Use view to wrap complex select statement : Filter View « View « Oracle PL/SQL Tutorial

Oracle PL/SQL Tutorial
1. Introduction
2. Query Select
3. Set
4. Insert Update Delete
5. Sequences
6. Table
7. Table Joins
8. View
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10. SQL Data Types
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13. Date Timestamp Functions
14. Numerical Math Functions
15. Conversion Functions
16. Analytical Functions
17. Miscellaneous Functions
18. Regular Expressions Functions
19. Statistical Functions
20. Linear Regression Functions
21. PL SQL Data Types
22. PL SQL Statements
23. PL SQL Operators
24. PL SQL Programming
25. Cursor
26. Collections
27. Function Procedure Packages
28. Trigger
29. SQL PLUS Session Environment
30. System Tables Data Dictionary
31. System Packages
32. Object Oriented
33. XML
34. Large Objects
35. Transaction
36. User Privilege
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Oracle PL/SQL Tutorial » View » Filter View 
8. 8. 9. Use view to wrap complex select statement
SQL>
SQL> create table employee
  2          (
  3           empl_no                integer         primary key
  4          ,lastname               varchar2(20)    not null
  5          ,firstname              varchar2(15)    not null
  6          ,midinit                varchar2(1)
  7          ,street                 varchar2(30)
  8          ,city                   varchar2(20)
  9          ,state                  varchar2(2)
 10          ,zip                    varchar2(5)
 11          ,zip_4                  varchar2(4)
 12          ,area_code              varchar2(3)
 13          ,phone                  varchar2(8)
 14          ,company_name           varchar2(50));

Table created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(1,'Jones','Joe','J','10 Ave','New York','NY','11111','1111','111', '111-1111','A Company');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(2,'Smith','Sue','J','20 Ave','New York','NY','22222','2222','222', '222-111','B Company');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(3,'Anderson','Peggy','J','500 St','New York','NY','33333','3333','333', '333-3333','C Company');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(4,'Andy','Jill', null,'93St','New York','NY','44444','4444','212', '634-7733','D Company');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(5,'OK','Carl','L','19 Drive','New York','NY','55555','3234','212', '243-4243','E Company');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(6,'Peter','Jee','Q','38 Ave','New York','NY','66666','4598','212', '454-5443','F Inc');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(7,'Baker','Paul','V','738 St.','Queens','NY','77777','3842','718', '664-4333','G Inc');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(8,'Young','Steve','J','388 Ave','New York','NY','88888','3468','212', '456-4566','H Associates Inc');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(9,'Mona','Joe','T','9300 Ave','Kansas City','MO','99999','3658','415', '456-4563','J Inc');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(10,'Hackett','Karen','S','Kings Rd. Apt 833','Bellmore','NY','61202','3898','516', '767-5677','AA Inc');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(11,'Bob','Jack','S','12 Giant Rd.','Newark','NJ','27377','3298','908', '123-7367','Z Associates');

row created.

SQL>
SQL>
SQL>
SQL> create view phone_list as
  2  select firstname || ' ' || midinit || '. ' || lastname as "Name",
  3   '(' || area_code || ')' || phone as "Telephone#"
  4  from employee;



SQL>
SQL> drop view phone_list ;

View dropped.

SQL>
SQL> drop table employee;

Table dropped.

SQL>
8. 8. Filter View
8. 8. 1. Create a view with condition
8. 8. 2. Creating a simple filtering view
8. 8. 3. Creating a view that joins tables
8. 8. 4. Top 'N' analysis
8. 8. 5. Query a filtering view
8. 8. 6. Create a view for employee and its course during
8. 8. 7. Use view to simplify the query
8. 8. 8. Create a view to link two table together
8. 8. 9. Use view to wrap complex select statement
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