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Introduction to SQL

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

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

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Introduction to SQL
The format SELECT-FROM-WHERE is the fundamental framework of SQL SELECT statements.

False
True

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Introduction to SQL
Which of the following SQL query is correct for selecting the name of staffs from 'staffinfo' table where salary is 10,000 or 25,000?

Both A and B
SELECT name FROM staffinfo WHERE salary BETWEEN 10000 AND 25000;
None of these
SELECT name FROM staffinfo WHERE salary IN (10000, 25000);

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Introduction to SQL
Which of the following is a valid SQL type?

CHARACTER
FLOAT
All of these
NUMERIC

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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

0
9
10
5

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Introduction to SQL
............. joins two or more tables based on a specified column value not equaling a specified column value in another table.

NATURAL JOIN
NON-EQUIJOIN
OUTER JOIN
EQUIJOIN

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