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Answer and provide 1 reference.
Advanced SQL and PL/SQL
Extracting and interpreting data can be very valuable to an
organization. Describe the importance of using sub queries in a
database system. Provide at least two business case scenarios to
support your response.
A good IT professional is able to be versatile in SQL
programming styles. Identify at least two possible advantages of
utilizing PL/SQL instead of standard SQL Syntax. Explain
whether either syntax provides enhanced code processing
capabilities with examples.
Respond to this discussion Response:
Sub queries are important and advantageous because they are
structured in such a way that they isolate each part of the
statement, and perform the same operation that would ordinarily
require complex and joins and unions and they ae easier to
read. Base on how the database optimizer processes them can
cause them the take longer to execute. The Structured Query
Language (SQL) provide the basis for sub queries due to its
easily readable structure. They provide a powerful means to
combine data from two tables into a single result. Sub queries
are also known as nested query or inner query such as defined
by Covrett stating that “A subquery is a "SELECT" statement
within the "WHERE" or "HAVING" clause of an outer
"INSERT," "UPDATE," "MERGE" or "DELETE" statement. The
subquery also is called the "inner query" or "inner select." The
subquery may have a "FROM" clause with one or more tables
and may optionally have a "WHERE," "GROUP BY" or
"HAVING" clause. It is always enclosed in parenthesis.”
PL/SQL is an extension of Structured Query Language (SQL)
that is used in oracle. It allows the programmer to write code in
a procedural format. It’s purpose is to combine database
language and procedural programming language.
Advantages of PL/SQL:
Tight Integration with SQL.
High Performance.
High Productivity.
Portability.
Scalability.
Manageability.
Support for Object-Oriented Programming.
Support for Developing Web Applications.
Covrett, L. What Are the Advantages & Disadvantages of a Join
or a Subquery? https://www.techwalla.com/articles/what-are-
the-advantages-disadvantages-of-a-join-or-a-subquery
Answer and provide 1 reference. Advanced SQL and PLSQLE.docx
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Answer and provide 1 reference. Advanced SQL and PLSQLE.docx

  • 1. Answer and provide 1 reference. Advanced SQL and PL/SQL Extracting and interpreting data can be very valuable to an organization. Describe the importance of using sub queries in a database system. Provide at least two business case scenarios to support your response. A good IT professional is able to be versatile in SQL programming styles. Identify at least two possible advantages of utilizing PL/SQL instead of standard SQL Syntax. Explain whether either syntax provides enhanced code processing capabilities with examples. Respond to this discussion Response: Sub queries are important and advantageous because they are structured in such a way that they isolate each part of the statement, and perform the same operation that would ordinarily require complex and joins and unions and they ae easier to read. Base on how the database optimizer processes them can cause them the take longer to execute. The Structured Query Language (SQL) provide the basis for sub queries due to its easily readable structure. They provide a powerful means to combine data from two tables into a single result. Sub queries are also known as nested query or inner query such as defined by Covrett stating that “A subquery is a "SELECT" statement within the "WHERE" or "HAVING" clause of an outer "INSERT," "UPDATE," "MERGE" or "DELETE" statement. The
  • 2. subquery also is called the "inner query" or "inner select." The subquery may have a "FROM" clause with one or more tables and may optionally have a "WHERE," "GROUP BY" or "HAVING" clause. It is always enclosed in parenthesis.” PL/SQL is an extension of Structured Query Language (SQL) that is used in oracle. It allows the programmer to write code in a procedural format. It’s purpose is to combine database language and procedural programming language. Advantages of PL/SQL: Tight Integration with SQL. High Performance. High Productivity. Portability. Scalability. Manageability. Support for Object-Oriented Programming. Support for Developing Web Applications. Covrett, L. What Are the Advantages & Disadvantages of a Join or a Subquery? https://www.techwalla.com/articles/what-are- the-advantages-disadvantages-of-a-join-or-a-subquery