How can I set the default tab as Data when clicking on table in Oracle SQL Developer. Currently, I am getting columns as the default tab in Oracle SQL Developer.
You can't.
But if the data tab is active in a table, and you go to open another table, it will take the first table's place, with the data tab still active.
If the table you open goes to a new document in the desktop (first table is pinned), the columns page will be active.
We do this because querying the data can take awhile.