How do I write if logic in SQL?

How do I write if logic in SQL?


  1. IF (Expression )
  2. — If the condition is TRUE then execute the following statement.
  3. True Statements;
  4. — If the condition is False then execute the following statement.
  5. False Statements.

Can we add if condition in where clause?

Answer, no. IF is a control flow statement used to control the logical flow of a script, stored procedure, or user-defined function.

What is conditional operator in SQL?

Ternary Operator in SQL also be termed as Conditional Operator can be defined as a unique decision-making operator found in many programming languages. Case Expression can be expanded as a generalization of Ternary Operator.

What are conditional expressions in SQL?

Conditional Expressions in SQL are used to evaluate conditions based on the input values. Conditional Expressions that are used in SQL are CASE, DECODE, COALESCE, NULLIF, IFNULL, IN. Conditional Expressions works on the conditions.

What is conditional logic SQL?

Conditional statements are used to define what logic is to be executed based on the status of some condition being satisfied. There are two types of conditional statements supported in SQL procedures: CASE.

Which is faster case or IIF?

IIF is internally converted to CASE expression so CASE expression is slightly faster than IIF but the difference may be of few nano seconds.

How do you validate a query?

Validating and Saving a Query

  1. After you create the object query and specify the conditions, you validate it.
  2. Click Validate to run the query validation. The Validate Query window displays the validation results.
  3. After you validate the query, you can save it for later use.

What is the default parameter for stored procedure in SQL Server?

SQL Server Stored Procedure using NULL as Default Parameter. In most cases it is always a good practice to pass in all parameter values, but sometimes it is not possible. So in this example we use the NULL option to allow you to not pass in a parameter value.

What is stored procedure if else in SQL Server?

SQL Server stored procedure if else. The IF-ELSE statement in SQL Server is a conditional statement that allows to either execute or skip a SQL statement block depending upon the specified condition. To execute an IF-ELSE block in SQL Server, we can use the following syntax.

How do you use conditional logic in a stored procedure?

If any other value is entered in the stored procedure then a message is given out to use the correct value. This is a simple example of how to use conditional logic in a stored procedure and do a little bit of error handling and providing users with correct message.

What are output parameters in stored procedures?

Output parameters allow the stored procedure to pass a data value or a cursor variable back to the caller. User-defined functions cannot specify output parameters. Every stored procedure returns an integer return code to the caller.