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Advanced SQL

Advanced SQL
Subqueries can be nested multiple times.

False
True

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Advanced SQL
Outer join is the same as equi-join, except one of the duplicate columns is eliminated in the result table.

False
True

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Advanced SQL
Triggers are stored blocks of code that have to be called in order to operate.

False
True

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Advanced SQL
Which of the following is true concerning systems information in an RDBMS?

All of these
This information often cannot be updated by a user.
RDBMS store database definition information in system-created tables.
This information can be accessed using SQL.

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Advanced SQL
Which of the following is true concerning a procedure?

You do not create them with SQL.
They include procedural and SQL statements.
They do not need to have a unique name.
They are the same thing as a function.

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Advanced SQL
A transaction is the complete set of closely related update commands that must all be done, or none of them done, for the database to remain valid.

False
True

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