Using Union All and Order By in MySQL

Question

I\'ve 2 tables:

create table advertised_products(id int,title varchar(99),timestamp timestamp);
insert advertised_products select 1,\'t1\',curdate();

create         


        

Answer 1

Error lies in here,

 "ORDER BY timestamp desc limit 3"

as you are combining the two tables query must know which fields are you using in which table.clearly that you are missing the table reference in your "orderby" clause

mention the table name/alias of the table name like below

 "ORDER BY your_table_name.timestamp desc limit 3"