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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?

TRUNCATE
ROLLBACK
DELETE
COMMIT

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

DML
XML
DDL
HTML

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

TRUE
Nothing
Hi
FLASE

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Introduction to SQL
Which of the following is the original purpose of SQL?

All of these
To specify the syntax and semantics of SQL data definition language
To define the data structures
To specify the syntax and semantics of SQL manipulation language

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Introduction to SQL
Which of the following SQL commands can be used to add data to a database table?

INSERT
UPDATE
ADD
APPEND

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Introduction to SQL
The HAVING clause acts like a WHERE clause, but it identifies groups that meet a criterion, rather than rows.

False
True

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