MySQL - Using If Then Else in MySQL UPDATE or SELECT Queries

Question

How do I update a table and set different values upon the condition evaluating to True.

For instance :

UPDATE Table
SET A = \'1\' IF A > 0 AND A &         


        

Answer 1

UPDATE table
SET A = IF(A > 0 AND A < 1, 1, IF(A > 1 AND A < 2, 2, A))
WHERE A IS NOT NULL;

you might want to use CEIL() if A is always a floating point value > 0 and <= 2