') = 1
DELETE FROM ?
else
TRUNCATE TABLE ?
'
GO

-- enable referential integrity again
EXEC sp_MSForEachTable 'ALTER TABLE ? CHECK CONSTRAINT ALL'
GO

-- This will reseed each table [don't run this exec if you don't want all your seeds to be reset]
EXEC sp_MSForEachTable '
IF OBJECTPROPERTY(object_id(''?''), ''TableHasIdentity'') = 1
DBCC CHECKIDENT (''?'', RESEED, 0)
'
GO

Thanks to Mauro Cardarelli's post