Changing Rows to Columns Using PIVOT - SQL Server by serverku

During working with one logic, I got a chance to work with PIVOT operation. Sometime we need do require row data as a column in our custom logic, then we can use some temp table and then populate aggregate data in a temp table. But With PIVOT we can do it very easily. Let me prepare small example and explain as how how can we use PIVOT and get row data as a column.

Before going ahead to run the script of Pivot, we will create a database and table objects.

CREATE DATABASE DEMO
GO

USE DEMO
GO

-- Creating table for demo
IF (object_id('TblPivot','U') > 0)
DROP TABLE TblPivot

CREATE TABLE TblPivot
(
ItemCode int,
ItemName varchar(100),
ItemColour varchar(50)
)
GO

-- Inerting some sample records
INSERT INTO TblPivot
SELECT 1,'Samsung Mobile','Red'
UNION ALL
SELECT 2,'Nokia Mobile','Blue'
UNION ALL
SELECT 3,'Nokia Mobile','Green'
UNION ALL
SELECT 4,'Motorola Mobile','Red'
UNION ALL
SELECT 5,'Samsung Mobile','Green'
UNION ALL
SELECT 2,'Nokia Mobile','Blue'
UNION ALL
SELECT 1,'Samsung Mobile','Red'
UNION ALL
SELECT 2,'Nokia Mobile','Blue'
GO

Now we will check the original table data and aggregated data using Pivot. So we will run both scripts for the same.

-- Getting table data
SELECT 
ItemCode, 
ItemName, 
ItemColour
from TblPivot
GO

-- Getting agreegated data using Pivot and converted rows to column
SELECT
*
 FROM
 (
    SELECT 
 ItemCode, 
 ItemName, 
 ItemColour
    FROM TblPivot
 ) AS P
PIVOT
(
  Count(ItemName) FOR ItemColour IN (Red, Blue, Green)
) AS pv
GO

You can review here and see how The PIVOT is working. Let me share your experience with PIVOT operation.