What is CASE used for in SQL?

What is CASE used for in SQL?

The SQL CASE Statement The CASE statement goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSE clause.

Can we use case in select statement?

CASE can be used in any statement or clause that allows a valid expression. For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as select_list, IN, WHERE, ORDER BY, and HAVING.

Can we use case when in update statement?

The CASE expression allows a statement to return one of several possible results, depending on which of several condition tests evaluates to TRUE. You must include at least one WHEN clause within the CASE expression; subsequent WHEN clauses and the ELSE clause are optional.

How can use case in stored procedure in SQL Server?

Case statement with simple expression

1. DECLARE @Name varchar(50)
2. SET @Name = ‘Rohatash’
3. SELECT.
4. Case @Name.
5. WHEN ‘Deepak’ THEN ‘Name Deepak’
6. WHEN ‘Manoj’ THEN ‘Name Found Manoj’
7. WHEN ‘Rohatash’ THEN ‘Name Found Rohatash’
8. ELSE ‘Name not Found’

Can I use case in where clause SQL Server?

CASE STATEMENT IN WHERE CLAUSE: We can use a case statement in Where, Order by and Group by clause. So, by using a CASE statement with the where condition displays the result.

How do you write a case statement in SQL Server?

SQL Server CASE statement syntax It starts with the CASE keyword followed by the WHEN keyword and then the CONDITION. The condition can be any valid SQL Server expression which returns a boolean value. For instance, the condition can be model > 2000, the THEN clause is used after the CONDITION.

Can we use case in where clause in SQL Server?

CASE STATEMENT IN WHERE CLAUSE: The CASE statement returns the value based on condition. We can use a case statement in Where, Order by and Group by clause. So, by using a CASE statement with the where condition displays the result.

Can we use case in update statement in SQL Server?

CASE statement works like IF-THEN-ELSE statement. I have SQL server Table in which there is column that I wanted to update according to a existing column value that is present in current row. In this scenario, we can use CASE expression. CASE expression is used for selecting or setting a new value from input values.

Can we put case in where clause?

What is a case statement?

The case statement is usually a public-facing document tied to a particular fundraising appeal.

A case statement can take many forms,from a glossy brochure to a brief statement of need to a presentation or letter.

A case statement should be written for your donors and supporters,not your internal audience.

How to write case statement in where clause?

We can use a case statement in Where, Order by and Group by clause. In the Customer table, I have displayed the First Name is Ram or the Last Name is Sharma’s salary. So, by using a CASE statement with the where condition displays the result.

What is a case statement in SQL?

The SQL Server case statement is a conditional statement that returns a single value based on the evaluation of a statement. Case statements can be used in a SELECT list, WHERE clause and even an ORDER BY clause.

How to use case when SQL?

The SQL CASE statement. The CASE statement is SQL’s way of handling if/then logic.

Adding multiple conditions to a CASE statement.

A quick review of CASE basics: CASE must include the following components: WHEN,THEN,and END.

Using CASE with aggregate functions.

Using CASE inside of aggregate functions.