well neither a,b or c :P i have lets say 1000 different fruits and 1000 different animals with many to man relations now i want to extract 100 differnt fruits held by 100 different animals without dupes of fruit or animal
<[EMAIL PROTECTED]> schrieb im Newsbeitrag news:[EMAIL PROTECTED] > Sebastian, > > I don't think we completely understand your question....or someone would > have responded long before now. Let me see if I can rephrase the > situation and maybe we can get a response. > > You have two tables that contain objects (your example: fruits and > animals) and a table that relates them (example: fruits_animals) in a > many-to-many relationship. > > Is your situation: > A) You want to return 100 un-duplicated random combinations of the > objects, regardless of if they have an entry in the relationship table? > - OR - > B) You want a list of 100 un-duplicated random rows from the relationship > table? > - OR - > C) Each time you run your query containing "ORDER BY RAND()" , you get the > exact same set of records back? > > Yours, > Shawn Green > Database Administrator > Unimin Corporation - Spruce Pine > > > "Gerske, Sebastian" <[EMAIL PROTECTED]> wrote on 07/20/2004 06:18:11 AM: > > > help me please :/ > > > > > > ""Gerske, Sebastian"" <[EMAIL PROTECTED]> schrieb im Newsbeitrag > > news:[EMAIL PROTECTED] > > > Hello list, > > > > > > i still need a solution for my 3 table join rand problem, im using > version > > > 4.1 now so subqueries are possible: > > > > > > explanation: > > > > > > i have 3 tables lets say: > > > > > > fruits: > > > > > > id, name > > > 1 banana > > > 2 apple > > > 3 strawberry > > > > > > fruits_animals > > > > > > id, id_fruits, id_animals > > > 1 1 2 > > > 2 1 3 > > > 3 3 1 > > > 4 2 4 > > > > > > animals > > > > > > id, name > > > 1 cat > > > 2 dog > > > 3 mouse > > > 4 elephant > > > > > > > > > My problem is that if i join the tables and order them by rand i > always > > get > > > one result something like: > > > strawberry, cat (fruit id = 3, animal id = 1 ) > > > or > > > banana, dog (fruit id = 1, animal id = 2) > > > but never > > > banana, mouse( fruit id = 1, animal id = 3 ) > > > > > > and need to select 100 different relations without redundancies hows > that > > > possible ? > > > > > > regards sebastian gerske > > > > > > > > > > > > > > -- > > MySQL General Mailing List > > For list archives: http://lists.mysql.com/mysql > > To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] > > > -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
