To include integrity constraint in an existing relation use (i) create

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Module 2: Relational Query Languages & Design

20182m

To include integrity constraint in an existing relation use
(i) create table
(ii) modify table
(iii) alter table
(iv) drop table

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PreviousWhat is a foreign key? (i) A foreign key is a primary key of a relation which is an attribute in another relation (ii) A foreign key is a superkey of a relation which is an attribute in more than one other relations (iii) A foreign key is an attribute of a relation that is a primary key of another relation (iv) A foreign key is the primary key of a relation that does not occur anywhere else in the schema NextWhich of the following is not an integrity constraint? (i) Not null (ii) Positive (iii) Unique (iv) Check 'predicate'

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