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SQLServerCentral Article

Rules in PostgreSQL

We sometimes need to perform a different/alternative actions during database queries. We need it for data protection or data abstraction. The PostgreSQL rule system allows to define an alternative action on insert, update or delete. A rule generates an extra query. As a result, rule execution impacts the performance of the system. Creating Rules A […]

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2020-12-03

9,216 reads

External Article

Free eBook: SQL Server Backup and Restore

In this free eBook Shawn McGehee offers advice on query tuning, cutting stored procedures, and system process design and implementation for high availability. Discover how to perform backup and restore operations using SQL Server Management Studio (SSMS), basic T-SQL scripts and Redgate's SQL Backup tool.

2020-12-02 (first published: )

80,501 reads

External Article

Have your say in the 2021 State of Database DevOps survey

Have you taken the 2021 State of Database DevOps survey yet? If you or your organization uses databases, we want to hear from you! Complete the survey for advance access to the final research report, and to be entered into a prize draw for a $500 Amazon voucher. Plus, for each submission we receive, we’ll donate $1 to the World Health Organization’s COVID-19 Solidarity Response Fund.

2020-12-01

SQLServerCentral Article

Creating SQL Agent Jobs to Run PowerShell

In one of my articles, Calling Procs from PowerShell with Parameters, there was a question in the discussion about calling PowerShell (PoSh) from SQL Agent Jobs. I haven't done much of that, as most of my PowerShell is interactive scripts to make work easier when managing lots of servers. However, it was an interesting challenge, […]

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2020-11-30

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The Empty Aggregate

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Comments posted to this topic are about the item The Empty Aggregate

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Question of the Day

The Empty Aggregate

I have this table in a SQL Server 2025 database:

CREATE TABLE [dbo].[CustomerOrder]
(
[OrderID] [int] NULL,
[CustomerID] [int] NULL,
[total] [money] NULL
) ON [PRIMARY]
GO
What is returned from this code? (answers are for the sum and then the count)
SELECT SUM(total) AS sum,
       COUNT(total) AS count
FROM dbo.CustomerOrder;



See possible answers