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Introduction to SQL

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

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

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Introduction to SQL
The wildcard asterisk (*) is the SQL-92 standard for indicating "any sequence of characters."

False
True

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

ALIGN BY
ORDER BY
SORT BY
GROUP BY

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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 HAVING clause acts like a WHERE clause, but it identifies groups that meet a criterion, rather than rows.

True
False

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Introduction to SQL
SQL is a programming language.

True
False

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