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Introduction to SQL

Introduction to SQL
What operator tests column for the absence of data?

EXISTS operator
None of these
NOT operator
IS NULL operator

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Introduction to SQL
Which of the SQL statements is correct?

SELECT Username, Password WHERE Username = 'user1'
SELECT Username AND Password FROM Users
SELECT Username, Password FROM Users
None of these

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

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

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Introduction to SQL
Which of the following do you need to consider when you make a table in SQL?

Default values
All of these
Data types
Primary keys

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Introduction to SQL
The format SELECT-FROM-WHERE is the fundamental framework of SQL SELECT statements.

True
False

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Introduction to SQL
A dynamic view is one whose contents materialize when referenced.

True
False

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