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Introduction to SQL

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

DELETE
INSERT
JOIN
SELECT

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Introduction to SQL
SQL provides the AS keyword, which can be used to assign meaningful column names to the results of queries using the SQL built-in functions.

True
False

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

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

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

6789
2345
456789
1234

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

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

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

SORT BY
ORDER
SORT
ORDER BY

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