My current tabular form just displaying some columns from table.
How/where can I add custom column in tabular form, which will be link or button and will take to another
To add custom column:
Go to "Region Definition" -> "Source", add new column to SQL query there. For example:
select col1, -- column of table
col2, -- column of table
'some text' custom_column -- custom column that will contain text "some text"
-- in every row
from my_table
Go to "Report Attributes", select column with name "Custom column" and click the "Edit" button (pencil picture), then go to "Column link" and fill fields:
See documentation for understanding APEX URL syntax: http://docs.oracle.com/cd/E37097_01/doc/doc.42/e35125/concept_url.htm