sql - where query certain quarrel be

i'm operative forums system. i'm perplexing grant users posts they've made. method couple work, i'd need burst page sole theme posted contained post, bookmarks work, etc. given new underline an aged forum, i'd formula forum component doesn't have keep lane each post, nonetheless simply stock list automatically.

i know stock list, nonetheless i need this:

given query, where x quarrel within query (guaranteed unparalleled multiple identifiers) appear? in, rows i have homogeneous it? sorted query.

ideally, i'd sql php, nonetheless can't finished sql i speculation that's an answer too. ^_^

thanks