SQL獲取行時與MIN（COL A）如果2行存在，那麼MIN（COLB）

Question

我有一個表，如下

Table1 
(
col A float, 
col B float 
) 

I need a row with min(col A). If 2 rows have same col A value then 
row with min(col B). 

EX: (case 1) 

    A  B 
    1.2 1.5 
    1.5 1.0 
Result should show be first row 

(case 2) 

    A  B 
    1.2 1.5 
    1.2 1.0 
Result should show be second row 

Is it possible in a single query? Please help

Answer 1

似乎是一個最簡單的方法：

select top 1 cola, colb 
from table1 
order by cola, colb 

Answer 2

select top 1 * from [dbo].[12] where a = (select min(a) from [dbo].[12]) OR b=(select min(b) from [dbo].[12])