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Introduction to SQL

Introduction to SQL
The SELECT statement SELECT 'Hi' FROM DUAL WHERE NULL = NULL; Outputs

FLASE
Hi
TRUE
Nothing

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Introduction to SQL
Which of the following are the five built-in functions provided by SQL?

SUM, AVG, MIN, MAX, MULT
SUM, AVG, MULT, DIV, MIN
COUNT, SUM, AVG, MAX, MIN
SUM, AVG, MIN, MAX, NAME

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Introduction to SQL
The SQL statementSELECT SUBSTR('123456789', INSTR('abcabcabc', 'b'), 4) FROM DUAL;

2345
456789
1234
6789

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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 > ALL (SELECT SALARY FROM EMPLOYEE);prints

9
0
10
5

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Introduction to SQL
The SQL keyword(s) ________ is used with wildcards.

NOT IN only
IN and NOT IN
IN only
LIKE only

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

Non-Equijoin
Equijoin
None of these
Self-Join

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