https://neon.com/postgresql/tutorial/hstore
PostgreSQL hstore Tutorial
We introduce you to PostgreSQL hstore data type. You will learn know how to perform practical and useful operations on PostgreSQL hstore columns.
postgresqlhstoretutorial
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https://www.postgresql.org/docs/current/hstore.html
PostgreSQL: Documentation: 18: F.17. hstore — hstore key/value datatype
F.17. hstore — hstore key/value datatype # F.17.1. hstore External Representation F.17.2. hstore Operators and Functions F.17.3. Indexes F.17.4. Examples...
18 fpostgresqldocumentationhstorekey