A request has been made for me to cover how to create a SQL If / Else statement. In this example, I am declaring a variable (@myVar), and using a select statement to set it equal to the value of table.columnName. Once you have a value, you can use that value in your If / Else statement. This example is checking to see if @myVar is greater than 10. If so, then the first SQL select statement is executed. If @myVar is not greater than 10, then the second SQL statement is executed.

DECLARE @myVar AS INTEGER

SELECT
@myVar = table.columnName
FROM table
WHERE columnName2 = condition

IF ( @myVar > 10 )
BEGIN
   SELECT *
   FROM table
   WHERE columnName = @myVar
END
ELSE
BEGIN
   SELECT *
   FROM table
   WHERE columnName < @myVar
END

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