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Introduction to SQL

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

prints 50
prints garbage
prints 045.926
is illegal

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Introduction to SQL
Which SQL keyword is used to sort the result-set?

ORDER BY
SORT
ORDER
SORT BY

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

SQL
DBase
Oracle
Microsoft Access

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Introduction to SQL
Indexes can usually be created for both primary and secondary keys.

True
False

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Introduction to SQL
The SQL statementSELECT SUBSTR('123456789', INSTR('abcabcabc', 'b'), 4) FROM DUAL;

1234
456789
2345
6789

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Introduction to SQL
COUNT(field_name) tallies only those rows that contain a value; it ignores all null values.

False
True

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