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select * from SQL

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

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A falling lane rank does not prove a champion nerf

A falling lane rank does not prove a champion nerf

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7 min read
SQL for beginners

SQL for beginners

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5 min read
schemagate is now #1 on the official BIRD Mini-Dev leaderboard

schemagate is now #1 on the official BIRD Mini-Dev leaderboard

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1 min read
How Semantic Errors Propagate Through Multi-Step AI Analytics

How Semantic Errors Propagate Through Multi-Step AI Analytics

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5 min read
One Annotation Cut Our SQL Write Amplification by 90%

One Annotation Cut Our SQL Write Amplification by 90%

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6 min read
What Is a Data Quality Check? Types, Where to Run Them, and Examples

What Is a Data Quality Check? Types, Where to Run Them, and Examples

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5 min read
Preparing Clean Data for a DWH

Preparing Clean Data for a DWH

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21 min read
Pagination That Skips Rows Is an Off-by-One in the Data Model

Pagination That Skips Rows Is an Off-by-One in the Data Model

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3 min read
`SELECT * FROM DUAL` - The Lore of Oracle DB's Weirdest Table

`SELECT * FROM DUAL` - The Lore of Oracle DB's Weirdest Table

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3 min read
Database Indexing – Part 5: Sequential Scan vs. Index Scan vs. Bitmap Index Scan in PostgreSQL

Database Indexing – Part 5: Sequential Scan vs. Index Scan vs. Bitmap Index Scan in PostgreSQL

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6 min read
Why SyteLine Says "Row Has Been Modified by Another User" (and How Optimistic Concurrency Works)

Why SyteLine Says "Row Has Been Modified by Another User" (and How Optimistic Concurrency Works)

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3 min read
Reylo types .sql files by asking your database. I tried to fool it five ways.

Reylo types .sql files by asking your database. I tried to fool it five ways.

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5 min read
Filtering Data in SQL: A Beginner’s Guide to WHERE, AND, LIKE, and Other Operators

Filtering Data in SQL: A Beginner’s Guide to WHERE, AND, LIKE, and Other Operators

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4 min read
SQL WINDOW FUNCTIONS, JOINS, CTES AND SUBQUERRIES.

SQL WINDOW FUNCTIONS, JOINS, CTES AND SUBQUERRIES.

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11 min read
Why Your SQL Query Returns the Wrong Rows (And How WHERE and ORDER BY Fix It)

Why Your SQL Query Returns the Wrong Rows (And How WHERE and ORDER BY Fix It)

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6 min read
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