SQL Snippets

Code Tippen

SQL Snippets

SQL Tippubung.

Anfanger · 10 ZeilenINNER JOIN

Join customers and orders, project a flat report.

Mittel · 10 ZeilenGROUP BY with HAVING

Aggregate customer spend and filter high-value accounts.

Fortgeschritten · 10 ZeilenWindow Function

Rank orders by total within each customer.

Fortgeschritten · 11 ZeilenRecursive CTE

Walk a category tree from the root down.

Mittel · 7 ZeilenUPSERT

Insert or update on conflict (PostgreSQL syntax).

Mittel · 10 ZeilenComposite Index

Accelerate a common query with a multi-column index.