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
3,458 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
7,489 reads
This article looks at one of the killers of performance at scale, SELECT *.
2026-08-14
2,244 reads
This article looks at replacing a cursor with a window function to improve performance.
2026-08-03
6,564 reads
Learn about implicit conversions, which can dramatically affect the performance of your workload.
2026-07-17
3,497 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
2,074 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
979 reads
We have a script that can be used to help tune ind...
2026-01-21
1,682 reads
This article discusses how to work with JSON data in PostgreSQL using Python.
2025-12-12
765 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
2,195 reads
By Steve Jones
My life has some crazy travel stretches for sure. Between speaking, office visits, customer...
In Part 1, we saw how ‘Vamana’ represents vectors as nodes, connects them with...
I’m excited to announce the release of a new open-source project that fully automates...
Comments posted to this topic are about the item Server-Level Table sizes
Comments posted to this topic are about the item Optional Parameter Plan Optimization in...
There is a table tmp_tab:
CREATE TABLE tmp_tab ( id int, val int );
INSERT INTO tmp_tab VALUES (1, 1), (2, NULL), (3, 3), (4, 4), (5, 5);You want to order the rows ids by the following expression:
ISNULL(val, id) + 1Which of the following queries produces the expected ordering and why? (Select all correct) See possible answers