Hello, 

I created a table manually. then i created another table combined with the manual one with "Create a table linked to an existing data source".

How can i show that table to a specific log in users to show them only their rows ? 

i followed instructions from : https://wpdatatables.com/documentation/front-end-editing/allowing-users-to-edit-only-their-own-data/

But it works only for manual table. it is not working with the table type "Create a table linked to an existing data source".

i use sql query : 

SELECT user_id, user_email, tel FROM tab1
UNION ALL
SELECT user_id, user_email, tel FROM tab2
UNION ALL
SELECT user_id, user_email, tel FROM tab3;

it is not working with UNION ALL. (to show a specific row from user_id log in)

Hello Aleksandar, 

i tried this query and it works perfectly.

SELECT * FROM

(SELECT user_id, user_email, tel FROM tab1
UNION ALL
SELECT user_id, user_email, tel FROM tab2
UNION ALL
SELECT user_id, user_email, tel FROM tab3) t1;

Now users can see only their rows :)