>but I must to operate with the table ( append, delete an modify the table )
>the filter way how much affects the speed of acces ?
The filter affects the speed adversely if you: a) have more than about 20,000 records, b) show data on a grid.
In this case, it is convenient to use a parameterized view for quick access.
Why do you want exclusive access to the table?
Hilmar.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)