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Introduction to SQL

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

SINGLE
ONLY
UNIQUE
DISTINCT

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Introduction to SQL
Which is the subset of SQL commands used to manipulate Oracle Database structures, including tables?

Data Manipulation Language(DML)
None
Both of above
Data Definition Language(DDL)

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Introduction to SQL
Which command undo all the updates performed by the SQL in the transaction?

DELETE
ROLLBACK
TRUNCATE
COMMIT

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

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

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Introduction to SQL
If you are going to use a combination of three or more AND and OR conditions, it is often easier to use the NOT and NOT IN operators.

True
False

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Introduction to SQL
SQL is:

a DBMS.
an operating system.
a data sublanguage.
a programming language.

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