Sta je “Foreign Key”

U tabeli SNET_STUD_CLASS, za svakog studenta imamo listu razreda koje on pohadja:

STUDENTID CLASSID

---------- ----------

5 1

6 1

6 2

6 3

6 4

6 5

7 1

7 2

7 3

7 4

7 6

7 7

7 8

13 rows selected.

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