Updating a view in sql guys perspective on dating

Posted by / 29-Feb-2020 11:35

Updating a view in sql

In the diagram below you’ll see where there is a match between these two tables: By matching esql Sales Person. Notice here we’re constructing a full name from the views First Name and Last Name columns. So, once we have the join, the last bit of business to it do the update. Suppose the Sales Last Year figures were found to be incorrect and needed to be adjusted by five percent.

Full Name to v Sales Person we can update esql Sales Person. Before we go much further, let’s first wipe out the city column values. You can easily adjust the values using the following statement: However, suppose the sales department want a record of all changes.

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No rows from the UPDATE statement are saved into the table, even those rows that didn’t generate an error.

Since this is an exclusive lock, not other transaction can modify data on this table, until the one which originally placed the lock is completed.

In this example, we’re going to show you how to update’s column values based on a match to another table.

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. The OUTPUT clause is used to log changes made to rows affect by an UPDATE statement.

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