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Introduction to SQL

Introduction to SQL
Which SQL statement is used to update data in a database?

UPDATE
MODIFY
SAVE AS
SAVE

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Introduction to SQL
To remove duplicate rows from the results of an SQL SELECT statement, the ________ qualifier specified must be included.

UNIQUE
SINGLE
DISTINCT
ONLY

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Introduction to SQL
Find all the cities whose humidity is 89

SELECT city FROM weather;
SELECT city FROM weather WHERE humidity = 89;
SELECT city WHERE humidity = 89;
SELECT humidity = 89 FROM weather;

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

SORT
SORT BY
ORDER BY
ORDER

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

456789
2345
1234
6789

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Introduction to SQL
The condition in a WHERE clause can refer to only one value.

True
False

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