The most commonly used operation in relational algebra for projecting a set of tuple from a relation is
Join
Projection
Select
Union
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1
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A domain is atomic if elements of the domain are considered to be ____________ units.
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2
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The ________ clause is used to list the attributes desired in the result of a query.
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3
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Course(course_id,sec_id,semester) Here the course_id,sec_id and semester are __________ and course is a _________
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4
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Which one of the following has to be added into the blank to select the dept_name which has Computer Science as its ending string?
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5
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In SQL the spaces at the end of the string are removed by _______ function.
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6
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The tuples of the relations can be of ________ order.
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7
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Which keyword must be used here to rename the field name?
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8
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For each attribute of a relation, there is a set of permitted values, called the ________ of that attribute.
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9
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Student(ID, name, dept name, tot_cred)
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10
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In the SQL given above there is an error . Identify the error.
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