21. | What is an attribute? |
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22. | What is a Relation Schema and a Relation? |
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23. | What is degree of a Relation? |
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24. | What is Relationship? |
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25. | What is Relationship set? |
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26. | What is Relationship type? |
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27. | What is degree of Relationship type? |
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28. | What is DDL (Data Definition Language)? |
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29. | What is VDL (View Definition Language)? |
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30. | What is SDL (Storage Definition Language)? |
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