sql - How to select top N from a table

Question

I have to select the top 25 records from a table according to the column Num.

There are two issues. First, the table is not sorted by Num. I know this can be resolved by using GROUP ORDER BY. Second, the number of the records in the table might be less than 25.

Is there any way to perform this selection in just one SQL statement?

Answer 1

For SQL Server:

select top 25 * from table order by Num asc

For mySQL:

select * from table order by Num asc limit 25