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SQL Else If

by suresh

The SQL Else If statement is useful to check multiple conditions at once. SQL Else If statement is an extension to the If then Else (which we discussed in the earlier post).

If Else statement only executes the statements when the given condition is either true or False. But in the real world, we may have to check more than two conditions. In these situations, we can use SQL Else If statement. Let us see the syntax of the SQL Server Else if statement:

SQL Else If Syntax

The syntax of the Else If in SQL Server is

IF (Expression 1)
BEGIN
   Statement 1;
END

ELSE IF (Expression 2)
BEGIN
   Statement 2;
END
..........
ELSE 
BEGIN
   Default Statement;
END

The SQL Server else if statement handles multiple statements effectively by executing them sequentially. It will check for the first condition. If the condition is TRUE, then it will execute the statements present in that block. If the condition is FALSE, then it will check the Next one (Else If condition) and so forth.

In Sql Server Else If examples, there will be some situations where condition 1, condition 2 is TRUE, for example:

x = 30, y = 15

Condition 1: x > y — TRUE

Condition 2: x != y — TRUE

In these situations, statements under the Condition 1 executed. Because ELSE IF conditions only execute if it’s previous IF or ELSE IF statement fails.

SQL Else If Flow chart

Let us see the flow chart of the SQL server else if statement for better understanding.

Flow Chart of a SQL Server Else If

SQL Else If Example

In this program, We are going to calculate whether he is eligible for a scholarship or not using SQL Else if statement

-- SQL Else If Example

--Declaring Total Marks Out of 1000
DECLARE @Total_Marks INT = 940 ;

IF @Total_Marks > = 900
BEGIN
   PRINT ' Congratulations ';
   PRINT ' You are eligible for Full Scholarship ';
END
ELSE IF @Total_Marks > = 800
BEGIN
   PRINT ' Congratulations ';
   PRINT ' You are eligible for 50 Percent Scholarship ';
END
ELSE IF @Total_Marks > = 750
BEGIN
   PRINT ' Congratulations ';
   PRINT ' You are eligible for 10 Percent Scholarship ';
END
ELSE
BEGIN
   PRINT ' You are Not eligible for Scholarship ';
   PRINT ' We are really Sorry for You ';
END

OUTPUT 1: In this SQL Server Else If demo, the Total_Marks = 940. It means First If condition is TRUE that’s why statements inside the If Statement displayed as Browser output

SQL ELSE IF 1

OUTPUT 2: Let us change the Total_Marks from 940 to 820 to show the SQL else if statement example. Here, first IF condition Fails so, It will check the else if (@Total_Marks >= 800), which is TRUE. So it will display the statements within this block. Although else if (@Total_Marks >= 750) condition is TRUE, but it won’t check that condition.

SQL ELSE IF 2

OUTPUT 3: Let us change the Total_Marks from 820 to 760, which means first IF condition and Else if (@Total_Marks >= 800) fails. So, It will check the else if (@Total_Marks >= 750), which is TRUE, so that it will print the statements inside this block.

SQL ELSE IF 3

OUTPUT 4: We are going to change the Total_Marks to 735. It means all the IF and Else If conditions Fail. So, It will print statements inside the else block.

SQL ELSE IF 4

I suggest you to refer the If then Else article in SQL Server

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