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Introduction to SQL

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

QUERY
SELECT
READ
None of these

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Introduction to SQL
The keyword LIKE can be used in a WHERE clause to refer to a range of values.

True
False

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Introduction to SQL
Which of the following is a SQL aggregate function?

LEN
AVG
JOIN
LEFT

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

COMMIT
DELETE
TRUNCATE
ROLLBACK

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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
The SQL statementSELECT SUBSTR('abcdefghij', INSTR('123321234', '2', 3, 2), 2) FROM DUAL;prints

ab
23
gh
bc

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