Which one of the following is used to define the structure of the relation, deleting relations and relating schemas?
DML(Data Manipulation Langauge)
DDL(Data Definition Langauge)
Query
Relational Schema
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1
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What type of statement is this?
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2
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Which of the following is used to avoid cascading of authorizations from the user?
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3
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Which of the following is used to provide delete authorization to instructor?
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4
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What type of statement is this?
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5
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Which of the following is true regarding views?
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6
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Updates that violate __________ are disallowed.
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7
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An attribute A of datatype varchar(20) has the value “Avi”. The attribute B of datatype char(20) has value ”Reed”. Here attribute A has ____ spaces and attribute B has ____ spaces.
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8
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In the authorization graph, if DBA provides authorization to u1 which in turn gives to u2 which of the following is correct?
Solution |
9
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This command performs which of the following action?
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10
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To remove a relation from an SQL database, we use the ______ command.
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