Question

A     B
1     2
1     1
1     3
1     4
3     3
3     4
4     5

How can one use T-SQL to select only those rows that have column B value not greater than the next greater values in column A?

For example, if above table is the input, the output should be as follows;

A     B
1     2
1     1
3     3
4     5

Answer 1

select t1.A, t1.B
  from tbl t1
 where t1.B < isnull((select min(t2.A)
                        from tbl t2
                       where t2.A > t1.A), t1.B+1)