postgresql jsonb to string
將字串JSON 輸入轉換為jsonb 時，RFC 7159 描述的原始型別將會有效地對應到內建 ... Primitive values can be numbers, quoted strings, true, false, or null. ,2017年9月26日 — No need for a cast, simply use the ->> operator which returns the value as text. SELECT DISTINCT value ->> 'Tag' AS tagname FROM ... ,text, Does the string exist as a top-level key within the JSON value? '"a":1, "b":2}'::jsonb ? 'b' ?| text[], Do any of these array strings exist as top-level keys? '"a":1 ... ,text, Does the string exist as a top-level key within the JSON value? '"a":1, "b":2}'::jsonb ? 'b' ?| text[], Do any of these array strings exist as top-level keys? '"a":1 ... ,Note: The hstore extension has a cast from hstore to json, so that converted hstore values are represented as JSON objects, not as string values. See also ... ,Does the key/element string exist within the JSON value? '"a":1, "b":2}'::jsonb ? 'b' ?| text[], Do ... ,text, Does the string exist as a top-level key within the JSON value? '"a":1, "b":2}'::jsonb ? 'b' ?| text[], Do any of these array strings exist as top-level keys? '"a":1 ... ,text, Does the string exist as a top-level key within the JSON value? '"a":1, "b":2}'::jsonb ? 'b' ?| text[], Do any of these array strings exist as top-level keys? '"a":1 ... ,2015年8月1日 — The trick is to convert the JSON into an array of one JSON element, then extract that element using ->> . select length( array_to_json(array[to_json('Some "text"'::TEXT)])->>0 ); ,I then figured out that if I manually convert to text using the :: syntax, everything works as expected, too - although we are now comparing strings again. select data- ...
| 相關軟體 PostgreSQL (64-bit) 資訊 | |
|---|---|
 postgresql jsonb to string 相關參考資料
8.14. JSON 型別- PostgreSQL 正體中文使用手冊
將字串JSON 輸入轉換為jsonb 時，RFC 7159 描述的原始型別將會有效地對應到內建 ... Primitive values can be numbers, quoted strings, true, false, or null. https://docs.postgresql.tw cast a jsonb value to varchar in postgresql - Stack Overflow
2017年9月26日 — No need for a cast, simply use the ->> operator which returns the value as text. SELECT DISTINCT value ->> 'Tag' AS tagname FROM ... https://stackoverflow.com Documentation: 10: 9.15. JSON Functions and ... - PostgreSQL
text, Does the string exist as a top-level key within the JSON value? '"a":1, "b":2}'::jsonb ? 'b' ?| text[], Do any of these array strings exist as top-level keys?... https://www.postgresql.org Documentation: 12: 9.15. JSON Functions and ... - PostgreSQL
text, Does the string exist as a top-level key within the JSON value? '"a":1, "b":2}'::jsonb ? 'b' ?| text[], Do any of these array strings exist as top-level keys?... https://www.postgresql.org Documentation: 9.3: JSON Functions and ... - PostgreSQL
Note: The hstore extension has a cast from hstore to json, so that converted hstore values are represented as JSON objects, not as string values. See also ... https://www.postgresql.org Documentation: 9.4: JSON Functions and ... - PostgreSQL
Does the key/element string exist within the JSON value? '"a":1, "b":2}'::jsonb ? 'b' ?| text[], Do ... https://www.postgresql.org Documentation: 9.5: JSON Functions and ... - PostgreSQL
text, Does the string exist as a top-level key within the JSON value? '"a":1, "b":2}'::jsonb ? 'b' ?| text[], Do any of these array strings exist as top-level keys?... https://www.postgresql.org Documentation: 9.6: JSON Functions and ... - PostgreSQL
text, Does the string exist as a top-level key within the JSON value? '"a":1, "b":2}'::jsonb ? 'b' ?| text[], Do any of these array strings exist as top-level keys?... https://www.postgresql.org Postgres: How to convert a json string to text? - Stack Overflow
2015年8月1日 — The trick is to convert the JSON into an array of one JSON element, then extract that element using ->> . select length( array_to_json(array[to_json('Some "text"':... https://stackoverflow.com Querying JSONB in PostgreSQL - Database Administrators ...
I then figured out that if I manually convert to text using the :: syntax, everything works as expected, too - although we are now comparing strings again. select data- ... https://dba.stackexchange.com |