BI SQL # 254 : SQL Server DBA Scripts : Estimating Rows per Page

Hi Folks,

In this article we are going to cover How to find Estimating Rows per Page.

In this post we are going to discuss following points:

• Problem Statement of SQL Script:
• Description of SQL Script:
• SQL Script Output Column
• SQL Script Code
• SQL Script Output Screenshot
• User Level to execute

Problem Statement of SQL Script:

How to estimate Rows per Page?

Description of SQL Script:

This script will estimate Rows per Page.

SQL Script Output Column

SQL Script Code

SELECT object_name(i.object_id) AS 'tableName'
    ,i.NAME AS 'indexName'
    ,i.type_desc
    ,Max(p.partition_number) AS 'partitions'
    ,Sum(p.rows) AS 'rows'
    ,Sum(au.data_pages) AS 'dataPages'
    ,Sum(p.rows) / Sum(au.data_pages) AS 'rowsPerPage'
FROM sys.indexes AS i
JOIN sys.partitions AS p ON i.object_id = p.object_id
    AND i.index_id = p.index_id
JOIN sys.allocation_units AS au ON p.hobt_id = au.container_id
WHERE object_name(i.object_id) NOT LIKE 'sys%'
    AND au.type_desc = 'IN_ROW_DATA'
GROUP BY object_name(i.object_id)
    ,i.NAME
    ,i.type_desc
HAVING Sum(au.data_pages) > 100
ORDER BY rowsPerPage;

SQL Script Output Screenshot

User Level to execute

300

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