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Help with SQL statement
Message
From
09/01/1999 07:43:10
 
 
General information
Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Miscellaneous
Thread ID:
00174254
Message ID:
00174331
Views:
24
>I have a table with 3 fields with data as follows:
>
><B>CLASS            CODE         DESCRIPTION</B>
>Orientation         H         Horizontal
>Orientation         V         Vertical
>Orientation         I         Island
>Orientation         S         Square
>Geography           F         Full run
>Geography           A         A/B split
>Geography           R         Regional
>Size                A         Full Page
>Size                B         1/2 Page
>Size                C         1/4 Page
>Size                D         1/8 Page
>Color               4         4 Colors
>Color               2         2 Colors
>Color               0         Black and White
>Now, I need to build a table with CODE and DESCRIPTION field for each combination of 4 different classes. If my math is correct, I should have 144 records (4 Orientations X 3 Geography X 4 Sizes X 3 Colors). Both the CODE and DESCRIPTION field should contain "combined" data. An example of which would be: HFA4 (Horizontal, Full run, Full Page, 4 Colors). I'm looking for an "easy" SQL command to do this.

Easiest would be to do 5 selects - the first four select out the Code and Description for each type of thing, and then a Cartesian join to create the combined code tables:
SELECT Code,Description ;
  FROM MyTable ;
 WHERE Class = 'Orientation' ;
  INTO CURSOR Orient
SELECT Code,Description ;
  FROM MyTable ;
 WHERE Class = 'Geography' ;
  INTO CURSOR Geog
SELECT Code,Description ;
  FROM MyTable ;
 WHERE Class = 'Size' ;
  INTO CURSOR Size
SELECT Code,Description ;
  FROM MyTable ;
 WHERE Class = 'Color' ;
  INTO CURSOR Color

SELECT Orient.Code + Geog.Code + Size.Code +Color.Code AS Codes, ;
       ALLTRIM(Orient.Description - ',' - ;
               Geog.Description - ',' - ;
               Size.Description - ',' - ;
               Color.Description) ;
  FROM Orient, Geog, Size, Color ;
  INTO Cursor AllCodes ;
 ORDER BY Codes
EMail: EdR@edrauh.com
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