Showing posts with label tablesrelationships. Show all posts
Showing posts with label tablesrelationships. Show all posts

Monday, March 19, 2012

cant do that request

Hi,
I'm going to explain as clearly as possible:

I have two tables:

Relationships(relation_id, table1, table2)
Relationfields(relation_id, field1, field2)

In Relationships, relation_id is the primary key
In Relationfields, relation_id is the foreign key

I have a front-end interface that allows the user to add records to
Relationships and Relationfields as followed:

The user selects a table1 and table2 values from listboxes. These are
real table names from sys.objects, so then the user can select fields
of these tables on which he wants to create a JOIN.
Anyway, I can easily insert the table1 and table2 into Relationships
(relation_id is an auto-increment). Then I need to get the relation_id
of this new Relationship (easy since I know which values I've inserted
and table1-table2 associations are unique.

Now the PROBLEM :
I need to insert into Relationfields all the fields selectioned by the
user for each of the two tables . But the user might have selected
several fields from table1 and table2, so I need to pass A LIST
PARAMETER to my Stored Procedure as I don't know how many values of
field1 and field2 there is going to be.

I hope this is clear enough. Is it possible to achieve what I want ?
Should I pass an entire concatenated string with values separated by
comma or whatever and then decrypt it in the stored procedure ?

ThxCould anyone help please ?|||If you're asking how to pass a list into a procedure as a parameter,
then see here:

http://www.sommarskog.se/arrays-in-sql.html

If that doesn't help, I suggest you post CREATE TABLE and INSERT
statements to clarify exactly what you need:

http://www.aspfaq.com/etiquette.asp?id=5006

Simon|||thanks. I think the first link should help me doing what I want.
Regards|||Why are you putting metadata in your schema, in total violation of the
basic principles of a relational database? Why don't you know the
differences between rows and records, fields and columns, data and
metadata?

You can kludge this with a lot of dynamic SQL that will run like cold
glue, have no data integrity and be unmaintainable. Someone will
probably help you do this. Please read a few books before you destroy
your employers data.|||The best way to pass multiple-row data into a stored procedure is using
OPENXML, any other method is a kludge.|||I put meta data in my shema because my employer pays me to do so... I'm
developping an administration tool for maintaining dynamic metadata of
a website.
Now I'm not sure in what way your comment is of any use to me...|||Ellen K > Thanks I'll look at this in the future. But I've found a
better way this time to avoid passing multiple-row data to my stored
procedure:)
Thx!