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Introduction to SQL

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

prints garbage
prints 50
is illegal
prints 045.926

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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.

ONLY
SINGLE
UNIQUE
DISTINCT

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

ALTER
REMOVE
COLLAPSE
DELETE

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Introduction to SQL
Count function in SQL returns the number of

values.
groups.
columns.
distinct values.

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Introduction to SQL
Each index consumes extra storage space and also requires overhead maintenance time whenever indexed data change value.

True
False

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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.

EQUIJOIN
NON-EQUIJOIN
NATURAL JOIN
OUTER JOIN

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