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Ms sql updating multiple rows

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The traditional advice for improving performance for multiple UPDATE statements is to “prepare” the required query once, and then “execute” the prepared query once for each row requiring an update.But in many cases this only provides a modest improvement as each UPDATE operation still requires a round-trip communication with the database server.To properly show you how to use the UPDATE statement I will need to create a few tables to hold some sample data. Below is the code to create my Toy table: In order to show you how to UPDATE a table from data in another table I need to build a second sample data table that I will call New Toy Price.Below is the TSQL code to create and populate this table.There are multiple ways to use the UPDATE statement to update a SQL Server table.In this article I will show you the most common methods of using the UPDATE statement.

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The SQL Server (Transact-SQL) UPDATE statement is used to update existing records in a table in a SQL Server database.

There are 3 syntaxes for the UPDATE statement depending on whether you are performing a traditional update or updating one table with data from another table.

This depends somewhat on your RDBMS/host language, but at worst this can be accomplished with a simple dynamic SQL (using a clause), and then a standard update-from-another-table.

Most systems provide utilities for bulk load, though Second - And this is somewhat RDBMS dependent as well, you could construct a dynamic update statement.