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Introduction to SQL

Introduction to SQL
Which SQL keyword is used to retrieve a maximum value?

UPPER
MOST
TOP
MAX

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Introduction to SQL
The FROM SQL clause is used to...

specify range for search condition
specify search condition
None of these
specify what table we are selecting or deleting data FROM

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Introduction to SQL
DISTINCT and its counterpart, ALL, can be used more than once in a SELECT statement.

False
True

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Introduction to SQL
Which of the following SQL commands is used to retrieve data?

JOIN
DELETE
SELECT
INSERT

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Introduction to SQL
Which of the following SQL query is correct for selecting the name of staffs from 'staffinfo' table where salary is 10,000 or 25,000?

SELECT name FROM staffinfo WHERE salary IN (10000, 25000);
SELECT name FROM staffinfo WHERE salary BETWEEN 10000 AND 25000;
Both A and B
None of these

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Introduction to SQL
The command to remove rows from a table 'CUSTOMER' is:

UPDATE FROM CUSTOMER ...
REMOVE FROM CUSTOMER ...
DROP FROM CUSTOMER ...
DELETE FROM CUSTOMER WHERE ...

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