Question

表中有A B C三列,用SQL语句实现：当A列大于B列时选择A列否则选择B列，当B列大于C列时选择B列否则选择C列。

Answer 1

select (case when a>b then a else b end),
(case when b>c then b esle c end)
from table_name

Answer 2

SELECT IF(a>b,a,b) ,IF(b>c,b,c) FROM ww