search a record of table which is join with other table

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Hi
I have two table customer and service, customer is parent table and service is child(detail) table.. customer_id is foreign key i want to search how many record are not in service table which are in parent table
Please tell me soon!!!!
how?

Posted 23-Apr-13 9:06am

Asitsingh

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Kschuler · Accepted Answer · 2013-04-23T10:22:00

Without knowing what database your are using I can't give you exact syntax, but this is a basic SQL statement that would pull a list of services that do not have a customer:

SQL

SELECT * FROM tblService LEFT OUTER JOIN tblCustomer ON tblService.CustomerID = tblCustomer.CustomerID WHERE tblService.CustomerID IS NULL

If you want more help, you'll have to provide more information about your project and which part you are stuck. Click the Improve question link to add that. It's also helpful if you post the relevant code you are having trouble with.