Database Management Systems Mcqs

Page No. 4

SELECT instructor.* FROM instructor, teaches WHERE instructor.ID= teaches.ID;
This query does which of the following operation?


aAll attributes of instructor and teaches are selected

✖


bAll attributes of instructor are selected on the given condition

✓


cAll attributes of teaches are selected on given condition

✖


dOnly the some attributes from instructed and teaches are selected

✖



SELECT * FROM instructor ORDER BY salary ____, name ___;
To display the salary from greater to smaller and name in ascending order which of the following options should be used?


aAscending, Descending

✖


bAsc, Desc

✖


cDesc, Asc

✓


dDescending, Ascending

✖


View Answer Desc, Asc

SELECT name FROM instructor WHERE dept name = ’Physics’ ORDER BY name;
By default, the order by clause lists items in ______ order.


aDescending

✖


bAny

✖


cSame

✖


dAscending

✓


View Answer Ascending

’_ _ _ ’ matches any string of ______ three characters. ’_ _ _ %’ matches any string of at ______ three characters.


aAtleast, Exactly

✖


bExactly, Atleast

✓


cAtleast, All

✖


dAll, Exactly

✖


View Answer Exactly, Atleast

SELECT emp_name FROM department WHERE dept_name LIKE ’ _____ Computer Science’;
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?


a%

✓


b_

✖


c||

✖


d$

✖


View Answer %

SELECT * FROM employee WHERE dept_name="Comp Sci";
In the SQL given above there is an error . Identify the error.


aDept_name

✖


bEmployee

✖


c“Comp Sci”

✓


dFrom

✖


View Answer “Comp Sci”

SELECT name ____ instructor name, course id FROM instructor, teaches WHERE instructor.ID= teaches.ID;
Which keyword must be used here to rename the field name?


aFrom

✖


bRename

✖


cAs

✓


dJoin

✖


View Answer As

The _____________ is essentially used to search for patterns in target string.


aLike Predicate

✓


bNull Predicate

✖


cIn Predicate

✖


dOut Predicate

✖


View Answer Like Predicate

_________ joins are SQL server default


aOuter

✖


bInner

✓


cEqui

✖


dNone of the mentioned

✖


View Answer Inner

_____ clause is an additional filter that is applied to the result.


aSelect

✖


bGroup-by

✖


cHaving

✓


dOrder by

✖


View Answer Having

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