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Introduction to SQL

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

TRUNCATE
COMMIT
DELETE
ROLLBACK

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Introduction to SQL
A subquery in an SQL SELECT statement:

has a distinct form that cannot be duplicated by a join.
can only be used with two tables.
cannot have its results sorted using ORDER BY.
can always be duplicated by a join.

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

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

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Introduction to SQL
Which SQL keyword is used to retrieve a maximum value?

MAX
UPPER
MOST
TOP

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Introduction to SQL
Which of the following is illegal?

SELECT SYSDATE - (SYSDATE - 2) FROM DUAL;
SELECT SYSDATE - (SYSDATE + 2) FROM DUAL;
SELECT SYSDATE - SYSDATE FROM DUAL;
None of these

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