Sql update subquery oracle

And of course, keep up to date with AskTOM via the official twitter account. Question and Answer. This is just one time process, gs, February 28, - pm UTC. BTW, the site looks excellent with the new changes. I like the new menu very much.

As documentation, a factored subquery is sometimes more easily understood than nested subqueries and may replace temp tables. But is there a way to perform the same update with only one sentence? Alexander, April 10, - pm UTC.

Tom, I may be experiencing the strangest Oracle behavior I have seen to date. Note that a subquery must appear within parentheses. A subquery can contain another subquery. The following statement returns the product name, list price, and the average list prices of products according to their categories:.

Oracle evaluates the subquery for each row selected by the outer query. This subquery is called a correlated subquery which we will cover in detail in the next tutorial.

The subqueries that use comparison operators e.. For example, the following query finds products whose list price is greater than the average list price. If the nested subquery returns more than one rows then it is an example of Multiple Row Subquery. The IN operator determines whether a value matches any values in a list or a subquery. The Oracle first executes the nested subquery to find salary of all employees in department There are total 6 employees in department and their salary can be seen below:.

The Outer query returns all the employees whose salary matches with salary of employees in department The query returns all employees whose salary is more than the salary of lowest earning employee in department