Question

How can admin prevent himself to drop or truncate specific tables, because sometimes a table is accidently truncated or deleted, making view is not a good idea. if i make a trigger ,it is implemented in all tables in db. i just want to implement it in specific tables, in sql server ?

Answer 1

Create TRIGGER [TR_ProtectCriticalTables]
ON DATABASE 
FOR 
DROP_TABLE

AS    
DECLARE @eventData XML,
    @uname NVARCHAR(50),
    @oname NVARCHAR(100),
    @otext VARCHAR(MAX),
    @etype NVARCHAR(100),
    @edate DATETIME
SET @eventData = eventdata()
SELECT
    @edate=GETDATE(),
    @uname=@eventData.value('data(/EVENT_INSTANCE/UserName)[1]', 'SYSNAME'),
    @oname=@eventData.value('data(/EVENT_INSTANCE/ObjectName)[1]', 'SYSNAME'),
    @otext=@eventData.value('data(/EVENT_INSTANCE/TSQLCommand/CommandText)[1]', 
            'VARCHAR(MAX)'),
    @etype=@eventData.value('data(/EVENT_INSTANCE/EventType)[1]', 'nvarchar(100)')
  IF @oname IN ('tbluser')-- You can give comma seperated list here
BEGIN
DECLARE @err varchar(100)
SET @err = 'Table ' + @oname  + ' is super duper protected and cannot be dropped.'
RAISERROR (@err, 16, 1) ;
ROLLBACK;
END
GO
ENABLE TRIGGER [TR_ProtectCriticalTables] ON DATABASE 

For disabling the truncate try this

EXEC sys.sp_cdc_enable_table
@source_schema = N'dbo',
@source_name = N'TestTable',
@role_name = NULL
GO

This may cause some other problems so please check before using.