SQL Online Quiz, SQL MCQ Quiz & Online Test

1 .

Which of the following are the five built-in functions provided by SQL?

COUNT, SUM, AVG, MAX, MIN

SUM, AVG, MIN, MAX, MULT

SUM, AVG, MULT, DIV, MIN

SUM, AVG, MIN, MAX, NAME

Correct Answer : Option (A)

COUNT, SUM, AVG, MAX, MIN

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2 .

The following SQL is which type of join:

SELECT CUSTOMER_T. CUSTOMER_ID, ORDER_T. CUSTOMER_ID, NAME, ORDER_ID FROM
CUSTOMER_T,ORDER_T WHERE CUSTOMER_T. CUSTOMER_ID = ORDER_T. CUSTOMER_ID

Equi-join

Natural join

Cartesian join

Outer join

Correct Answer : Option (A)

Equi-join

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3 .

How many tables may be included with a join?

One

Two

Three

All of the above

Correct Answer : Option (D)

All of the above

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4 .

Which of the following is valid SQL for an Index?

CREATE INDEX ID;

CHANGE INDEX ID;

ADD INDEX ID;

REMOVE INDEX ID;

Correct Answer : Option (A)

CREATE INDEX ID;

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5 .

Embedded SQL is which of the following?

Hard-coded SQL statements in a trigger.

Hard-coded SQL statements in a procedure.

Hard-coded SQL statements in a program language such as Java.

The process of making an application capable of generating specific SQL code on the fly.

Correct Answer : Option (C)

Hard-coded SQL statements in a program language such as Java.

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6 .

A UNION query is which of the following?

Combines the output from no more than two queries and does not include the same number of columns.

Combines the output from multiple queries and must include the same number of columns.

Combines the output from no more than two queries and must include the same number of columns.

Combines the output from multiple queries and does not include the same number of columns.

Correct Answer : Option (B)

Combines the output from multiple queries and must include the same number of columns.

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7 .

Which of the following is true concerning triggers?

They have an event, condition, and action.

You do not create them with SQL.

They execute against only some applications that access a database.

They cannot cascade (cause another trigger to fire).

Correct Answer : Option (A)

They have an event, condition, and action.

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8 .

In an SQL SELECT statement querying a single table, according to the SQL-92 standard the asterisk (*) means that:

all columns of the table are to be returned.

all records meeting the full criteria are to be returned.

all records with even partial criteria met are to be returned.

None of the above is correct.

Correct Answer : Option (A)

all columns of the table are to be returned.

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9 .

Which of the following do you need to consider when you make a table in SQL?

Data types

Default values

Primary keys

All of the above.

Correct Answer : Option (D)

All of the above.

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10 .

Which one of the following sorts rows in SQL?

SORT BY

ALIGN BY

ORDER BY

GROUP BY

Correct Answer : Option (C)

ORDER BY

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