Does Rowcount work with Nocount?
We can use the @@ROWCOUNT function to get the number of affected rows in SQL Server. The NOCOUNT ON function does not have any impact on the @@ROWCOUNT function.
What is SQL Nolock?
The NOLOCK hint allows SQL to read data from tables by ignoring any locks and therefore not get blocked by other processes. This can improve query performance by removing the blocks, but introduces the possibility of dirty reads. Read further to better understand the use of NOLOCK.
What is @@ rowcount?
Usage. SQL Server @@ROWCOUNT is a system variable that is used to return the number of rows that are affected by the last executed statement in the batch.
What is Trancount?
@@TRANCOUNT returns the count of open transactions in the current session. It increments the count value whenever we open a transaction and decrements the count whenever we commit the transaction. Rollback sets the trancount to zero and transaction with save point does to affect the trancount value.
How can we improve the performance of a stored procedure in SQL Server?
- Specify column names instead of using * in SELECT statement. Try to avoid *
- Avoid temp temporary table. Temporary tables usually increase a query’s complexity.
- Create Proper Index. Proper indexing will improve the speed of the operations in the database.
- Use Join query instead of sub-query and co-related subquery.
Is it good to use Nolock in SQL Server?
How many indexes are too many?
there is no ‘magic number’. Every index after 0 slows down insert/updates a bit, but that shouldn’t stop you from creating needed indexes. 37 does sound like a lot, make sure you’re not using unnecessary indexes. For example, usually if you have an index on columns A, B you don’t need a separate index on A.
Is Rowcount deprecated?
Rowcount is deprecated in SQL Server 2008. If you are writing new code do not use rowcount but use TOP instead.
What does @@ Trancount do in SQL?
@@TRANCOUNT returns the count of open transactions in the current session. It increments the count value whenever we open a transaction and decrements the count whenever we commit the transaction.
What is the use of set Xact_abort on?
When SET XACT_ABORT is ON, if a Transact-SQL statement raises a run-time error, the entire transaction is terminated and rolled back. When SET XACT_ABORT is OFF, in some cases only the Transact-SQL statement that raised the error is rolled back and the transaction continues processing.
How many indexes is too much?
Can I have too many indexes Why?
The reason that having to many indexes is a bad thing is that it dramatically increases the amount of writing that needs to be done to the table. This happens in a couple of different places. When a write happens the data first is logged to the transaction log.