PostgreSQL SUBSTRING() function - w3resource
Getting Started with PostgreSQL Data Types
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Things you wish you knew about PostgreSQL for building an app
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Postgres Data Types and Their Supported Values - Database Management - Blogs - Quest Community
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Find all string (character) columns in PostgreSQL database - PostgreSQL Data Dictionary Queries
Working with PostgreSQL Data Types in YugabyteDB | Yugabyte
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PostgreSQL STRING_AGG() Function By Practical Examples
PostgreSQL - VARCHAR Data Type - GeeksforGeeks
