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Introduction to SQL

Introduction to SQL
Which SQL statement is used to delete data FROM a database?

ALTER
DELETE
COLLAPSE
REMOVE

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Introduction to SQL
Count function in SQL returns the number of

values.
columns.
groups.
distinct values.

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Introduction to SQL
The SQL -92 wildcards are ____ and ____ .

underscore(_); question mark (?)
percent sign (%); underscore (_)
question mark (?); asterisk (*)
asterisk (*); percent sign (%)

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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
EQUIJOIN
NATURAL JOIN
NON-EQUIJOIN

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Introduction to SQL
SQL data definition commands make up a(n) ________ .

HTML
DML
XML
DDL

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

ROLLBACK
TRUNCATE
DELETE
COMMIT

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