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Introduction to SQL

Introduction to SQL
ON UPDATE CASCADE ensures which of the following?

All of these
Data Integrity
Materialized Views
Normalization

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Introduction to SQL
The command to remove rows from a table 'CUSTOMER' is:

DELETE FROM CUSTOMER WHERE ...
REMOVE FROM CUSTOMER ...
DROP FROM CUSTOMER ...
UPDATE FROM CUSTOMER ...

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Introduction to SQL
The SQL WHERE clause:

Both A and B are correct.
limits the column data that are returned.
Neither A nor B are correct.
limits the row data are returned.

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Introduction to SQL
Which SQL statement is used to update data in a database?

SAVE AS
SAVE
MODIFY
UPDATE

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

Non-Equijoin
Equijoin
None of these
Self-Join

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Introduction to SQL
A subquery in an SQL SELECT statement:

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

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