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Introduction to SQL

Introduction to SQL
COUNT(field_name) tallies only those rows that contain a value; it ignores all null values.

False
True

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Introduction to SQL
SQL data definition commands make up a(n) ________ .

DDL
XML
HTML
DML

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

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

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Introduction to SQL
Which of the following is the original purpose of SQL?

To define the data structures
All of these
To specify the syntax and semantics of SQL manipulation language
To specify the syntax and semantics of SQL data definition language

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Introduction to SQL
There is an equivalent join expression that can be substituted for all subquery expressions.

False
True

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

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

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