Paging in SQL with LIMIT/OFFSET sometimes results in duplicates on different pages

Question

I\'m developing an online gallery with voting and have a separate table for pictures and votes (for every vote I\'m storing the ID of the picture and the ID of the voter). The t

Answer 1

in my case this problem was due to the Null value in the Order By clause, i solved this by adding another Unique ID field in Order By Clause along with other field.