以文本形式获取对象值
最近更新时间: 2025-10-11 18:10:00
postgres=# select f_json ->>'col2' as col2 ,f_json ->> 'col3' as col3 from t_json;
col2 | col3
-------+------
TDSQL PG |
TDSQL PG | pgxz
(2 rows)
postgres=# select f_json ->>'col2' as col2 ,f_json ->> 'col3' as col3 from t_json where f_json ->> 'col3' is not null;
col2 | col3
-------+------
TDSQL PG | pgxz
(1 row)