Popular tips

How do I detach and reattach a SQL database?

How do I detach and reattach a SQL database?

Using SQL management studio:

  1. Configure the database to run in single user mode by going to the database properties->option->restrict access (Figure 2)
  2. Right click the database name->tasks->detach and click OK on the database detach window.
  3. Right click databases->attach->add and point to the mdf file.

How do I stop SQL Server update statistics?

If you want to stop auto-update for any particular statistics you can simply do that by running the following syntax. UPDATE STATISTICS SchemaName. TableName WITH FULLSCAN, NORECOMPUTE; The above syntax will fully update statistics and also will disable the future statistics update by auto-update statistics.

Does SQL Server update statistics automatically?

SQL Server uses the following method to update statistics automatically. For the large tables, we require to update 20% of a row to auto-update the statistics. For example, a table with 1 million rows requires 20,000 rows updates. It might not be suitable for the query optimizer to generate an efficient execution plan.

How do I detach a database in SQL Server 2008?

To detach a database

  1. In SQL Server Management Studio Object Explorer, connect to the instance of the SQL Server Database Engine and then expand the instance.
  2. Expand Databases, and select the name of the user database you want to detach.
  3. Right-click the database name, point to Tasks, and then click Detach.

How to perform update Statistics in SQL Server?

SQL Server requires scanning the entire table for SQL Server update statistics, and it causes issues for the large tables. It is also valid for a table with partitioning as well. We can use this feature to update only the partition that we require to update. By default, Auto Create Incremental is disabled for individual databases.

How to find outdated statistics in SQL Server 2008?

–Create a table for the outdated statistics CREATE TABLE Outdated_statistics ( [Table name] sysname, [Index name] sysname, [Last updated] datetime NULL, [Rows modified] int NULL) GO Now we will query every statistics object which was not updated in the last day and has rows modified since the last update.

What to check when detaching database from SQL Server?

You can see the parameter @skipchecks = false in this query. In the detach database window, we put a check on Update Statistics. This option specifies whether SQL Server to update statistics or not before detaching the database.

Do you need to disable Auto update Statistics in SQL?

We should not disable the auto-update statistics even we are regularly updating the SQL Server Statistics. Auto Update Statistics allows SQL Server to automatically update stats according to the predefined threshold Updating statistics with FULL SCAN might take longer for an extensive data set object. We should plan it and do it off business hours