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Introduction to SQL

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

prints garbage
is illegal
prints 045.926
prints 50

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Introduction to SQL
A subquery in an SQL SELECT statement is enclosed in:

parenthesis -- (...) .
brackets -- [...].
CAPITAL LETTERS.
braces -- {...}.

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Introduction to SQL
Which of the following is illegal?

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

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Introduction to SQL
Which of the following join is also called as an 'inner-join'?

None of these
Non-Equijoin
Equijoin
Self-Join

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Introduction to SQL
SQL provides five built-in functions: COUNT, SUM, AVG, MAX, MIN.

True
False

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

ADD
APPEND
UPDATE
INSERT

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