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Beginner About 15 min
Data Types & Casting
Understand PostgreSQL types (text, integer, numeric, date) and convert between them with :: or CAST().
What you'll learn
- Identify PostgreSQL data types: text, integer, numeric, date, boolean
- Cast between types using :: shorthand and CAST() function
- Avoid integer-division bugs by casting to NUMERIC
- Combine text and numbers with safe type casting