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

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SQL Subqueries: Simplified

SQL Subqueries: Simplified

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2 min read
When are PostgreSQL prepared statements fully prepared for execution?

When are PostgreSQL prepared statements fully prepared for execution?

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5 min read
Understanding the basics and advanced concepts of RDBMS and SQL for data science and analysis

Understanding the basics and advanced concepts of RDBMS and SQL for data science and analysis

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11 min read
Analysing Github Stars - Extracting and analyzing data from Github using Apache NiFi®, Apache Kafka® and Apache Druid®

Analysing Github Stars - Extracting and analyzing data from Github using Apache NiFi®, Apache Kafka® and Apache Druid®

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9 min read
MySQL: How to create One-to-Many Relationship

MySQL: How to create One-to-Many Relationship

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6 min read
The best SQL function you never heard of

The best SQL function you never heard of

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5 min read
🚀Batched Nested Loop to reduce read requests to the distributed storage

🚀Batched Nested Loop to reduce read requests to the distributed storage

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8 min read
Scalable Sequence for PostgreSQL

Scalable Sequence for PostgreSQL

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6 min read
Limpando dados antigos de um banco de dados multi-tenant

Limpando dados antigos de um banco de dados multi-tenant

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4 min read
The Benefits of Using a Graph Database Instead of SQL

The Benefits of Using a Graph Database Instead of SQL

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10 min read
One-page Database cheat sheet

One-page Database cheat sheet

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1 min read
Database 101: Data Consistency for Beginners

Database 101: Data Consistency for Beginners

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6 min read
SQL Commands Cheat Sheet

SQL Commands Cheat Sheet

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11 min read
Parallel export to CSV in YugabyteDB thanks to yb_hash_code() and PostgreSQL-compatibility

Parallel export to CSV in YugabyteDB thanks to yb_hash_code() and PostgreSQL-compatibility

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3 min read
Data Analytics at Potloc I: Making data integrity your priority with Elementary & Meltano

Data Analytics at Potloc I: Making data integrity your priority with Elementary & Meltano

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7 min read
Get the count of affected rows with ease: The power of the RETURNING clause in Postgres

Get the count of affected rows with ease: The power of the RETURNING clause in Postgres

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2 min read
SQL Cheet Sheat

SQL Cheet Sheat

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2 min read
SQL doesn't need the "Single Table Design" but Composite Primary Keys

SQL doesn't need the "Single Table Design" but Composite Primary Keys

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13 min read
What is database transaction?

What is database transaction?

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2 min read
Why a SQL Statement Often Consists of Hundreds of Lines, Measured by KBs?

Why a SQL Statement Often Consists of Hundreds of Lines, Measured by KBs?

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13 min read
IvorySQL - I've tested some Oracle-PostgreSQL compatibility of version 2.1

IvorySQL - I've tested some Oracle-PostgreSQL compatibility of version 2.1

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10 min read
Mapping your AWS attack surface

Mapping your AWS attack surface

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6 min read
Boost Your Query Performance with Function-Based Indexes in PostgreSQL

Boost Your Query Performance with Function-Based Indexes in PostgreSQL

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1 min read
Data Rollup in YugabyteDB🚀 and PostgreSQL🐘

Data Rollup in YugabyteDB🚀 and PostgreSQL🐘

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4 min read
INSERT ON CONFLICT returning old values

INSERT ON CONFLICT returning old values

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3 min read
Why do SQL Server views need refreshing?

Why do SQL Server views need refreshing?

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2 min read
Create user with read only permission in PostgreSQL

Create user with read only permission in PostgreSQL

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1 min read
Monitoring SQL Server Agent Jobs with Spring Batch

Monitoring SQL Server Agent Jobs with Spring Batch

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4 min read
Mermerd - Generate your ERD blazingly fast

Mermerd - Generate your ERD blazingly fast

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2 min read
The basic of the advanced SQL queries: Tuning

The basic of the advanced SQL queries: Tuning

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4 min read
SQL 基礎 Part 03 -- docker-compose で立てたコンテナで立ち上げ時に DB と全権力ユーザーを作成して、外部からログインする

SQL 基礎 Part 03 -- docker-compose で立てたコンテナで立ち上げ時に DB と全権力ユーザーを作成して、外部からログインする

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2 min read
Using NebulaGraph Importer to Import Data into NebulaGraph Database

Using NebulaGraph Importer to Import Data into NebulaGraph Database

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5 min read
Beyond ORM and Stored Procedures

Beyond ORM and Stored Procedures

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12 min read
SQL cheat sheet/crash course

SQL cheat sheet/crash course

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4 min read
Partial Index as an approximate Count(*) Materialized View

Partial Index as an approximate Count(*) Materialized View

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3 min read
Playing Window Function in Postgres

Playing Window Function in Postgres

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4 min read
Open-source SPL that can execute SQL without RDB

Open-source SPL that can execute SQL without RDB

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11 min read
SQL🔥Get Expertise in SQL with These Top Free Courses💯🏆

SQL🔥Get Expertise in SQL with These Top Free Courses💯🏆

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1 min read
How SQL engine implement the isolation levels in MySQL

How SQL engine implement the isolation levels in MySQL

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3 min read
To SQL or to NoSQL (with a simple NoSQL Example)

To SQL or to NoSQL (with a simple NoSQL Example)

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11 min read
Data Segregation with PostgreSQL

Data Segregation with PostgreSQL

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9 min read
TOP 5 WEBSITES TO LEARN SQL

TOP 5 WEBSITES TO LEARN SQL

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3 min read
SQL extensions for time series data in QuestDB part II

SQL extensions for time series data in QuestDB part II

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8 min read
Create an SQL Report API in 5 minutes

Create an SQL Report API in 5 minutes

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2 min read
How to check if the PostgreSQL tables of the same structure have the identical data using aggregated hash and md5?

How to check if the PostgreSQL tables of the same structure have the identical data using aggregated hash and md5?

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2 min read
How sql engine handle join internally - part 2

How sql engine handle join internally - part 2

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3 min read
Building Streaming Applications with Cloudera SQL StreamBuilder and Apache Pulsar

Building Streaming Applications with Cloudera SQL StreamBuilder and Apache Pulsar

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5 min read
A very short demo on updates in YugabyteDB

A very short demo on updates in YugabyteDB

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3 min read
Goodbye, Stored Procedures - the Love/Hate Thing

Goodbye, Stored Procedures - the Love/Hate Thing

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12 min read
'; SQL_Injection ( ) ;--

'; SQL_Injection ( ) ;--

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7 min read
Weather Observation Station 17 Hackerrank Solution

Weather Observation Station 17 Hackerrank Solution

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1 min read
Working with Azure SQL Triggers in Azure Functions

Working with Azure SQL Triggers in Azure Functions

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7 min read
Advent of Code - Day 4

Advent of Code - Day 4

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3 min read
Why Are SQL Databases Outdated for the Real-Time Recommendation Engines

Why Are SQL Databases Outdated for the Real-Time Recommendation Engines

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9 min read
Advent of Code - Day 3

Advent of Code - Day 3

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6 min read
An Introduction to SQLite with Python

An Introduction to SQLite with Python

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5 min read
Types of SQL Joins

Types of SQL Joins

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4 min read
How to work with JSON data on SQL Server

How to work with JSON data on SQL Server

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4 min read
Handling Duplicate Records

Handling Duplicate Records

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3 min read
SQL 基礎 Part 01 -- PostgreSQL サーバーを docker-compose で起動する

SQL 基礎 Part 01 -- PostgreSQL サーバーを docker-compose で起動する

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2 min read
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