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Advanced SQL

Advanced SQL
The joining technique is useful when data from several relations are to be retrieved and displayed and the relationships are not necessarily nested.

True
False

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Advanced SQL
Which of the following statements is true concerning routines and triggers?

Both run automatically.
Both are stored in the database.
Both have to be called to operate.
Both consist of procedural code.

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Advanced SQL
The most frequently used relational operation, which brings together data from two or more related tables into one resultant table, is called an equi-join.

False
True

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

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

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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.

True
False

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Advanced SQL
The following SQL is which type of join: SELECT CUSTOMER_T. CUSTOMER_ID, ORDER_T. CUSTOMER_ID, NAME, ORDER_ID FROM CUSTOMER_T,ORDER_T ;

Outer join
Natural join
Cartesian join
Equi-join

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