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Introduction to SQL

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

COLLAPSE
ALTER
REMOVE
DELETE

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Introduction to SQL
Which of the following is a SQL aggregate function?

LEN
AVG
LEFT
JOIN

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Introduction to SQL
Let the statementSELECT column1 FROM myTable;return 10 rows. The statementSELECT ALL column1 FROM myTable;will return

less than 10 rows
None of these
more than 10 rows
exactly 10 rows

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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 only be used with two tables.
can always be duplicated by a join.

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Introduction to SQL
The benefits of a standard relational language include which of the following?

Applications are not needed
All of these
Increased dependence on a single vendor
Reduced training costs

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Introduction to SQL
What is the meaning of LIKE '%0%0%'

Feature has two 0's in it, at any position
Feature ends with two 0's
Feature begins with two 0's
Feature has more than two 0's

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