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Introduction to SQL

Introduction to SQL
Which one of the following sorts rows in SQL?

ORDER BY
SORT BY
ALIGN BY
GROUP BY

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

prints garbage
is illegal
prints 045.926
prints 50

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Introduction to SQL
The SELECT command, with its various clauses, allows users to query the data contained in the tables and ask many different questions or ad hoc queries.

True
False

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Introduction to SQL
A SELECT statement within another SELECT statement and enclosed in square brackets ([...]) is called a subquery.

True
False

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Introduction to SQL
The SQL statementSELECT SUBSTR('abcdefghij', INSTR('123321234', '2', 3, 2), 2) FROM DUAL;prints

23
gh
bc
ab

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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.

True
False

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