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Posts on tips and tricks, using and learning about SQL for database development and analysis.

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Apache PySpark for Data Engineering

Apache PySpark for Data Engineering

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9 min read
UNPIVOT to key-value pair in Oracle SQL

UNPIVOT to key-value pair in Oracle SQL

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1 min read
Stuck in SQL query

Stuck in SQL query

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2 min read
MySQL Queries: Basics of MySQL

MySQL Queries: Basics of MySQL

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9 min read
Book summary: SQL Antipatterns

Book summary: SQL Antipatterns

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9 min read
Data Tokenization in Snowflake

Data Tokenization in Snowflake

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9 min read
SQL Server Query Optimizer. And how it can hang your business.

SQL Server Query Optimizer. And how it can hang your business.

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8 min read
Expect the unexpected...

Expect the unexpected...

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5 min read
My first CRUD in Python without ORM

My first CRUD in Python without ORM

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4 min read
Read local partition first, then global if not found locally

Read local partition first, then global if not found locally

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7 min read
Django eficiente - select_related

Django eficiente - select_related

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3 min read
how to search jsonb column in Postgresql ( not nested column )

how to search jsonb column in Postgresql ( not nested column )

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1 min read
Is it possible to reference one column as multiple foreign keys? ( PostgreSQL )

Is it possible to reference one column as multiple foreign keys? ( PostgreSQL )

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1 min read
SQL Injection Hacker Challenge

SQL Injection Hacker Challenge

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3 min read
MariaDB Quick-tip #8 - All foreign key constraints

MariaDB Quick-tip #8 - All foreign key constraints

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1 min read
The Principle of Apache Doris SQL Parsing

The Principle of Apache Doris SQL Parsing

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13 min read
Now AWS supports setting up connectivity between your RDS database and EC2 compute instance in 1-click

Now AWS supports setting up connectivity between your RDS database and EC2 compute instance in 1-click

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2 min read
How Would You Make It: Efficient and optimized way of tracking unread message per user

How Would You Make It: Efficient and optimized way of tracking unread message per user

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5 min read
pg_hint_plan with subqueries

pg_hint_plan with subqueries

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4 min read
Cost Explorer Isn't the Answer

Cost Explorer Isn't the Answer

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6 min read
MariaDd Quick-tip #10 - Select table definition

MariaDd Quick-tip #10 - Select table definition

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2 min read
O que é ORM - Mapeamento objeto-relacional

O que é ORM - Mapeamento objeto-relacional

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2 min read
Calculate average delta change in KPIs over a period of time.

Calculate average delta change in KPIs over a period of time.

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2 min read
Data Engineering 101:Introduction to Data Engineering

Data Engineering 101:Introduction to Data Engineering

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3 min read
Online SQL Client for low code data management

Online SQL Client for low code data management

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5 min read
SQL - Foundation of Databases

SQL - Foundation of Databases

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5 min read
ActiveRecord (a Ruby gem): Common Methods

ActiveRecord (a Ruby gem): Common Methods

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4 min read
Parallelizing aggregates in YugabyteDB

Parallelizing aggregates in YugabyteDB

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4 min read
Introduction to data engineering

Introduction to data engineering

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4 min read
New in Entity Framework 7: Bulk Operations with ExecuteDelete and ExecuteUpdate

New in Entity Framework 7: Bulk Operations with ExecuteDelete and ExecuteUpdate

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5 min read
Adding business days to a date using SQL

Adding business days to a date using SQL

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1 min read
Databases: SQL vs NoSQL

Databases: SQL vs NoSQL

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6 min read
How to configure Azure SQL Always Encrypted for Mac users

How to configure Azure SQL Always Encrypted for Mac users

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9 min read
Using Rails Model or SQL query in Ruby On Rails

Using Rails Model or SQL query in Ruby On Rails

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1 min read
Find the Retention Rates – Salesforce SQL Interview Question

Find the Retention Rates – Salesforce SQL Interview Question

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7 min read
Write your first QueryBuilder with PDO and PHP

Write your first QueryBuilder with PDO and PHP

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7 min read
The Mystery of RDS Costs

The Mystery of RDS Costs

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5 min read
DistSQL Applications: Building a Dynamic Distributed Database

DistSQL Applications: Building a Dynamic Distributed Database

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9 min read
Freelancing or Part time job in Data Analysis or Visualisation

Freelancing or Part time job in Data Analysis or Visualisation

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1 min read
MySQL

MySQL

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3 min read
Forget SQL, All My Homies Use LINQ

Forget SQL, All My Homies Use LINQ

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2 min read
MongoDB $weeklyUpdate #82 (August 12, 2022): Community Cafe, Atlas Search, & International MUGs!

MongoDB $weeklyUpdate #82 (August 12, 2022): Community Cafe, Atlas Search, & International MUGs!

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3 min read
3 Ways of Integrating Python With SQL Server Every Data Professional Should Know About

3 Ways of Integrating Python With SQL Server Every Data Professional Should Know About

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4 min read
Finding mean, median, and mode using SQL.

Finding mean, median, and mode using SQL.

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2 min read
Bookmarklet for YugabyteDB table's tablets

Bookmarklet for YugabyteDB table's tablets

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2 min read
SQL DB Backup with PowerShell GUI - Tutorial

SQL DB Backup with PowerShell GUI - Tutorial

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9 min read
Understanding INNER, OUTER, LEFT, and RIGHT Joins in SQL

Understanding INNER, OUTER, LEFT, and RIGHT Joins in SQL

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11 min read
SQL Injections Explained

SQL Injections Explained

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5 min read
Visual Studio Database Project and Always Encrypted

Visual Studio Database Project and Always Encrypted

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4 min read
Insert and query jsonb in rails and postgres

Insert and query jsonb in rails and postgres

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8 min read
Predicting Supermarket Future Sales Using Machine Learning with MindsDB.

Predicting Supermarket Future Sales Using Machine Learning with MindsDB.

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6 min read
Exploratory Data Analysis Using SQL.

Exploratory Data Analysis Using SQL.

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3 min read
Codewars Challenge Day 5: JS, Python + SQL and PHP

Codewars Challenge Day 5: JS, Python + SQL and PHP

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2 min read
Update & delete JSONB in rails and postgres

Update & delete JSONB in rails and postgres

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8 min read
Oracle TO_DATE Function - Complete Guide

Oracle TO_DATE Function - Complete Guide

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3 min read
Joins In SQL Server mesameergaikwad

Joins In SQL Server mesameergaikwad

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1 min read
TypeORM unique indices with multiple fields

TypeORM unique indices with multiple fields

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2 min read
Cybersecurity Programming: SQL Injection Scanner with Python

Cybersecurity Programming: SQL Injection Scanner with Python

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1 min read
Rails: Self Referential Tables

Rails: Self Referential Tables

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3 min read
Data Analyst Roadmap: more than just the tools

Data Analyst Roadmap: more than just the tools

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