Complex MySQL query

I need a complex query written in SQL involving multiple table joins. Please find the structure of the database attached. The result set of the query will be all of the rows and fields from adman_ad_spaces table that meet the criteria. I have three variables that can be filled or be an empty string. Empty string should match all fields for that variable. The first field is advertiser name, which corresponds to the field adman_users.name. If this field is empty, it should match all of the users. The second field is advertiser company, which corresponds to the field adman_advertisers.company. If this field is empty, it should match all of the advertisers. The third field is zone name, which corresponds to the field adman_zones.zone_name. If this field is empty, it should match all of the zones. The LIKE command should be used to provide partial matches. Please ask any questions you may have. The database structure is attached. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform MySQL, PHP