Updating multiple tables in sql
After each exercise, we provide the solution so you can check your answer.
The SQL Transport Schema Generation Wizard does not permit the selection of multiple tables for updating when generating a schema for an updategram.
It is possible, however, to manually create an updategram that will update multiple tables.
I have a function that updates three tables, but I use three queries to perform this.
I wish to use a more convenient approach for good practice. Book ID is very important, without it The Books table update would happen to all rows and not only for the row with the specified id. There's also a couple restrictions for ordering and limiting on multiple table updates you can read about here: ctrl+f "join").
How can I update multiple tables in My SQL with a single query? The WHERE clause is evaluated separately for each table. Some lessons are learned the hard way, this one was learned in the terrifing way. There is no significant difference between sending three queries individually or as a multiple query, except perhaps if your query function opens a new connection every time.
Column2 = 'two'FROM Table1 T1, Table2 T2WHERE T1= T2.idand T1= 'id1'Does Sql Server 2008 provide any mechanism to do so?Microsoft is conducting an online survey to understand your opinion of the Msdn Web site.If you choose to participate, the online survey will be presented to you when you leave the Msdn Web site. UPDATE summary_data SET current_category = (SELECT category_id FROM products WHERE products.product_id = summary_data.product_id) WHERE EXISTS (SELECT category_id FROM products WHERE products.product_id = summary_data.product_id); If you want to test your skills using the SQL UPDATE statement, try some of our practice exercises.These exercises allow you to try out your skills with the UPDATE statement.