Categories:
.NET (961)
C (387)
C++ (185)
CSS (84)
DBA (8)
General (31)
HTML (48)
Java (641)
JavaScript (220)
JSP (109)
JUnit (31)
MySQL (297)
Networking (10)
Oracle (562)
Perl (48)
Perl (9)
PHP (259)
PL/SQL (140)
RSS (51)
Software QA (28)
SQL Server (5)
Struts (20)
Unix (2)
Windows (3)
XHTML (199)
XML (59)
Other Resources:
How To Divide Query Output into Groups
How To Divide Query Output into Groups? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements
✍: FYIcenter.com
You can divide query output into multiple groups with the GROUP BY clause. It allows you specify a column as the grouping criteria, so that rows with the same value in the column will be considered as a single group. When the GROUP BY clause is specified, the select statement can only be used to return group level information. The following script gives you a good GROUP BY example:
SQL> SELECT department_id, MIN(salary), MAX(salary), 2 AVG(salary) FROM employees GROUP BY department_id; DEPARTMENT_ID MIN(SALARY) MAX(SALARY) AVG(SALARY) ------------- ----------- ----------- ----------- 100 6900 12000 8600 30 2500 11000 4150 7000 7000 7000 90 17000 24000 19333.3333 20 6000 13000 9500 70 10000 10000 10000 110 8300 12000 10150 50 2100 8200 3475.55556 ......
2007-04-20, 5110👍, 0💬
Popular Posts:
What are some advantages and disadvantages of Java Sockets? Advantages of Java Sockets: Sockets are ...
What are the core functionalities in XML .NET framework? Can you explain in detail those functionali...
What’s the difference between Unit testing, Assembly testing and Regression testing? Unit testing is...
How can I check for HTML errors? HTML validators check HTML documents against a formal definition of...
How To Use mysqlbinlog to View Binary Logs? - MySQL FAQs - Server Daemon mysqld Administration If yo...