Edwin Sanchez, Author at {coding}Sight

How to Get SQL Percentage Calculation as Easy as Pie

Edwin Sanchez — Thu, 14 Mar 2024 15:54:32 +0000

Percentage calculation in SQL can be a bit like traversing an unfamiliar labyrinth. If you’re a beginner, it’s easy to get lost in a maze of numbers and functions. You may stumble over pitfalls that can lead to incorrect results. But fear not because we’re about to make SQL percentage calculations as easy as pie! …

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MySQL Delete Column: The 2024 Ultimate Easy Guide

Edwin Sanchez — Wed, 13 Mar 2024 15:44:40 +0000

The MySQL delete column might sound pretty straightforward. You simply run the DROP COLUMN command, and poof! It’s gone. However, there’s a catch. The impact of this seemingly simple action can be more far-reaching than you might have anticipated. Deleting a column with dependencies can lead to a cascade of issues. But fear not! It’s …

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Oracle Performance Tuning: Tips, Tricks and Hidden Secrets

Edwin Sanchez — Wed, 20 Dec 2023 08:01:51 +0000

Ever wondered why Oracle Performance Tuning is so thrilling for budding Oracle developers and DBAs? The answer lies in the art of transforming a sluggish database into a finely-tuned powerhouse. At first, it might seem as complex as decoding a mad scientist’s experiment. But fear not! This article is your guide, turning the daunting into …

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SQL Multiple Joins – How to Join Tables the Easy-Breezy Way

Edwin Sanchez — Wed, 11 Oct 2023 15:34:13 +0000

Have you ever found yourself tangled in the web of SQL multiple joins? Don’t sweat it – we’ve all been there. Think of it like a puzzle, with tables as puzzle pieces. You’re just connecting them to see the bigger picture. Now, I know, the code might look like a maze, and it’s easy to …

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MySQL Foreign Key – How to Relate Tables Without Freaking Out

Edwin Sanchez — Wed, 04 Oct 2023 15:18:46 +0000

Have you ever felt like a puzzle piece that won’t fit, especially about MySQL foreign keys? Trust me, you’re not alone on this adventurous data journey. Imagine that you’re going to create your first MySQL database. It would be like your first trip to a dream place. Without hesitation, you add your first foreign key. …

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The MySQL ADD COLUMN Easy Guide: How to Make New Table Columns Without the Oops

Edwin Sanchez — Mon, 21 Aug 2023 09:28:21 +0000

Have you made a rookie mistake when you add or insert a new column in your MySQL table? “But what’s the big deal? Adding or inserting a new column is totally painless.”, you may say. That’s true. Adding a column is as easy as adding a topping to a pizza or ice cream. But if …

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The SELECT INTO Temp Table Easy Guide: How to Manage Temporary Data Without Dismay

Edwin Sanchez — Wed, 16 Aug 2023 16:07:54 +0000

Data processing may involve several steps. And it can be fun! But the fun ends when you access some joined tables again and again. So, when you look at your SQL code, it’s yucky and ugly because of repeated lines. But what if you can store the results of those joined tables in temporary storage? …

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SQL Server PARTITION BY: A Beginner’s Lifesaver on How to Partition Datasets

Edwin Sanchez — Fri, 21 Jul 2023 16:27:34 +0000

Is SQL Server PARTITION BY clause giving you a brain freeze? Beginners feel like entering a complex maze at first glance of code complexity. But you want to tackle this like a piece of cake, without the confusion. And without hair-pulling. So, this article is for you. We’ll make it plain and simple. The complication …

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T-SQL CHAR vs. VARCHAR: How to Store Text and Slash Query Time

Edwin Sanchez — Fri, 07 Jul 2023 13:06:46 +0000

Is it a big deal to choose between CHAR and VARCHAR? What if your choice between CHAR vs. VARCHAR results in a nightmare of query lags? When I was a newbie in SQL Server, it was not a big deal to me. Both store strings of characters so I thought it was just the same. …

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SQL Server UPDATE from SELECT: How to Bulletproof Your Updates Like a Pro

Edwin Sanchez — Wed, 14 Jun 2023 16:02:39 +0000

SQL Server UPDATE from SELECT is not your usual cup of tea on T-SQL. So, it’s time to level up your UPDATE skills. But with this, you have a new foe: code complexity. Crushing code complexity is a source of many headaches. Reading rows using a complex query is one thing. Updating rows is another. …

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