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

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SQL Injection with SQLmap on Kali: From Login Form to Database

SQL Injection with SQLmap on Kali: From Login Form to Database

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3 min read
Julian Date Conversion in Code: YYDDD, CYYDDD, JD and MJD in Python, JavaScript, SQL and Excel

Julian Date Conversion in Code: YYDDD, CYYDDD, JD and MJD in Python, JavaScript, SQL and Excel

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4 min read
SQL Interview Rounds: What to Expect and How to Prepare

SQL Interview Rounds: What to Expect and How to Prepare

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1 min read
Same SQL, Fast for One Value, Slow for Another

Same SQL, Fast for One Value, Slow for Another

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12 min read
Views vs Materialized Views In PostgreSQL

Views vs Materialized Views In PostgreSQL

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3 min read
Your database reads pages, not rows

Your database reads pages, not rows

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3 min read
Postgres 19 Turns JIT Off by Default. Find the Queries That Were Paying for It

Postgres 19 Turns JIT Off by Default. Find the Queries That Were Paying for It

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8 min read
Your Dashboard Is Lying: The Spend Fan-Out Trap and the Lead I Lost When the API Went Down

Your Dashboard Is Lying: The Spend Fan-Out Trap and the Lead I Lost When the API Went Down

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3 min read
WINDOW FUNCTIONS,JOINS,SUBQUERIES AND CTEs

WINDOW FUNCTIONS,JOINS,SUBQUERIES AND CTEs

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5 min read
How to Fix Epicor Kinetic BAQ Timeouts: PartTran, TranGLC & Query Tuning

How to Fix Epicor Kinetic BAQ Timeouts: PartTran, TranGLC & Query Tuning

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5 min read
SQL Server INT to BIGINT Primary Key: Four Ways to Change It and What Each One Costs

SQL Server INT to BIGINT Primary Key: Four Ways to Change It and What Each One Costs

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11 min read
Modelling Surgical Instrument Sets as Data: A Dilator Set Example

Modelling Surgical Instrument Sets as Data: A Dilator Set Example

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2 min read
Mastering SQL: Window Functions, Joins, Common Table Expressions (CTEs), and Subqueries Using a Hospital Database

Mastering SQL: Window Functions, Joins, Common Table Expressions (CTEs), and Subqueries Using a Hospital Database

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14 min read
JOINS ,CTES and Subqueries in SQL

JOINS ,CTES and Subqueries in SQL

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12 min read
Database Optimization: Beyond the Basics

Database Optimization: Beyond the Basics

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4 min read
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