题目如下：

Num

1
2
4
6
7
8
10
11
13

写条SQL语句转成下表：

Column1  Column2

1              2
4              4
6              8
10           11
13           13

答案：

selectMIN(Num),MAX(Num)from

(selectROW_NUMBER()over (orderbyNum)rk,NumFromNumbers)A

Groupby (A.rk-A.Num)

orderbyMin(Num)