Use the CASE expression.
Head over to this video to learn CASE expression in detail:
CASE WHEN Some_Column = 'CR' THEN 'credit'
WHEN Some_Column = 'NCR' THEN 'non-credit'
END
Refer to this video to understand how IFF function works:
Let’s understand how IFF function works:
We can consider IFF function as a combination of IF-ELSE and CASE statements. IFF function accepts 3 arguments which are as follows:
Boolean expression is the first argument. This returns either true or false.
If the result of the first expression holds ‘true’ then the 2nd argument will result as output otherwise 3rd argument.
Syntax:
IIF (Boolean_Expression, True_Value, Flase_Value)
Example:
SQL IFF query to compare two integers:
SELECT
IIF(15 > 10, 'TRUE', 'FALSE') AS Result;
In the above example, you can observe that Condition inside IIF function (i.e., 15>10) is TRUE. So, the second argument is returned as output, which is TRUE
