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Introduction to SQL

Introduction to SQL
Which SQL keyword is used to retrieve only unique values?

DISTINCTIVE
UNIQUE
DISTINCT
DIFFERENT

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Introduction to SQL
The rows of the result relation produced by a SELECT statement can be sorted, but only by one column.

True
False

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Introduction to SQL
The qualifier DISTINCT must be used in an SQL statement when we want to eliminate duplicate rows.

False
True

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Introduction to SQL
How to select all data from student table starting the name from letter 'r'?

SELECT * FROM student WHERE name LIKE '%r';
SELECT * FROM student WHERE name LIKE 'r%';
SELECT * FROM student WHERE name LIKE '_r%';
SELECT * FROM student WHERE name LIKE '%r%';

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Introduction to SQL
The command to eliminate a table from a database is:

DELETE TABLE CUSTOMER;
REMOVE TABLE CUSTOMER;
DROP TABLE CUSTOMER;
UPDATE TABLE CUSTOMER;

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Introduction to SQL
The format SELECT-FROM-WHERE is the fundamental framework of SQL SELECT statements.

False
True

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