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Introduction to SQL

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

TRUE
FLASE
Hi
Nothing

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Introduction to SQL
Find all the cities whose humidity is 89

SELECT humidity = 89 FROM weather;
SELECT city WHERE humidity = 89;
SELECT city FROM weather;
SELECT city FROM weather WHERE humidity = 89;

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Introduction to SQL
________ was adopted as a national standard by ANSI in 1992.

Microsoft Access
SQL
Oracle
DBase

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Introduction to SQL
In SQL, which of the following is not a data definition language commands?

UPDATE
REVOKE
RENAME
GRANT

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

DELETE
ROLLBACK
COMMIT
TRUNCATE

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Introduction to SQL
The FROM SQL clause is used to...

specify what table we are selecting or deleting data FROM
specify search condition
specify range for search condition
None of these

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