Postgresql json unnest
Operator, Right Operand Type, Description, Example. ->, int, Get JSON array element, '[1,2,3]'::json->2. ->, text, Get JSON object field, '"a":1,"b":2}'::json->'b'. ,2017年4月24日 — but then I can't figure out how to do either convert the JSON array to a PostgreSQL array so I can perform something like unnest(ARRAY['a','1']).
| 相關軟體 PostgreSQL (64-bit) 資訊 | |
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 Postgresql json unnest 相關參考資料
Cannot unnest json in postgres - Stack Overflow
2019年4月6日 — cross join json_array_elements with the table select j.* from json_example cross join json_array_elements(value) as j. DEMO. https://stackoverflow.com Documentation: 9.3: JSON Functions and ... - PostgreSQL
Operator, Right Operand Type, Description, Example. ->, int, Get JSON array element, '[1,2,3]'::json->2. ->, text, Get JSON object field, '"a":1,"b":2}'::j... https://www.postgresql.org How to convert JSON Array of Arrays to columns and rows ...
2017年4月24日 — but then I can't figure out how to do either convert the JSON array to a PostgreSQL array so I can perform something like unnest(ARRAY['a','1']). https://stackoverflow.com How to turn a json array into rows in postgres - Stack Overflow
2018年4月10日 — unnest() is for PostgreSQL's array types. Instead one of the following function can be used: json_array_elements(json) (9.3+) jsonb_array_elements(jsonb) (9.4+) https://stackoverflow.com How to turn a json array into rows in postgresql - Stack Overflow
2019年9月27日 — json_to_record and json_to_recordset from the JSON processing functions do exactly this. In your case: SELECT cols.* FROM ... https://stackoverflow.com How to turn JSON array into Postgres array? - Database ...
To unnest the JSON array. Then use array_agg() or an ARRAY constructor to build a Postgres array from it. Or string_agg() to build a text string. Aggregate ... https://dba.stackexchange.com How to unnest and display elements of a JSON array ...
According to the documentation, the #> operator comes in useful: -- name and genre of people (1 row per person) select json_array_elements( t.test#>'clients, ... https://dba.stackexchange.com How to unnest and GROUP BY elements of a JSON array ...
2018年6月1日 — How to turn JSON array into Postgres array? So: SELECT p.name, count(*) AS c FROM band b, json_array_elements_text(b.people) p(name) ... https://dba.stackexchange.com Unnesting a list of JSON objects in PostgreSQL - Stack Overflow
2018年6月26日 — if you know beforehand what fields you want to extract, cast the text to json / jsonb & use json_to_recordset / jsonb_to_recordset . Note that this ... https://stackoverflow.com |