Sorting in Master-Detail detail table...

How can I (is there a way to...) sort on a field in the detail table of a master-detail combination that is NOT the field used to define the master-detail relationship?!?!

Specifically, I'm using a Guests table (each record identified by a unique Guest ID), and an Orders table (each record containing the Guest ID of the Guest who ordered something as well as the Item # of the item ordered).  I want to display the items ordered by a specific guest, but want to SORT them based on the Item # field (of the Orders table).

Oh... D4 with Access tables, all fields mentioned above have indices.

Who is Participating?
kretzschmarConnect With a Mentor Commented:
well jim,

thanks for the points :-)
good luck again
will take a look

meikl ;-)

hi raven

what about to select the index of
the field on which you will sort.
use the propertys indexfieldname or
indexname on your detailtable for this

Raven1155Author Commented:

Nope.  Changing the indexfieldname or the indexname ruins the master-detail relationship.

NEXT!!  ;^P
Get your problem seen by more experts

Be seen. Boost your question’s priority for more expert views and faster solutions

yup raven,

you're right, well then you must do it with a query by usage of an order by clause. if the resultset must be editable, then it could be, that you must use a TUpdateSQL-Component as UpdateObject-Property for this sorted query.

if you leave your email-address here,
then i can send you a sample(paradox-based)
(because it is not much code (<10 lines)
but some adjustments on the propertys)

Raven1155Author Commented:

First, thanks for following up.

Second, you've already sent me and example of UpdateSQL code (Thanks).

Third, I tried creating a Master-Detail relationship using Queries (from scratch, I didn't want to lose code I'd already written), and I can get the Master-Detail relationship using the WHERE clause, or I can sort the results using ORDER BY, but I can't get the BDE to accept BOTH clauses in the same SQL statement!

I am sure that this do-able, truly, and would love to hear from other Experts too!!!
hi jim,

yup, i remember me,
(after visiting your history) ;-)

must be access, tell me do you use odbc or
native drivers to access access.

if it not solved until tomorrow,
will i try , the same with access

good night

meikl ;-)
Raven1155Author Commented:

"native" drivers, 'cuz odbc screws up the field sizes when looking at the Access tables (and the native driver seems to work pretty well otherwise)!

Raven1155Author Commented:
Okay, I've figured out the SQL code that I >could< use to solve this using TQueries (well, TUpdateSQL's), but I >>REALLY<< would appreciate hearing if there is ANY way to sort by (in this case) Item # in a Master-Detail relationship that doesn't USE Item #!?!?!?

{Because I don't really want to use UpdateSQL's because I'm caching my transactions and don't know how this would work UpdateSQL's would work in that case!}
hi raven,

have another solution ;-)
tested with access97 and native-driver.

you must create combined indexes on your detailtable like

masterid must be the first field of the combined-index, because over this field is done the m-d relationship

a sample

procedure TForm1.DBGrid2TitleClick(Column: TColumn);
  If Column.FieldName = 'a' then
    Table2.IndexName := 'a_id' else //index is combined mid,a
  If Column.FieldName = 'b' then
    Table2.IndexName := 'b_id' else //index is combined mid,b
  If Column.FieldName = 'c' then
    Table2.IndexName := 'c_id'; //index is combined mid,c

try it out

Raven1155Author Commented:

Please send something as an answer so I can award points.

I found out the basic problem... I'm an idiot! ;^}

I'd tried the dual-field index like you've just suggested, and the item numbers looked messed up.  Turns out that this was my fault (surprise) because of how I was storing Item # (as a string... necessary due to possible values).  I fixed how I stored the Item #, using GetText and SetText, and now it works!

Thanks a LOT for your help!

Jim Sky 8^o

PS- Please see the question list for my NEXT problem!
All Courses

From novice to tech pro — start learning today.