I want to delete old records of a table, because this table is very big and it will increase very fast from now on. This table has a column for date, and i want to have in my table just the 150 newest records. The point is that my query has to be optimized because my table is very big, or the query will take a long time to be executed. Like for example order it by date desc first. What iam looking for is something more faster.