Can we use if condition in SQL query?

Can we use if condition in SQL query?

We can use SQL IF statement without ELSE as well. In the following, the expression evaluates to TRUE; therefore, it prints the message. If the expression evaluates to FALSE, it does not return any output. We should use ELSE statement so that if an evaluation is not TRUE, we can set default output.

How do I create an if statement in SQL query?

You can have two choices for this to actually implement:

1. Using IIF, which got introduced from SQL Server 2012: SELECT IIF ( (Obsolete = ‘N’ OR InStock = ‘Y’), 1, 0) AS Saleable, * FROM Product.
2. Using Select Case : SELECT CASE WHEN Obsolete = ‘N’ or InStock = ‘Y’ THEN 1 ELSE 0 END as Saleable, * FROM Product.

How do I write an IIF condition in SQL?

Simple IIF example. DECLARE @a INT = 45, @b INT = 40; SELECT [Result] = IIF( @a > @b, ‘TRUE’, ‘FALSE’ );

Can we use if condition in where clause in SQL Server?

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

What statement will be used if I want to display you are not selected if the condition is false?

The else statement If we want our programs to execute a different set of instructions when the condition is false, then we can use an else statement.

How does if work in SQL?

The MySQL IF() function is used for validating a condition. The IF() function returns a value if the condition is TRUE and another value if the condition is FALSE. The MySQL IF() function can return values that can be either numeric or strings depending upon the context in which the function is used.

Can you use an IF statement in a where clause?

IF… ELSE clause is very handy and whenever you need to perform any conditional operation, you can achieve your results using it. But there are some limitations in IF… ELSE, and one of the limitations is that you cannot use it in WHERE clause.

Why are if else statements important?

The if-else statement is used to execute both the true part and the false part of a given condition. If the condition is true, the if block code is executed and if the condition is false, the else block code is executed.

How is if statement different from if else statement?

The if statement is a decision-making structure that consists of an expression followed by one or more statements. The if else is a decision-making structure in which the if statement can be followed by an optional else statement that executes when the expression is false.

What is escape function in SQL?

Escape sequences are used within an SQL statement to tell the driver that the escaped part of the SQL string should be handled differently. When the JDBC driver processes the escaped part of an SQL string, it translates that part of the string into SQL code that SQL Server understands.