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Introduction to SQL

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

Equijoin
None of these
Non-Equijoin
Self-Join

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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

5
0
9
10

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Introduction to SQL
SQL data definition commands make up a(n) ________ .

DDL
XML
DML
HTML

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Introduction to SQL
The SELECT command, with its various clauses, allows users to query the data contained in the tables and ask many different questions or ad hoc queries.

False
True

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

is illegal
prints garbage
prints 50
prints 045.926

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Introduction to SQL
In SQL, which command(s) is(are) used to change a table's storage characteristics?

CHANGE TABLE
All of these
ALTER TABLE
MODIFY TABLE

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