获取PostgreSQL数据库中得JSON值

  在PostgreSQL数据库中有一列为JSON,要获取JSON中得数据可以用下面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)) --转换成一个数组 from wallet_details where id = @id )::jsonb) as x(orderno text, amount numeric(16, 6), ordertime text, recordtype varchar(32));

如果你获取得数据是当前行，但是JSON中也要取出来几个值可以用下面的方式获取：

         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'