What is adding extra columns?
You can retrieve many fields from the inner table by using add extra column button; to retrieve extra fields from the inner table, go to step#4 (Configure Fields)
Choose the table you want to return the element from it
Here is an example of retrieving the full_name and phone number fields from the inner table emp_information and viewing it on the emp_list page
first, add inner table foreign key from add new field
fill the field information by choosing int field type and writing the inner table name, and adding _id
save
you can retrieve one field only from the inner table column and many fields from add extra column button. first, I will retrieve the employee's full name from the inner table column, and then I will retrieve the basic salary from the add extra column button
and now, for retrieving many fields from the inner table, click add extra column button
choose the table and then choose the field that you want to be shown
Click save
you can retrieve more than one field one by one.
once you use the extra column button, must show at the end of stap#4 the same as this table