In This post Let we see how to create a Sparse Columns in SQL SERVER
A Sparse column is a optimised storage format to store NULL values, we can specify a table column as sparse by SPARSE attribute.
- It greatly reduces the space requirement for your table columns.
- It doesn't take up any space when the column value contains the NULL.
- It takes up more space when column contains NON-NULL value
- It is suitable for only the columns which have storage value NULL in large percentage.
CREATE TABLE employeetable
(
id INT IDENTITY(1,1),
NAME VARCHAR(40),
addres VARCHAR(200),
tempaddres VARCHAR(300) SPARSE
)
From this post you can learn how to create a Sparse columns in Sql Server
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