獲取PostgreSQL數據庫中得JSON值

  在PostgreSQL數據庫中有一列為JSON,要獲取JSON中得數據可以用下面sql：

select orderno as OrderNo ,amount as Amount ,ordertime as OrderTime , recordtype as RecordType from jsonb_to_recordset(( --特定方法 select array_to_json(array_agg(data)) --轉換成一個數組 from wallet_details where id = @id )::jsonb) as x(orderno text, amount numeric(16, 6), ordertime text, recordtype varchar(32));

如果你獲取得數據是當前行，但是JSON中也要取出來幾個值可以用下面的方式獲取：

         select pay_params::json->>'Key' as Md5Key , pay_params::json->>'AppId' as Appid , pay_params::json->>'MchId' as Mchid , pay_params::json->>'SubMchId' as Submchid , tenant_id as Tenant_Id from  spm_wallet_settings where id='12'