Introduction When building application backends or processing complex data sets in a SQL Server, we frequently need a temporary storage to hold the intermediate query results. For example: Store filtered rows before joining them to another table Hold calculation results inside a stored procedure Break a complex query into smaller readable steps Process a small […]
2026-08-28
3,747 reads
Introduction When designing the tables or writing the stored procedures in SQL Server, we get easily tempted to choose the path of least resistance. When deciding how much space to allocate for a text column in a database table which may contain the description of a product, a product name, or an additional comment/remarks, it […]
2026-08-24
7,890 reads
This article looks at one of the killers of performance at scale, SELECT *.
2026-08-14
2,299 reads
This article looks at replacing a cursor with a window function to improve performance.
2026-08-03
6,846 reads
Learn about implicit conversions, which can dramatically affect the performance of your workload.
2026-07-17
3,551 reads
Introduction We mostly get inclined to use/introduce MongoDB for JSON storing/processing in our database system and Elasticsearch for searching operations in JSON data. However, what we often tend to overlook is that in reality, PostgreSQL can actually act as both NoSQL store and a powerful search engine too. It also comes with ACID guarantees, transactions, […]
2026-03-27
2,146 reads
This article shows a technique for cleaning out older data from PostgreSQL tables using Python to follow a set of rules you create.
2026-01-30
1,017 reads
We have a script that can be used to help tune ind...
2026-01-21
1,740 reads
This article discusses how to work with JSON data in PostgreSQL using Python.
2025-12-12
798 reads
Learn how you can create a logging module in Python that can be used to insert real-time records in a PostgreSQL database and display them on a dashboard.
2025-11-12
2,230 reads
By James Serra
Microsoft shared a broad set of Fabric, Power BI, and SQL updates at FabCon...
By Steve Jones
No, I’m not quitting or retiring. Just going on vacation, but I leave tonight...
Comments posted to this topic are about the item Let's Talk Certifications, which is...
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Comments posted to this topic are about the item 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] GOWhat 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