Assining one project to only one customer

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i am using tables customer(Customerid) and project(Projectid)

my req is one project should have only one customer...

i.e, if project1 is assigned to customer1 then it should not be assigned again...but project1 can be assigned to customer2,3,4....

project contains(projectid,projectcode,projectdesc,projname)...projid is primary key
customer contains(custid,custname,custtype)...custid is primarykey...

Posted 24-Jul-12 20:03pm

Member 9068558

Updated 24-Jul-12 20:11pm

v2

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bbirajdar 25-Jul-12 2:05am

ok..

graciax8 25-Jul-12 2:06am

show us the table's columns.

Sergey Alexandrovich Kryukov 25-Jul-12 2:07am

Not clear. First of all, what do you call a "project"?
--SA

Member 9068558 25-Jul-12 2:09am

project contains(projectid,projectcode,projectdesc,projname)...projid is primary key
customer contains(custid,custname,custtype)...custid is primarykey...

Aarti Meswania 25-Jul-12 2:19am

i.e, if project1 is assigned to customer1 then it should not be assigned again...but project1 can be assigned to customer2,3,4....

what is the meaning of line?
It's confusing!

graciax8 25-Jul-12 2:32am

you want to select the customers that can still be assigned to a specific project? is that it?

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OriginalGriff · Answer 1 · 2012-07-24T20:19:00

Solution 1

Personally? I would have a customer field in the project table. If it is null, it isn't assigned, if it is not null it is assigned to that customer. Since you can't put two values in the same field of the same row, you can't assign the project to more than one customer...

Posted 24-Jul-12 20:19pm

OriginalGriff

Comments

Member 9068558 25-Jul-12 2:21am

not understood clearly

OriginalGriff 25-Jul-12 2:24am

Add a column to your Project table: custid
When you assign a project to the customer, set the custid field of the project table to the id of the customer from the customer table.

Member 9068558 25-Jul-12 2:23am

i dnt have customer field in project table

OriginalGriff 25-Jul-12 2:24am

Add one!

sandeep nagabhairava 25-Jul-12 7:46am

yes,your right... my 5!