Q. Which of the following queries are legal?

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Q. Which of the following queries displays the sum of all employee salaries for those employees not making commission, for each job, including only those sums greater than 2500?

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Q. Which one of the following is used to define the structure of the relation ,deleting relations and relating schemas ?

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Q. Which one of the following provides the ability to query information from the database and to insert tuples into, delete tuples from, and modify tuples in the database ?

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Q. Create table employee (name varchar ,id integer)
What type of statement is this ?

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Q. Select * from employee
What type of statement is this?

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Q. The basic data type char(n) is a _____ length character string and varchar(n) is _____ length character.

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Q. 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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Q. To remove a relation from an SQL database, we use the ______ command.

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Q. Delete from r; r – relation
This command performs which of the following action ?

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Q. Insert into instructor values (10211, ’Smith’, ’Biology’, 66000);
What type of statement is this ?

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Q. Updates that violate __________ are disallowed.

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Q.
Name

Annie

Bob

Callie

Derek

Which of these query will display the the table given above ?

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Q. Select ________ dept_name
from instructor;

Here which of the following displays the unique values of the column ?

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Q. The ______ clause allows us to select only those rows in the result relation of the ____ clause that satisfy a specified predicate.

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Q. Select ID, name, dept name, salary * 1.1
where instructor;

The query given below will not give an error. Which one of the following has to be replaced to get the desired output?

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Q. The ________ clause is used to list the attributes desired in the result of a query.

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Q. Select name, course_id
from instructor, teaches

where instructor_ID= teaches_ID;

This Query can be replaced by which one of the following ?

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Q. Select * from employee where salary>10000 and dept_id=101;
Which of the following fields are displayed as output?

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Q. Which of the following statements contains an error?

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