Check out example codes for "how to rename columns in sql server". It will help you in understanding the concepts better.

Code Example 1

--The following example renames the column TerritoryID in the table Sales.SalesTerritory to TerrID in the AdventureWorks database.

EXEC sp_rename 'Sales.SalesTerritory.TerritoryID', 'TerrID', 'COLUMN';

Code Example 2

EXEC sp_rename 'Sales.SalesTerritory.TerritoryID', 'TerrID', 'COLUMN';

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