Hi Martin, You are talking about standard Parent/Child relationships here but because you have unlimited number of entries you fold it into one table and have a Parent_ID column. So if you have your required details as being these columns
Name SomethingElse Then a standard table might be Name_ID Name Somethingelse adding the parent id column would be Name_ID Name Somethingelse Parent_ID or Create Table TableName ( Name_ID INTERPER PRIMARYKEY , Name , Somethingelse , Parent_ID ) Now all you need to do is fill in the details , PARENT_ID = 0 means it has no parents (or leave it NULL if you want) When you retrieve the rows you always do select * from Tablename where Parent_ID = 2 (or what ever) regards Greg O ----- Original Message ----- From: John Scott To: [EMAIL PROTECTED] Sent: Monday, January 19, 2004 9:52 AM Subject: [sqlite] Best method to create a database with a tree structure? Hello folks, I am thinking of to create a database with a tree structure. BUt it seems to be a hard work. I would like to have a tree structure embbeded into the database like: Root folder which contains two other folders "books" and "music". If a click on books, only the entries in the database which belong to the folder bools under root should be displayed. Does someone have a good idea?? Thanks, Martin --------------------------------- 每天都 Yahoo!奇摩 海的顏色、風的氣息、愛你的溫度，盡在信紙底圖 信紙底圖
