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Introduction to SQL Questions

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Choose the correct option.

which of the following is valid SQL for an Index?


ACREATE INDEX ID;

BCHANGE INDEX ID;

CADD INDEX ID;

DREMOVE INDEX ID;

Answer: Option A

Explanation:

Here is no explanation for this answer

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Choose the correct option.

DISTINCT and its counterpart, ALL, can be used more than once in a SELECT statement.


ATrue

BFalse

Answer: Option B

Explanation:

Here is no explanation for this answer

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The SQL statement that queries or reads data from a table is ________ .


ASELECT

BREAD

CQUERY

DNone of the above is correct.

Answer: Option A

Explanation:

Here is no explanation for this answer

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Choose the correct option.

To remove duplicate rows from the results of an SQL SELECT statement, the ________ qualifier specified must be included.


AONLY

BUNIQUE

CDISTINCT

DSINGLE

Answer: Option C

Explanation:

Here is no explanation for this answer

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Choose the correct option.

SQL query and modification commands make up a(n) ________ .


ADDL

BDML

CHTML

DXML

Answer: Option B

Explanation:

Here is no explanation for this answer

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Choose the correct option.

N UPDATE CASCADE ensures which of the following?


ANormalization

BData Integrity

CMaterialized Views

DAll of the above.

Answer: Option B

Explanation:

Here is no explanation for this answer

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Choose the correct option.

The qualifier DISTINCT must be used in an SQL statement when we want to eliminate duplicate rows.


ATrue

BFalse

Answer: Option A

Explanation:

Here is no explanation for this answer

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Choose the correct option.

When three or more AND and OR conditions are combined, it is easier to use the SQL keyword(s):


ALIKE only.

BIN only.

CNOT IN only.

DBoth IN and NOT IN.

Answer: Option D

Explanation:

Here is no explanation for this answer

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Choose the correct option.

Find the SQL statement below that is equal to the following: SELECT NAME FROM CUSTOMER WHERE STATE = 'VA';


ASELECT NAME IN CUSTOMER WHERE STATE IN ('VA');

BSELECT NAME IN CUSTOMER WHERE STATE = 'VA';

CSELECT NAME IN CUSTOMER WHERE STATE = 'V';

DSELECT NAME FROM CUSTOMER WHERE STATE IN ('VA');

Answer: Option D

Explanation:

Here is no explanation for this answer

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Choose the correct option.

A subquery in an SQL SELECT statement is enclosed in:


Abraces -- {...}.

BCAPITAL LETTERS.

Cparenthesis -- (...) .

Dbrackets -- [...].

Answer: Option C

Explanation:

Here is no explanation for this answer

Workspace

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