What's query or function will help me for this issus please ?

Question

Hi
I attached here jpg which will show you there 3 table A , b And c
And i needed know how i can make Function or any thing else for know which i add into cell question mark
Pls look into this attached and advise me
Take your time
http://imageshack.us/f/853/examplees.jpg/
Edited by: 964035 on Oct 9, 2012 1:09 AM
Edited by: 964035 on Oct 9, 2012 2:26 AM

Answer 1

Below the cods for create the table and insert some data as example
I needed know how i can Booking The item from stock for each order and how i can know the status of item it's will be available or not so we should do the order purchase for item
Create Table Color (                                   
     Order Number(5) Not Null ,                              
     Color Varchar2(8) Not Null ,                              
     Qty Number (8) Not Null )                              
Create Table Recipe (                                   
     Color Varchar2(8) Not Null ,                              
     Item Varchar2(8) Not Null ,                              
     Recipe Number (8) Not Null )                              
Create Table Stock (                                   
     Item Varchar2(8) Not Null Constraint Item_PK PRIMARY KEY,               
     Qty_Of_Stock Number (8) Not Null )               
Insert into Color VALUES ( 1500 ,     Red'     ,10);
Insert into Color VALUES ( 1500 ,     yellow'     ,15);
Insert into Color VALUES ( 1500 ,     Green'     ,8);
Insert into Color VALUES ( 1500 ,     Blue'     ,7);
Insert into Color VALUES ( 1600 ,     yellow'     ,6);
Insert into Color VALUES ( 1600 ,     Green'     ,7);
Insert into Color VALUES ( 1600 ,     Blue'     ,8);
Insert into Color VALUES ( 1700 ,     Red'     ,10);
Insert into Color VALUES ( 1700 ,     Blue'     ,15);
Insert into Color VALUES ( 1800 ,     Green'     ,16);
Insert into Color VALUES ( 1800 ,     yellow'     ,9);
Insert into Recipe VALUES ( 'Red','A',0.25);
Insert into Recipe VALUES ( 'Red','B',0.3);
Insert into Recipe VALUES ( 'Red','C',0.2);
Insert into Recipe VALUES ( 'Red','D',0.25);
Insert into Recipe VALUES ( 'Yellow','C',0.1);
Insert into Recipe VALUES ( 'Yellow','D',0.3);
Insert into Recipe VALUES ( 'Yellow','E',0.2);
Insert into Recipe VALUES ( 'Yellow','F',0.4);
Insert into Recipe VALUES ( 'Green','C',0.25);
Insert into Recipe VALUES ( 'Green','D',0.35);
Insert into Recipe VALUES ( 'Green','E',0.2);
Insert into Recipe VALUES ( 'Green','G','0.1);
Insert into Recipe VALUES ( 'Green','H',0.1);
Insert into Recipe VALUES ( 'Blue','A',0.35);
Insert into Recipe VALUES ( 'Blue','B',0.35);
Insert into Recipe VALUES ( 'Blue','C',0.3);
Insert into Stock VALUES ( 'A',50);               
Insert into Stock VALUES ( 'B',60);               
Insert into Stock VALUES ( 'C',40);               
Insert into Stock VALUES ( 'D',30);               
Insert into Stock VALUES ( 'E',20);               
Insert into Stock VALUES ( 'F',10);               
Insert into Stock VALUES ( 'H',25);               
Insert into Stock VALUES ( 'G',15);               
Take your time my dear ...