Changing column name and Datatype in Table in Sql

Title:How to Change column name and datatype in SQL server

Description:
This kind scenario will happen when we have to change the data base filed name or data type as per requirement.As per my application i need change the column type to Null.The SQL server provides a default stored procedure "sp_changename",which can make the things easier.Here i have used ALTER command To change the column name and data type in the table

Syntax:

Alter table TableName alter column ColumnName DataType NULL/NOT NULL
EXEC sp_changename        
@objname = ' TableName. OldColumnName’,
@newname = 'New ColumnName',
@objtype = 'COLUMN'

Example:

Alter table Organisation alter column name int null
EXEC sp_changename
@objname = 'Oraganisation.name',
@newname = 'name',
@objtype = 'COLUMN'