Compare values of two columns then select the larger value

Question

I need to query a table and select 3 of the values of 4 columns. I need to compare the values of the 3rd column and the fourth column and select the larger value.

For ex

Answer 1

In T-SQL the IF command is for programatic control. For example:

• IF x THEN doSQLStatement1 ELSE doSQLStatement2

Within a SQL statement, you need CASE.

CASE WHEN a > b THEN a ELSE b END