Development

SQLServerCentral Article

Multi-Select Parameters for Reporting Services

  • Article

Reporting Services is a very handy way to get your SQL Server 2005 data out to end users quickly. It is included with your license and provides a great development environment for reports. New author Adriaan Davel brings us a quick technique for ensuring that multi-select parameters are handled correctly.

1.5 (2)

You rated this post out of 5. Change rating

2007-08-13

11,573 reads

External Article

Transaction Isolation and the New Snapshot Isolation Level

  • Article

Concurrency and transaction isolation are a prickly subject, difficult to explain with any kind of clarity without boring the reader and leaving their poor brain in a complete muddle. Therefore, it is often ignored in the vain hope it won't affect us and we can forget all about it. Well you can't ignore it any more and with SQL Server 2005 there's a whole new isolation level added to the four that already exist.

2007-07-19

2,385 reads

Blogs

T-SQL Tuesday #180: Good enough is perfect

By

How can you achieve good enough without compromising the process/product? In the world of...

How to Convert FileTime to DateTime

By

One of my customers recently wanted to rename each of the SQL audit files...

The pros and cons of self-service BI: What every industry leader should know

By

The post The pros and cons of self-service BI: What every industry leader should...

Read the latest Blogs

Forums

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...

Visit the forum

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

See possible answers