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

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Oracle PL/SQL Tutorial » Query Select » Group By

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

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