Count distinct with group by : Group By « Query Select « 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
9. Index
10. SQL Data Types
11. Character String Functions
12. Aggregate Functions
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
Java
Java Tutorial
Java Source Code / Java Documentation
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Oracle PL/SQL Tutorial » Query Select » Group By 
2. 5. 18. Count distinct with group by
SQL> create table offerings
  2  course     VARCHAR2(6)
  3  , begindate  DATE
  4  , Coder      NUMBER(4)
  5  , location   VARCHAR2(8)
  6  ;

Table created.

SQL> insert into offerings values ('SQL',date '2009-04-12',13,'DALLAS' );

row created.

SQL> insert into offerings values ('OAU',date '2009-08-10',4,'CHICAGO');

row created.

SQL> insert into offerings values ('SQL',date '2009-10-04',1,'SEATTLE');

row created.

SQL> insert into offerings values ('SQL',date '2009-12-13',1,'DALLAS' );

row created.

SQL> insert into offerings values ('JAV',date '2009-12-13',4,'SEATTLE');

row created.

SQL> insert into offerings values ('XML',date '2000-02-03',1,'DALLAS' );

row created.

SQL> insert into offerings values ('JAV',date '2000-02-01',11,'DALLAS' );

row created.

SQL> insert into offerings values ('PLS',date '2000-09-11',8,'DALLAS' );

row created.

SQL> insert into offerings values ('XML',date '2000-09-18',NULL,'SEATTLE');

row created.

SQL> insert into offerings values ('OAU',date '2000-09-27',13,'DALLAS' );

row created.

SQL> insert into offerings values ('ERM',date '2001-01-15',NULL, NULL    );

row created.

SQL> insert into offerings values ('PRO',date '2001-02-19',NULL,'DALLAS' );

row created.

SQL> insert into offerings values ('RSD',date '2001-02-24',8,'CHICAGO');

row created.

SQL>
SQL> select Coder
  2  ,      count(distinct course)
  3  ,      count(*)
  4  from   offerings
  5  group  by Coder;

     CODER COUNT(DISTINCTCOURSE)   COUNT(*)
---------- --------------------- ----------
         1                     2          3
         4                     2          2
         8                     2          2
        11                     1          1
        13                     2          2
                               3          3

rows selected.

SQL>
SQL>
SQL> drop table offerings;

Table dropped.
2. 5. Group By
2. 5. 1. Using Multiple Columns in a Group
2. 5. 2. GROUP by with NULL value
2. 5. 3. Use the aggregate functions with the GROUP BY clause
2. 5. 4. By default, GROUP BY sorts the rows in ascending order
2. 5. 5. Using the ORDER BY Clause to Sort Groups
2. 5. 6. You don't have to include the columns used in the GROUP BY clause in your SELECT clause
2. 5. 7. GROUP BY used on a column without the column name appearing in the result set
2. 5. 8. Any row-level variable (i.e., a column name) in the result set must be mentioned in the GROUP BY clause for the query to make sense.
2. 5. 9. Grouping at Multiple Levels
2. 5. 10. ORA-00979: not a GROUP BY expression
2. 5. 11. Getting Values and Subtotals in One Go
2. 5. 12. Getting Values and Subtotals in One Go with COALESCE
2. 5. 13. Getting Values and Subtotals in One Go with UNION
2. 5. 14. Group all ids with averager value more than
2. 5. 15. Group and count employeem and display only if its count is more than 4
2. 5. 16. Count employee, group by department id and job title
2. 5. 17. Count and group by department id
2. 5. 18. Count distinct with group by
2. 5. 19. Born after '1960-01-01', group by department number with count(*) >= 4;
2. 5. 20. Group by case
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.