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Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Related Hot Network Questions. Question feed. Should any right be infringed, it is totally unintentional. Drop me an email and I will promptly and gladly rectify it. Custom Search. In this tutorial, we use two examples to show how to use them effectively.

Practice 1: Update top 2 rows. Update multiple rows distinctive by primary key for multiple columns in one query Back to Tutorial Index Page. For Data type , select Integer. For Current value , type 5. For Allowable values , click Range. Under Range of values, do the following: Click Minimum and type 5. Click Maximum and type Click Step size and type 5.

Click the Top tab. Select By Field. From the field drop-down list Category , select Sales. From the aggregation drop-down list, select Sum. When finished, click OK. Drag the Sales measure to the Columns shelf. Update statement returns deleted magic table with the previous version of the row and the inserted magic table with the new version of a row, which is going to be replaced or updated with the earlier values in the table. Even users can write data manipulation logic as well with these magic tables inside the trigger.

A magic table is stored in the temp DB. Therefore, whenever you use the magic tables in SQL Server with the query statement, tempdb will come in the picture. Whenever the magic table is utilizing with a query statement in the transaction, tempdb will be affected by that statement.

Below are the limitations of the magic table compare to the actual temp table table. Data manipulation with the magic table is much useful in the trigger for information auditing. Users can use join operations with the magic tables in SQL Server and compose a business logic as well. For example, a trigger to check if an update operation is performed on any particular column or not? If it happened, then execute the required statements to perform such tasks.