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Introduction to SQL

Introduction to SQL
The SQL statementSELECT ROUND(45.926, -1) FROM DUAL;

is illegal
prints garbage
prints 045.926
prints 50

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Introduction to SQL
Which of the following command makes the updates performed by the transaction permanent in the database?

TRUNCATE
COMMIT
DELETE
ROLLBACK

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

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

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Introduction to SQL
'AS' clause is used in SQL for

Projection operation.
Selection operation.
Rename operation.
Join operation.

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

True
False

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Introduction to SQL
............. joins two or more tables based on a specified column value not equaling a specified column value in another table.

OUTER JOIN
EQUIJOIN
NATURAL JOIN
NON-EQUIJOIN

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