How to update Columns from one table using data from another with SQL?How to UPDATE certain records from a table using data from related records in another table of the same database?How to replicate data in SQL-92 between 2 existing tables in the same database.Following is the syntax to UPDATE the Balance field of the Customer table from the Balance field of another table my Customer.Customers AS C JOIN( SELECT O.customer_id, COUNT(1) cnt FROM dbo.
Before I show you the multi-table solution, let me demonstrate the simplest form of the --UPDATE C SET /* SELECT *, -- */ order_count = FROM dbo. In fact, I struggled with this problem for quite some time before I found out about this gem.In the following lines, I am going to show you three tricks that have made my life simpler on many occasions.The update query below shows that the PICTURE column is updated by looking up the same ID value in CATEGORY_ID column in table Categories_Test and Categories. If you need to update multiple columns simultaneously, use comma to separate each column after the SET keyword. Here we only want to update PICTURE column in Categories_Test table where the data in Category_Name column is Seafood in table Categories. Software and hardware names mentioned on this site are registered trademarks of their respective companies.Should any right be infringed, it is totally unintentional.