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How to restrict the update of certain columns?
Only allow stored procedure to update those columns – Database Administrators Stack Exchange Restrict update on certain columns. Only allow stored procedure to update those columns I have sensitive price columns that I would like to have updated only through a stored procedure.
Is it safe to update all rows in a table?
Performing DML operations through tested application are always safe and efficient. This process also prevents an accidental update or delete of all rows in a table. In my environment, I have a couple of tables that often require ad-hoc updates of certain values or delete of certain rows.
How to prevent a DML update or delete?
It is a good idea to prevent accidental DML operations which may affect an entire table. For both accidental UPDATE or DELETE prevention, we make use of triggers in this tip. A new trigger may be created and if a trigger is already defined on the table then it may be altered to embed prevention logic.
What happens if auto update of Statistics is turned off?
If auto update of statistics is turned off, the rows count still should be accuratein dbo.sysindexes table and the sys.dm_db_partition_stats DMV. The trigger logic outlined in this tip could also be used for partitioned tables.
Do you update only changed fields in SQL?
If you know for sure you only have to update a few columns, then just pass those updated values back and not the entire row. So you are saying not to use a stored procedure but inline SQL that I generate in the code for only the changed columns? Also, to clarify, the locking is not the concern of the client per se.
What happens when you update a row in MSDN?
When an update occurs, the entire row (disregarding lock escalation here) is locked and not just the updated column (s). Spending time sorting through each value might actually cost you more, especially if you have to requery the table for the current values.
Is there a good way to implement this restriction?
The update trigger will check if the token exists in the token table for the updated row. If found, it would continue. if the token is not found, it will throw an exception and make the update transaction fail. Is there a good/better way to implement this restriction? SQL Server allows column-level permissions. Just for example: