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Introduction to SQL

Introduction to SQL
The SELECT command, with its various clauses, allows users to query the data contained in the tables and ask many different questions or ad hoc queries.

True
False

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Introduction to SQL
Which command undo all the updates performed by the SQL in the transaction?

DELETE
TRUNCATE
ROLLBACK
COMMIT

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

False
True

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

SUM, AVG, MULT, DIV, MIN
SUM, AVG, MIN, MAX, NAME
COUNT, SUM, AVG, MAX, MIN
SUM, AVG, MIN, MAX, MULT

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Introduction to SQL
............. joins two or more tables based on a specified column value not equaling a specified column value in another table.

EQUIJOIN
OUTER JOIN
NATURAL JOIN
NON-EQUIJOIN

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Introduction to SQL
In SQL, which command(s) is(are) used to change a table's storage characteristics?

All of these
MODIFY TABLE
CHANGE TABLE
ALTER TABLE

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