Type: Integer

The number of records in the table.

If a filter has been set on the record, this function will behave exactly the same as the COUNT Function (Record).

The count is approximate because it uses statistical information maintained by SQL Server, which is not kept precisely in synchronization with modifications to the table and is not under transaction control. However, it is much faster to use this information than to perform an accurate record count under transaction control, especially when there are a large number of records in the table.

Reference