What is the syntax of case statement?

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.

What is the use of break syntax?

The break statement terminates the execution of the nearest enclosing do , for , switch , or while statement in which it appears. Control passes to the statement that follows the terminated statement.

Which one is correct syntax for update statement?

An SQL UPDATE statement changes the data of one or more records in a table. Either all the rows can be updated, or a subset may be chosen using a condition. The UPDATE statement has the following form: UPDATE table_name SET column_name = value [, column_name = value …]

What Is syntax database?

What is Syntax? The term syntax refers to strict structural patterns used when creating a query. As soon as you enter the search criteria using the correct syntax, the query should execute, and the requested records retrieved from the target database.

What does case mean in SQL?

SQL CASE. CASE is used to provide if-then-else type of logic to SQL. There are two formats: The first is a Simple CASE expression, where we compare an expression to static values. The second is a Searched CASE expression, where we compare an expression to one or more logical conditions.

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.

When to use case when in SQL?

CASE expression is widely used to facilitate determining / setting a new value from user input values. CASE expression can be used for various purposes which depends on the business logic. CASE expression is mostly used in SQL stored procedure or as a formula for a particular column, which optimizes the SQL statements.

How to use case in SQL?

Introduction to SQL CASE expression. The SQL CASE expression allows you to evaluate a list of conditions and returns one of the possible results.

Simple CASE expression. CASE expression WHEN when_expression_1 THEN result_1 WHEN when_expression_2 THEN result_2 WHEN when_expression_3 THEN result_3

Searched CASE expression.