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Introduction to SQL

Introduction to SQL
Indexes may be created or dropped at any time.

False
True

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

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

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Introduction to SQL
What is the full form of SQL?

None of these
Structured Query List
Simple Query Language
Structured Query Language

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Introduction to SQL
Which of the following is illegal?

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

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Introduction to SQL
The benefits of a standard relational language include which of the following?

Reduced training costs
Increased dependence on a single vendor
Applications are not needed
All of these

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Introduction to SQL
To sort the results of a query use:

ORDER BY.
None of these
GROUP BY.
SORT BY.

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