| By: Will Robertson Date: 2003-06-28 Time: 00:38 | Nested QueriesAck... okay this question was asked in french... diddn't really understand the answer. Here's a more clear problem layout.
 For theorhetical sake, let's say I'm building a database for a school. Now the school has classes in our first table
 
 Classes:
 -Class ID
 -Class Title
 -Class Description
 
 Then we put our students in another table:
 Students:
 -Student ID
 -Student Name
 (for our example we don't need anymore entries on this table)
 
 Now, our picklist table... (which tells us which student is enrolled where)
 -Picklist ID
 -Student ID (referenced to Student table)
 -Class ID (referenced to Class table)
 
 Now I want to display them as follows:
 Student1
 In Classes: Class1, Class2, Class3
 Student2
 In Classes: Class2, Class3
 Student3
 In Classes Class1, Class3
 etc.
 
 normally with php... first I'd run down and select what I needed from the students tables to get a student listing.
 
 SELECT Student Name, Student ID FROM Student;
 
 Then for each student, I would SELECT out his classes:
 
 SELECT Class.Class Name FROM Class as Class AND Picklist as Picklist WHERE (Picklist.Student ID == $Student ID) AND (Class.Class ID == Picklist.Class ID)
 
 How would I then create a TBS doc to display it?
 
 (Yes I know the SQL entries here will not work, these were pulled out of my brain. I can think of at least 3 differn't situations where I will need to do similar things).
 
 
 
 
 
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      | By: Skrol29 Date: 2003-06-28 Time: 01:35 | Re: Nested QueriesHello Will, 
The answer is Clone Blocks. 
That's exacly what they are made for.  
Cone blocks are described in the manual at th chapter 
HTML Side/Merge Blocks.
 
Here is how to do with your example: 
HTML:
 | [stud;block=begin] [stud.Name]
 In Classes: [class;block=begin;p1=[stud.Student_ID]] [class.Class_Title], [class;block=end]
 [stud;block=begin]
 
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PHP:
 | $TBS->MergeBlock('stud',$cnx_id,'SELECT Student_ID,Student_Name FROM Students') ; 
 $TBS->MergeBlock('class',$cnx_id,'SELECT Class_Title FROM Classes INNER JOIN PickList ON (Classes.Class_ID=PickList.Class_ID) WHERE (Student_Id=%1%)') ;
 
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