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Introduction to SQL

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.

True
False

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Introduction to SQL
The SQL statementSELECT SUBSTR('abcdefghij', INSTR('123321234', '2', 3, 2), 2) FROM DUAL;prints

ab
gh
bc
23

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Introduction to SQL
Which SQL statement is used to delete data FROM a database?

ALTER
DELETE
COLLAPSE
REMOVE

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Introduction to SQL
To remove duplicate rows from the results of an SQL SELECT statement, the ________ qualifier specified must be included.

DISTINCT
SINGLE
ONLY
UNIQUE

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

Non-Equijoin
Equijoin
Self-Join
None of these

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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
MODIFY TABLE
ALTER TABLE

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