Sean Smith


Technical Article

Date Calendar

Code to create a handy date calendar cross-reference table with a ton of pre-populated, slice-and-dice data field variations to aid in complex date parameterization / selection criteria.

4.72 (53)

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2019-04-15 (first published: )

16,553 reads

Technical Article

Index Breakdown

Provides a robust breakdown of all indexes contained within a database allowing for quick analysis and identification of inefficient, redundant, unused, bloated, stale, and / or poorly architected indexes.

4.9 (30)

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2019-04-15 (first published: )

7,103 reads

Technical Article

SQL Server System Report

Overview report for tracking key database performance metrics, general system stats, overall activity, and general server info, including: properties and settings, uptime, drive space, DB size allocation, growth stats, backups, jobs, index fragmentation, missing and unused indexes, and much more.

4.83 (69)

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2019-04-15 (first published: )

15,848 reads

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What's New for the Microsoft Data Platform

By Steve Jones - SSC Editor

Comments posted to this topic are about the item What's New for the Microsoft...

Using Outer Joins

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Using Outer Joins

Closest to ProcDate

By boehnc

Not sure I have this 2nd left join correct. I need to grab the...

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Question of the Day

Using Outer Joins

I have this data in a SQL Server 2019 database:

Customer table
CustomerID CustomerName
1          Steve
2          Andy
3          Brian
4          Allen
5          Devin
6          Sally

OrderHeader table
OrderID CustomerID OrderDate
1       1          2024-02-01
2       1          2024-03-01
3       3          2024-04-01
4       4          2024-05-01
6       4          2024-05-01
7       3          2024-06-07
8       2          2024-04-07
I want a list of all customers and their order counts for a period of time, including zero orders. If I run this query, how many rows are returned?
SELECT 
  c.CustomerName, COUNT(oh.OrderID)
 FROM dbo.Customer AS c
LEFT JOIN dbo.OrderHeader AS oh ON oh.CustomerID = c.CustomerID
WHERE oh.Orderdate > '2024/04/01'
GROUP BY c.CustomerName

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