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Introduction to SQL

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

prints 045.926
prints 50
prints garbage
is illegal

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Introduction to SQL
Which SQL keyword is used to retrieve only unique values?

UNIQUE
DISTINCT
DIFFERENT
DISTINCTIVE

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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
The result of a SQL SELECT statement is a ________ .

report
form
table
file

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Introduction to SQL
________ was adopted as a national standard by ANSI in 1992.

Oracle
SQL
Microsoft Access
DBase

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Introduction to SQL
Table employee has 10 records. It has a non-NULL SALARY column which is also UNIQUE.The SQL statementSELECT COUNT(*) FROM employee WHERE SALARY > ALL (SELECT SALARY FROM EMPLOYEE);prints

9
5
0
10

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