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Introduction to SQL

Introduction to SQL
Which command undo all the updates performed by the SQL in the transaction?

TRUNCATE
ROLLBACK
DELETE
COMMIT

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Introduction to SQL
A subquery in an SQL SELECT statement:

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

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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.

NON-EQUIJOIN
OUTER JOIN
NATURAL JOIN
EQUIJOIN

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

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

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Introduction to SQL
The SQL statement: SELECT Number1 + Number 2 AS Total FROM NUMBER_TABLE; adds two numbers from each row together and lists the results in a column named Total.

False
True

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Introduction to SQL
Which of the following are the five built-in functions provided by SQL?

SUM, AVG, MIN, MAX, MULT
COUNT, SUM, AVG, MAX, MIN
SUM, AVG, MULT, DIV, MIN
SUM, AVG, MIN, MAX, NAME

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