Updating a table from another table in sql server

You cannot undo the results of an update query, and making a backup helps make sure that you can reverse your changes if you change your mind.

When you need to update data from one table to another, consider the following rule: the data types for the source and destination fields must either match or be compatible.

By using an UPDATE statement, you can modify data in individual rows, sets of rows, or all rows in a table.

An UPDATE statement must always include a SET clause, which identifies the columns to be updated.

I also provide examples that demonstrate how the various clauses work.

I created the examples in the Adventure Works2008 database on a local instance of SQL Server 2008.

INSERT INTO Polling Places(PLACE, VCFull Addr, VCAddr, VCCity, VCZip, Phone, Alias Link) Select Vote Centers. This article describes how to create and run an update query in an Access desktop database.You use an update query when you have to update or change existing data in a set of records.All of these columns (PLACE, VCFull Addr, VCAddr, VCCity, VCZip, Phone, Alias Link) in all records in the Polling Places table need to be updated and I'd like to do it in the most efficient way possible. I realized I could simply do one field at a time, but that doesn't seem efficient to me.

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Based on my code, here is what I came up with for you.

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