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Tables within a Table - SQL
Figure here is an exact copy of the one in the theory book and as before it is just an alternative way of representing some of the information conveyed by the tables in Figure (but not a recommended database design for that information).
Figure: Tables within a table
For each course, it shows the exam mark obtained by each student who took the exam for that course.
Substitution and Instantiation - SQL It shows how NULL might appear in substitution for a parameter of a predicate and how it might thus participate in instantiation of that p
Parameter Default Values As the illustration below shows, you can initialize the IN parameters to the default values. In that way, you can pass various numbers of actual par
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