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There are three components to an UPDATE statement: Note: The Sales Person ID generated for your table’s rows may be different than what is show in the exercises, since this primary key is auto generated.The UPDATE statement is capable of updating more than one row. All rows returned via the WHERE clause criteria are updated.In this article we’ll explore how to use the UPDATE statement.We discuss some best practices, limitations, and wrap-up with several examples.Some of the common ones are: In these cases, the UPDATE statement execution stops and the UPDATE generates an error.
There are several common reason an UPDATE statement may fail.
A primary key is a field in a table which uniquely identifies each row/record in a database table. When multiple fields are used as a primary key, they are called a composite key.
A table can have only one primary key, which may consist of single or multiple fields.
Below is an example of a simple select statement with an INNER JOIN clause.
Suppose you were asked to provide a list of all Adventure Works2012 product categories and subcategories.