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Introduction to SQL

Introduction to SQL
You can add a row using SQL in a database with which of the following?

CREATE
INSERT
MAKE
ADD

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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
5
10
9

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

None of these
Self-Join
Non-Equijoin
Equijoin

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Introduction to SQL
A subquery in an SQL SELECT statement:

cannot have its results sorted using ORDER BY.
has a distinct form that cannot be duplicated by a join.
can always be duplicated by a join.
can only be used with two tables.

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

TRUE
Nothing
FLASE
Hi

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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
5
10
0

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