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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
COMMIT
DELETE

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Introduction to SQL
Count function in SQL returns the number of

groups.
distinct values.
columns.
values.

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Introduction to SQL
The SQL statement that queries or reads data from a table is ________ .

QUERY
None of these
SELECT
READ

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Introduction to SQL
Which is the subset of SQL commands used to manipulate Oracle Database structures, including tables?

None
Data Definition Language(DDL)
Both of above
Data Manipulation Language(DML)

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Introduction to SQL
'AS' clause is used in SQL for

Rename operation.
Projection operation.
Selection operation.
Join operation.

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

None of these
MODIFY TABLE
CHANGE TABLE
ALTER TABLE

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