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News
PostgreSQL Duplicate Cursor (SQLSTATE 42P03)
1+ day, 49+ min ago (624+ words) Pulse is now NeverBlink AI PostgreSQL raises ERROR: cursor "" already exists with SQLSTATE 42P03 (duplicate_cursor) when a DECLARE statement attempts to open a cursor using a name that is already held by an open cursor in the current transaction. The cursor must…...
One Migration, Start to Finish
14+ hour, 46+ min ago (1886+ words) New to this? Read the eight stages first. That page tells you which stage you are in and what to do about it. This page shows all eight happening on one real-shaped job, so it makes more sense second. By…...
What Data Migration Actually Is
14+ hour, 46+ min ago (856+ words) The work itself is simple to describe. A client is leaving an old system. Their history has to arrive in the new one, complete, connected, and correct. You get the data out, you line up every field with a home…...
Discover 10 practical SQL enhancements in Oracle 23ai that i | KuCoin
1+ day, 5+ hour ago (11+ words) Discover 10 practical SQL enhancements in Oracle 23ai that i kucoin.com...
Demystifying Vector Distance in PostgreSQL
18+ hour, 57+ min ago (288+ words) A look into sliding window comparisons for image analysis. When you need to perform complex similarity comparisons inside a database, you often have to bridge the gap between application-level data structures (like JSON) and low-level math (like vectors). The PostgreSQL…...
Modern IT Helpdesk & Ticketing System Built with PHP Native & MySQL
21+ hour, 33+ min ago (229+ words) Are you looking for a clean, efficient, and modern way to manage IT support requests? Stop dealing with messy manual reports via chat and start using a professional ticketing system! In this video, I’m showcasing "HelpdeskKu"—a powerful, custom-built IT…...
Why 'WHERE x = NULL' Never Works in SQL (And What to Use Instead)
1+ day, 46+ min ago (222+ words) Adapted from the SQL Essentials Companion Guide. You write a query to find every customer with no phone number on file. WHERE phone = NULL looks obviously correct — and it returns zero rows, even though you can see NULL sitting right…...
Normalization vs Standardization in Machine Learning
22+ hour, 29+ min ago (27+ words) When I first started learning machine learning, I often got confused between normalization and standardization. Both are used for feature scaling …...
Split a Name Column? The Migration Contract Catches What Review Misses
1+ day, 4+ hour ago (270+ words) I use MonkeyCode's free model access and free server option for this because the check needs to be cheap enough to run on a hunch. Disclosure: This article was prepared as part of MonkeyCode's product outreach. The harness does not…...
"Power BI Error: The Key Didn't Match Any Rows in the Table"
1+ day, 5+ hour ago (305+ words) The full error reads: Step One: Find Which Values Are Actually Missing Before guessing at a cause, find the specific values that don't match. A quick way: build a calculated column that checks membership directly. LOOKUPVALUE searching for "1001" in a…...