mysql select lowest price from multi select

Question

TABLE price

user_id    b01    b02    b03    b04    b05    b06    b07    b08    b09
MP01       21     32     12     34     56     26     21     21     26    
MO11         


        

Answer 1

This is an alternative approach to LEAST. Not easy as Using Least function. But might come in handy in some situations

SELECT MIN(b01) FROM(
select user_id , b01 from price
union all
select user_id , b02 from price
union all
select user_id , b03 from price
union all
select user_id , b04 from price
union all
select user_id , b05 from price
union all
select user_id , b06 from price
union all
select user_id , b07 from price
union all
select user_id , b08 from price
union all
select user_id , b09 from price
) temp 
WHERE user_id = 'MP01'