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https://www.postgresql.org/docs/9.3/functions-json.html
13 rows · JSON Support Functions. Function Return Type Description Example Example Result; array_to_json(anyarray [, pretty_bool]) json: Returns the array as JSON. A PostgreSQL multidimensional array becomes a JSON array of arrays. Line feeds will be added between dimension 1 elements if pretty_bool is true.
https://www.vividcortex.com/blog/2015/06/02/json-support-postgres-mysql-mongodb-sql-server/
JSON Support in PostgreSQL. JSON has a longer history of support in PostgreSQL. I have not used it personally, but friends of mine have been talking to me about it at least since the 9.2 release. In this release, JSON was a natively supported datatype, and there were a couple of functions available for querying and manipulating it.
https://www.postgresql.org/docs/9.6/datatype-json.html
When converting textual JSON input into jsonb, the primitive types described by RFC 7159 are effectively mapped onto native PostgreSQL types, as shown in Table 8-23.Therefore, there are some minor additional constraints on what constitutes valid jsonb data that do not apply to the json type, nor to JSON in the abstract, corresponding to limits on what can be represented by the underlying data ...
https://www.postgresql.org/docs/9.2/datatype-json.html
Such data can also be stored as text, but the json data type has the advantage of checking that each stored value is a valid JSON value. There are also related support functions available; see Section 9.15. PostgreSQL allows only one server encoding per database. It is therefore not possible for JSON to conform rigidly to the specification ...
https://www.compose.com/articles/is-postgresql-your-next-json-database/
Mar 03, 2015 · Free 30 Day Trial. TL;DR: Betteridge's law applies unless your JSON is fairly unchanging and needs to be queried a lot. Note: Since this article was published in 2015, PostgreSQL has improved its JSON features with JSONB support. Read more about that in "Could PostgreSQL 9.5 be your next JSON database?".. With the most recent version of PostgreSQL gaining ever more JSON …
https://www.postgresql.org/docs/9.6/functions-json.html
The field/element/path extraction operators that accept integer JSON array subscripts all support negative subscripting from the end of arrays. The standard comparison operators shown in Table 9-1 are available for jsonb, ... Returns the array as a JSON array. A PostgreSQL multidimensional array becomes a JSON array of arrays.
https://www.postgresql.org/docs/current/datatype-json.html
When converting textual JSON input into jsonb, the primitive types described by RFC 7159 are effectively mapped onto native PostgreSQL types, as shown in Table 8.23.Therefore, there are some minor additional constraints on what constitutes valid jsonb data that do not apply to the json type, nor to JSON in the abstract, corresponding to limits on what can be represented by the underlying data ...
https://www.postgresql.org/docs/9.4/functions-json.html
JSON keys are matched to identical column names in the target row type. JSON type coercion for these functions is "best effort" and may not result in desired values for some types. JSON fields that do not appear in the target row type will be omitted from the output, and target columns that do not match any JSON field will simply be NULL.
https://www.postgresql.org/message-id/CAF4Au4w2x-5LTnN_bxky-mq4%3DWOqsGsxSpENCzHRAzSnEd8%2BWQ%40mail.gmail.com
The whole documentation about json support should be reorganized and added, and we plan to do this before release. We need help of community here. Our goal is to provide support of main features of SQL/JSON to release 10, as we discussed at developers meeting in Brussels (Andrew Dunstan has kindly agreed to review the patch).
https://riptutorial.com/postgresql/topic/1034/json-support
JSON - Java Script Object Notation , Postgresql support JSON Data type since 9.2 version. There are some predefined function and operators to access the JSON data. The -> operator returns the key of JSON column. The ->> operator returns the value of JSON Column.
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