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Questions and Answers
What are stored procedures?
What are stored procedures?
What is the primary benefit of using stored procedures?
What is the primary benefit of using stored procedures?
In what way do stored procedures contribute to database performance?
In what way do stored procedures contribute to database performance?
What is the syntax for creating procedures in PL/SQL?
What is the syntax for creating procedures in PL/SQL?
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What is the purpose of the IS keyword in PL/SQL procedure creation?
What is the purpose of the IS keyword in PL/SQL procedure creation?
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What is the syntax for declaring a parameter in a PL/SQL procedure?
What is the syntax for declaring a parameter in a PL/SQL procedure?
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What is a key difference between a procedure and a function in PL/SQL?
What is a key difference between a procedure and a function in PL/SQL?
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Which of the following is true about PL/SQL functions?
Which of the following is true about PL/SQL functions?
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What is a characteristic of PL/SQL procedures?
What is a characteristic of PL/SQL procedures?
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Where can procedures be called in PL/SQL?
Where can procedures be called in PL/SQL?
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How do you call a procedure in a PL/SQL block?
How do you call a procedure in a PL/SQL block?
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What is the correct syntax for invoking a PL/SQL procedure outside a block in SQL*Plus?
What is the correct syntax for invoking a PL/SQL procedure outside a block in SQL*Plus?
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What type of parameters can be used in PL/SQL procedures?
What type of parameters can be used in PL/SQL procedures?
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What is the purpose of IN parameters in PL/SQL procedures?
What is the purpose of IN parameters in PL/SQL procedures?
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What is the syntax for procedures with IN parameters in PL/SQL?
What is the syntax for procedures with IN parameters in PL/SQL?
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What is the purpose of using IN parameters in PL/SQL procedures?
What is the purpose of using IN parameters in PL/SQL procedures?
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What is the default mode for a parameter if not provided in PL/SQL?
What is the default mode for a parameter if not provided in PL/SQL?
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When declaring a parameter in PL/SQL, what can you not provide?
When declaring a parameter in PL/SQL, what can you not provide?
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What is a function in PL/SQL?
What is a function in PL/SQL?
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What is the correct syntax for invoking a PL/SQL function?
What is the correct syntax for invoking a PL/SQL function?
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What must the variable receiving data from a function have in terms of data type and precision?
What must the variable receiving data from a function have in terms of data type and precision?
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Where can a function be called in PL/SQL?
Where can a function be called in PL/SQL?
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What is the correct syntax for declaring a function in PL/SQL with an IN parameter?
What is the correct syntax for declaring a function in PL/SQL with an IN parameter?
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What is the purpose of using an IN parameter in a PL/SQL function?
What is the purpose of using an IN parameter in a PL/SQL function?
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What does the provided SQL code do?
What does the provided SQL code do?
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How is a function called in this exa,ple
How is a function called in this exa,ple
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What does the provided SQL code do?
What does the provided SQL code do?
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What is the purpose of the OUT parameter mode in PL/SQL procedures?
What is the purpose of the OUT parameter mode in PL/SQL procedures?
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What is the purpose of the IN OUT parameter mode in PL/SQL procedures?
What is the purpose of the IN OUT parameter mode in PL/SQL procedures?
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Why can't the IN parameter be assigned any value in PL/SQL?
Why can't the IN parameter be assigned any value in PL/SQL?
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What happens if an attempt is made to assign a value to an IN parameter within a PL/SQL procedure?
What happens if an attempt is made to assign a value to an IN parameter within a PL/SQL procedure?
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Can an out parameter pass a value during a function call?
Can an out parameter pass a value during a function call?
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Can we pass a value to an IN parameter when calling a PL/SQL function?
Choices
Can we pass a value to an IN parameter when calling a PL/SQL function? Choices
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Can the IN/OUT parameter provide a target for assignment?
Can the IN/OUT parameter provide a target for assignment?
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Can we pass a value to an OUT parameter when calling a PL/SQL function?
Can we pass a value to an OUT parameter when calling a PL/SQL function?
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Can we pass a value to an IN parameter when calling a PL/SQL function?
Can we pass a value to an IN parameter when calling a PL/SQL function?
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Can the IN/OUT parameter provide a target for assignment?
Choices
Can the IN/OUT parameter provide a target for assignment? Choices
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What is the primary purpose of modular code?
What is the primary purpose of modular code?
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What are the benefits of modular code?
What are the benefits of modular code?
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What happens when you drop a stored procedure in PL/SQL?
What happens when you drop a stored procedure in PL/SQL?
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What happens when you recreate a stored procedure in PL/SQL?
What happens when you recreate a stored procedure in PL/SQL?
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What happens when you drop a function in PL/SQL?
What happens when you drop a function in PL/SQL?
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What happens when you drop and recreate a stored function that relies on a procedure, a view, and members having access to that function in PL/SQL?
What happens when you drop and recreate a stored function that relies on a procedure, a view, and members having access to that function in PL/SQL?
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What is the impact of dropping a stored function in PL/SQL?
What is the impact of dropping a stored function in PL/SQL?
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What happens when you create or replace a stored function that relies on a procedure, a view, and members having access to that function in PL/SQL?
What happens when you create or replace a stored function that relies on a procedure, a view, and members having access to that function in PL/SQL?
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How can you compile a drop procedure in PL/SQL after a new procedure was created of the same name?
How can you compile a drop procedure in PL/SQL after a new procedure was created of the same name?
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What happens when you drop a function in PL/SQL?
What happens when you drop a function in PL/SQL?
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What is the purpose of the 'CREATE OR REPLACE' statement in PL/SQL?
What is the purpose of the 'CREATE OR REPLACE' statement in PL/SQL?
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Which table provides information about the source code of the user-defined objects in PL/SQL?
Which table provides information about the source code of the user-defined objects in PL/SQL?
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Which table contains information about the dependencies of user-defined objects in PL/SQL?
Which table contains information about the dependencies of user-defined objects in PL/SQL?
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Which table stores information about the user-defined objects in the database in PL/SQL?
Which table stores information about the user-defined objects in the database in PL/SQL?
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Which dictionary in PL/SQL contains information about the dependencies of user-defined objects?
Which dictionary in PL/SQL contains information about the dependencies of user-defined objects?
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Which dictionary in PL/SQL stores information about the user-defined objects themselves?
Which dictionary in PL/SQL stores information about the user-defined objects themselves?
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Which dictionary in PL/SQL stores information about the errors
Which dictionary in PL/SQL stores information about the errors
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What should be considered when storing a function inside a select statement in SQL?
What should be considered when storing a function inside a select statement in SQL?
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In the context of a SQL statement, what is the time complexity of a PL/SQL function compared to a native SQL function of the same procedure?
In the context of a SQL statement, what is the time complexity of a PL/SQL function compared to a native SQL function of the same procedure?
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What is a restriction on a function when called within a SQL query?
What is a restriction on a function when called within a SQL query?
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What is a restriction on a function when called within a SQL query?
What is a restriction on a function when called within a SQL query?
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What is a restriction against constraints on a function?
What is a restriction against constraints on a function?
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What is a restriction on a function in terms of Data Definition Language (DDL) operations?
What is a restriction on a function in terms of Data Definition Language (DDL) operations?
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Study Notes
Stored Procedures
- A stored procedure is a reusable program that performs a specific task.
- The primary benefit of using stored procedures is improved performance, as they reduce network traffic and minimize the amount of data that needs to be transferred.
Creating Procedures in PL/SQL
- The syntax for creating procedures in PL/SQL is
CREATE PROCEDURE procedure_name (parameters) AS BEGIN ... END;
- The IS keyword in PL/SQL procedure creation is used to specify the procedure body.
Parameters in PL/SQL Procedures
- Parameters in PL/SQL procedures can be IN, OUT, or IN OUT.
- The syntax for declaring a parameter in a PL/SQL procedure is
parameter_name [IN/OUT/IN OUT] datatype
- The default mode for a parameter if not provided in PL/SQL is IN.
Functions in PL/SQL
- A function in PL/SQL is a reusable program that returns a value.
- The correct syntax for invoking a PL/SQL function is
FUNCTION function_name (parameters) RETURN datatype AS BEGIN ... END;
- The variable receiving data from a function must have the same data type and precision.
Modular Code
- The primary purpose of modular code is to improve code reusability and maintainability.
- The benefits of modular code include improved readability, easier debugging, and reduced code duplication.
Managing Stored Procedures and Functions in PL/SQL
- When a stored procedure is dropped, the privileges associated with it are also dropped.
- When a function is dropped, the privileges associated with it are also dropped, and any dependent objects become invalid.
- When a stored procedure or function is recreated, the privileges associated with it are restored.
PL/SQL Dictionaries
- The
USER_SOURCE
table provides information about the source code of user-defined objects in PL/SQL. - The
USER_DEPENDENCIES
table contains information about the dependencies of user-defined objects in PL/SQL. - The
USER_OBJECTS
table stores information about the user-defined objects in the database in PL/SQL.
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Description
Stored Procedures Quiz: Test your knowledge of prepared SQL code that can be saved for reuse. Explore the concepts of stored procedures, their benefits, and how they are used in database management. Challenge yourself with questions on creating, modifying, and executing stored procedures.