Please could you provide us with more details and screenshots of what you're seeing?
Are you using custom SQL at all, if you are, do you have a top 1000 clause in the statement?
Also, with the tableau preview, by default it will only show a max 1000 rows (unless you change this manually):
However the dataset it pulls back could be more than this.
Thanks for feedback .
First, i have used the table "Sierra" on my data source, but I had some issues using some columns.
This table contains 10 000 000 rows.
Then i have made a New Custom SQL using the same table.
But i am not able to change the limit
However when I check on my sheet i have only 1000 rows