How to use distinct keyword in sql server

Distinct keyword in SQL Server: Distinct keyword display the unique record from SQL Server table. It removes duplicate value(s) and display unique value(s).

SQL Server distinct keyword syntax, without SQL select where statement:

Select distinct COLUMN_NAME From TABLE_NAME

SQL Server distinct keyword syntax, with SQL select where command:
Select distinct COLUMN_NAME From TABLE_NAME Where [COLUMN_NAME]=['VALUE']

Description:
             Select: SQL Keyword.
             distinct: SQL keyword.             
        COLUMN_NMME: Column name.
             From: SQL Keyword.
             TABLE_NAME: Name of table.
             Where: SQL keyword.
            ['VALUE'] : User defined value.



Here is a Table ItemDetails

ItemCode	ItemName	ManufactureCompany	ItemSerialNo	ItemCategory	ItemQuantity	ItemPrice	ProductCountry
1	Samsung Mobile	Samsung	S12345	Mobile	500	240	Korea
2	Samsung Pro	Samsung	SP1234	Mobile	100	300	Korea
3	Samsung Headphone	Samsung	SH2345	Headphone	50	50	Korea
4	iPhone	iPone	iP12345	Mobile	1000	500	United Stat
5	Apple Mobile	Apple	A12345	Mobile	200	300	United Stat
6	Apple Computer	Apple	A12343	Computer	200	400	United Stat
7	Apple Macbook	Apple	AM2345	Macbook	50	600	United Stat
8	Dell Computer	DELL	D02345	Computer	200	240	United Stat
9	Dell Laptop	DELL	DL2345	Laptop	30	240	United Stat
10	Apple Laptop	Apple	AL2345	Laptop	500	100	United Stat
11	Apple Headphone	Apple	AH2345	Headphone	50	20	United Stat
12	Sony Camera	Sony	SN2345	Camera	200	240	Japan
13	Sony Headphone	Sony	SNH345	Headphone	500	50	Japan
14	Ascer Computer	Ascer	AC2345	Computer	100	600	China
16	Borother Printer	Brother	B12345	Printer	200	200	China
17	Ascer Printer	Ascer	AP2345	Printer	200	150	China
18	Brother Photocopy	Brother	BP2345	Printer	20	150	China
19	Brother Multi Printer	Brother	BM243	Photocopy	NULL	NULL	India

Now,

Select distinct ItemCategory from ItemDetails

Result:

ItemCategory

Camera

Computer

Headphone

Laptop

Macbook

Mobile

Photocopy

Printer

Select distinct ManufactureCompany from ItemDetails

Result:

ManufactureCompany

Apple

Ascer

Brother

DELL

iPone

Samsung

Sony

Select distinct ItemCategory from ItemDetails where ProductCountry='United Stat'

Result:

ItemCategory

Computer

Headphone

Laptop

Macbook

Mobile

Distinct keyword in video






Distinct keyword in Image