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Query

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Gita21

Gita21

Programmer
Nov 17, 2002
11
NZ
Course
------
CourseID(PK)
CourseStartDate(PK)

Registration
----------
customerID (PK)
courseID(PK)
courseStartDate(PK)

Relationship
Course 1--* Registration *--1 Customer

A person cannot register for a course where the courseStartDate
is same as the courseStartDate for a course already registered by that customer.

How to find out this?
 
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