16 Questions
What can be done if the overhead of the PL/SQL optimizer makes compilation of very large applications too slow?
Set the compilation parameter PLSQL_OPTIMIZE_LEVEL=1
When is dynamic SQL useful in PL/SQL programs?
When knowing at compile time the number and data types of input and output variables of a dynamic SQL statement
What is the most common cause of slowness in PL/SQL programs?
Slow SQL statements
What is native dynamic SQL?
A methodology for generating and running SQL statements at run time
How can you minimize the performance overhead of communication between PL/SQL and SQL?
Use set of PL/SQL features known as bulk SQL
In what cases is dynamic SQL particularly useful?
When writing general-purpose and flexible programs like ad hoc query systems
What is the purpose of tuning loops in PL/SQL applications?
To optimize the loops themselves and the code inside them
Why should functions not be invoked unnecessarily in queries?
To make the invocation as efficient as possible
What is the advantage of using data types like PLS_INTEGER, BINARY_FLOAT, and BINARY_DOUBLE?
They use hardware arithmetic for better performance
What does the FORALL statement in PL/SQL do?
Sends DML statements from PL/SQL to SQL in batches rather than one at a time
What is the purpose of bulk SQL in PL/SQL?
To minimize the performance overhead of communication between PL/SQL and SQL
Why should one avoid using data types in the NUMBER family?
To use hardware arithmetic for better performance
How can short-circuit evaluation be utilized in logical expressions in PL/SQL?
By putting least expensive conditional tests first in logical expressions
What is bulk binding in bulk SQL?
It binds an entire collection of values at once
What are obstacles to scaling up RDBMS as mentioned in the text?
Scaling Relational Databases Is Hard because todays business is digital.
What is an important consideration when using conditional expressions in PL/SQL?
Put least expensive conditional tests first to take advantage of short-circuit evaluation.
Learn about improving PL/SQL performance through the PL/SQL optimizer and tuning options. Understand how to adjust the compilation parameters for better optimization and performance. Explore candidates for tuning in PL/SQL to enhance efficiency.
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