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Introduction to SQL

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

ALTER TABLE
None of these
CHANGE TABLE
MODIFY TABLE

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Introduction to SQL
Most companies keep at least two versions of any database they are using.

False
True

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Introduction to SQL
The SQL statementSELECT ROUND(45.926, -1) FROM DUAL;

prints 045.926
prints 50
prints garbage
is illegal

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Introduction to SQL
What is the meaning of LIKE '%0%0%'

Feature has more than two 0's
Feature ends with two 0's
Feature begins with two 0's
Feature has two 0's in it, at any position

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Introduction to SQL
Table Employee has 10 records. It has a non-NULL SALARY column which is also UNIQUE.The SQL statementSELECT COUNT(*) FROM Employee WHERE SALARY > ANY (SELECT SALARY FROM EMPLOYEE);prints

0
10
9
5

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

DELETE
ROLLBACK
COMMIT
TRUNCATE

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