Lists user login attempts to a SQL Server (failed and successful login attempts)

DECLARE @database nvarchar(50)
DECLARE @table nvarchar(50)
set @database = 'dotnetnuke'
set @table = 'tabs'
DECLARE @sql nvarchar(255)
WHILE EXISTS(select * from INFORMATION_SCHEMA.TABLE_CONSTRAINTS where constraint_catalog = @database and table_name = @table)
BEGIN
select @sql = 'ALTER TABLE ' + @table + ' DROP CONSTRAINT ' + CONSTRAINT_NAME
FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE constraint_catalog = @database and table_name = @table

exec sp_executesql @sql

END