a detailed website about json sql query; official website: here, chinese version: here Json query: ->element_name or index; and can be sequential; select column::json->'element' as readdata from schema.tableName; select column1::json->'element1'…
https://www.postgresql.org/docs/9.6/static/functions-json.html PostgreSQL 9.6.1 Documentation Prev Up Chapter 9. Functions and Operators Next 9.15. JSON Functions and Operators Table 9-42 shows the operators that are available for use with the two JS…