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Introduction to SQL

Introduction to SQL
Which of the following is valid SQL for an Index?

ADD INDEX ID;
CHANGE INDEX ID;
REMOVE INDEX ID;
CREATE INDEX ID;

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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.

OUTER JOIN
NON-EQUIJOIN
EQUIJOIN
NATURAL JOIN

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Introduction to SQL
Which SQL keyword is used to sort the result-set?

ORDER BY
ORDER
SORT
SORT BY

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Introduction to SQL
Let the statementSELECT column1 FROM myTable;return 10 rows. The statementSELECT ALL column1 FROM myTable;will return

exactly 10 rows
more than 10 rows
less than 10 rows
None of these

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Introduction to SQL
Indexes can usually be created for both primary and secondary keys.

True
False

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Introduction to SQL
Which of the SQL statements is correct?

SELECT Username AND Password FROM Users
SELECT Username, Password FROM Users
SELECT Username, Password WHERE Username = 'user1'
None of these

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