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Introduction to SQL

Introduction to SQL
SUM, AVG, MIN, and MAX can only be used with numeric columns.

True
False

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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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Introduction to SQL
Which of the following is valid SQL for an Index?

CREATE INDEX ID;
REMOVE INDEX ID;
CHANGE INDEX ID;
ADD INDEX ID;

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Introduction to SQL
Which of the following is illegal?

SELECT SYSDATE - SYSDATE FROM DUAL;
SELECT SYSDATE - (SYSDATE + 2) FROM DUAL;
SELECT SYSDATE - (SYSDATE - 2) FROM DUAL;
None of these

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

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

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Introduction to SQL
The Microsoft Access wildcards are ____ and ____ .

percent sign (%); underscore (_)
underscore(_); question mark (?)
asterisk (*); percent sign (%)
question mark (?); asterisk (*)

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