I agree with Guido, but I'll suggest you, don't write 'this' because you'd have to place it yourself, but if you change it for 'name of table' for example if your table is called 'tableone'. You will need the following command
this setpos [getpos tableone select 0 , getpos tableone select 1 , 1]
1, it's the correct heigh, for the table.