A Database Error Occurred

Error Number: 1055

Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'dtech_vv_epaer.ebook.id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

SELECT * from ebook group by bookname order by updated_on DESC

Filename: models/Ebook_model.php

Line Number: 22