sql
![Brian Piercy](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%230A66C2"><path d="M20.447 20.452H16.89v-5.569c0-1.328-.027-3.037-1.852-3.037-1.853 0-2.136 1.445-2.136 2.939v5.667H9.351V9h3.414v1.561h.046c.477-.9 1.637-1.85 3.37-1.85 3.601 0 4.267 2.37 4.267 5.455v6.286zM5.337 7.433a1.982 1.982 0 1 1 0-3.964 1.982 1.982 0 0 1 0 3.964zm1.782 13.019H3.555V9h3.564v11.452zM22.225 0H1.771C.792 0 0 .774 0 1.729v20.542C0 23.227.792 24 1.771 24h20.451C23.2 24 24 23.227 24 22.271V1.729C24 .774 23.2 0 22.222 0h.003z"/></svg>)
Learn how Rails polymorphic associations work under the hood, from database schema to model setup, with clear examples for JavaScript developers new to ActiveRecord.
#60: Break Into Google Spanner Architecture (5 Minutes)
SQL tips and tricks.
While both WHERE and HAVING are used for filtering rows, condition in WHERE clause is applied before grouping of data and condition on HAVING is applied after grouping
Window functions are an advanced feature of SQL that provides powerful tools for detailed data analysis and manipulation without grouping data into single output rows, which is common in aggregate functions.
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A complete GPT2 implementation as a single SQL query in PostgreSQL.
Introduction: Losing or forgetting the MySQL root password can be a stressful situation, but don't...
Developed by ETH ZĂĽrich, the language explores new paradigms for LLM programming.
Seriously, I don't. I'd prefer SQL.
Intro Hello guys! Today I try to write about how to start using psql in Terminal app,...
Recursive queries are a straightforward solution to querying hierarchical trees. However, one loop in the relationship references results in a failing or never ending query when cycle detection is not used.
Simple hacks to try before moving to a different data model altogether
The QUALIFY clause is pure syntactic sugar
Speed up your SQL learning curve.
Data is naturally at the heart of the job of a data scientist or data analyst. You can get your...
SQL (Structured Query Language) is a programming language used to manage and manipulate relational...
Learn SQL commands for filtering, string operations, alias, joining tables, if-else statements, and grouping.
Finally, start practicing SQL with your own database
Databases are the houses of our data and data scientists HAVE TO HAVE A KEY! In this article, I discuss some lesser known concepts of SQL that data scientists do not familiarize themselves with.
Use these simple techniques to make your analysis and data extracts easier
Bringing it back to the basics
A Quick Guide to the IF, CASE, and IFNULL Statements
This 2-page SQL Basics Cheat Sheet will be a great value for beginners as well as for professionals. Download it in PDF or PNG format.
Implementing search in your Rails app can be vexing. Here's a great pattern to use that combines the best parts of ActiveRecord and Postgres.
This is a chronicle of my experiment where I set out to insert 1B rows in SQLite
Reviewing more advanced SQL operations to extract additional data insights from the Irish Weather dataset.
SQL is a programming language used by relational database management systems. It provides numerous functions and methods that operate on the data stored in relational databases. SQL is not just a…
Are you a NoSQL beginner, but want to become a NoSQL Know-It-All? Well, this is the place for you. Get up to speed on NoSQL technologies from a beginner's point of view, with this collection of related progressive posts on the subject. NoSQL? No problem!
One of the most valuable technical skills I use working on a data science team in the retail space is SQL…
To explore SQLite along with Python, which is a user-friendly and no-nonsense language, we are going...
If you’ve been practicing your SQL religiously, like I suggested in Top Skills to Ace Every SQL Interview Question, then you’ve probably…
The ultimate set of SQLite extensions.
Here is why SQLite is a perfect tool for you - whether you are a developer, data analyst, or geek.
The last SQL guide for data analysis you'll need! OK, maybe it’s actually the first, but it’ll give you a solid head start.
Historically speaking, processing large amounts of structured data has been the domain of relational databases. Databases, consisting of tables that can be joined together or aggregated…
Dolt – Git for Data.
From the power of hierarchical queries to that of procedural constructs in SQL
521 votes, 27 comments. 411K subscribers in the computerscience community. The hot spot for CS on reddit.
MongoDB and SQL databases are two polar opposite sides of the backend world. The former deals with chaotic unstructured data, while the…
This post is about installing SQL, explaining SQL and running SQL.
The SQL queries I use as a data scientist and software engineer
I'm re-installing MySQL (5.7.29) for Ubuntu Linux 18.04 LTS. I installed the package using apt & started the service without issue. I was not asked for a root password during the install and am...
How to combine data spread over two CSV files, like separate tables in a normalized relational database.
In this new chapter, we are going to show the following examples in a local SQL Server using SQL Server command line (sqlcmd).
A command-line client for SQL Server with auto-completion and syntax highlighting - dbcli/mssql-cli