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Introduction to SQL

Introduction to SQL
The SQL statement that queries or reads data from a table is ________ .

READ
QUERY
SELECT
None of these

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Introduction to SQL
The SELECT command, with its various clauses, allows users to query the data contained in the tables and ask many different questions or ad hoc queries.

True
False

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Introduction to SQL
SQL is:

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

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Introduction to SQL
The SELECT statement SELECT 'Hi' FROM DUAL WHERE NULL = NULL; Outputs

Nothing
Hi
TRUE
FLASE

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Introduction to SQL
Which of the following SQL commands can be used to add data to a database table?

APPEND
UPDATE
ADD
INSERT

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Introduction to SQL
Table Employee has 10 records. It has a non-NULL SALARY column which is also UNIQUE.The SQL statementSELECT COUNT(*) FROM Employee WHERE SALARY > ANY (SELECT SALARY FROM EMPLOYEE);prints

10
0
5
9

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