Can you use a subquery in a case statement?

Case Statement and Subquery Example This example use the Subquery inside a Case Statement in SQL Server. First, the Subquery will execute and finds the Average of the Sales amount. Same as IF ELSE statement.

How do you write multiple conditions in a case statement in SQL?

Here are 3 different ways to apply a case statement using SQL:

(1) For a single condition: CASE WHEN condition_1 THEN result_1 ELSE result_2 END AS new_field_name.
(2) For multiple conditions using AND: CASE WHEN condition_1 AND condition_2 THEN result_1 ELSE result_2 END AS new_field_name.

Can you do multiple subqueries in SQL?

Multiple Row Sub Query Multiple-row subqueries are nested queries that can return more than one row of results to the parent query. Multiple-row subqueries are used most commonly in WHERE and HAVING clauses. Since it returns multiple rows,it must be handled by set comparison operators (IN, ALL, ANY).

How do you use multiple values in a case statement?

SQL:2003 standard allows to define multiple values for simple case expression: SELECT CASE c. Number WHEN ‘1121231’,’31242323′ THEN 1 WHEN ‘234523’,’2342423′ THEN 2 END AS Test FROM tblClient c; It is optional feature: Comma-separated predicates in simple CASE expression“ (F263).

Can Case statement return multiple values in Oracle?

4 Answers. A CASE statement cannot return more than one value, it is a function working on one value.

How many Subqueries can be nested in a statement?

A subquery can be nested inside the WHERE or HAVING clause of an outer SELECT , INSERT , UPDATE , or DELETE statement, or inside another subquery. Up to 32 levels of nesting is possible, although the limit varies based on available memory and the complexity of other expressions in the query.

What are multi row functions in SQL?

The multi-row function in SQL is used to retrieve data per set of rows at the time when we work on the group by clause we use the Multi-Row Function.