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Introduction to SQL

Introduction to SQL
Which of the following command makes the updates performed by the transaction permanent in the database?

COMMIT
TRUNCATE
DELETE
ROLLBACK

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Introduction to SQL
Which of the following is a SQL aggregate function?

JOIN
AVG
LEFT
LEN

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Introduction to SQL
ORDER BY can be combined with the SELECT statements.

True
False

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Introduction to SQL
Which SQL statement is used to update data in a database?

UPDATE
MODIFY
SAVE
SAVE AS

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Introduction to SQL
SQL is a data sublanguage.

False
True

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Introduction to SQL
The SELECT statement SELECT 'Hi' FROM DUAL WHERE NULL = NULL; Outputs

Nothing
Hi
FLASE
TRUE

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