Updating sql database
Knowing that esql Sales Person was originally populated by information from Sales we use knowledge to set up a query that pumps data from v Sales Person into esql Sales Person.This is possible since the sales person’s full name is common to both tables.You can get started using these free tools using my Guide Though this article uses the Adventure Works database for its examples, I’ve decided to create an example table for use within the database to help better illustrate the examples. Also, let’s initially populate the table with some data using the following INSERT statement: You can learn more about the INSERT statement by reading our article Introduction to the INSERT Statement.
In this example, we’re going to show you how to update’s column values based on a match to another table.
An exclusive (X) lock is always placed on a table when an update is run.
The lock is held in place until the update statement completes.
Recall the INNER JOIN clause is used to match the rows from one table to another using a join condition. The complete script to run to log the output into a temporary table is: This statement defines a table with three columns and names the table variable @Update Log.
The reason we’re using a table variable is temporary and will be removed once query session is closed.