Oracle JSON 字符串处理实例

--从JSONArray中取数据
SELECT jt.*
FROM JSON_TABLE('[
        {
            "device_type_id": 1,"amount": 120,"remarks": ""
        },{
            "device_type_id": 2,"amount": 122,{
            "device_type_id": 3,"amount": 123,"remarks": "22222222221"
        }
    ]','$'COLUMNS(NESTED PATH '$[*]' COLUMNS (device_type_id VARCHAR2(32) PATH '$.device_type_id',amount VARCHAR2(32) PATH '$.amount',remarks VARCHAR2(32) PATH '$.remarks')))
AS jt;

--从JSONObject对象中取数据
SELECT jt.*
FROM JSON_TABLE('{
    "detailed": [
        {
            "device_type_id": 1,"remarks": ""
        }
    ]
}
','$'
COLUMNS
(NESTED PATH '$.detailed[*]' COLUMNS (device_type_id VARCHAR2(32) PATH '$.device_type_id',remarks VARCHAR2(32) PATH '$.remarks')))
AS jt;

SELECT *
  FROM JSON_TABLE('{
                    "device_type_id": "1","amount": "120","remarks": ""
                }
','$' COLUMNS(outer_value_0 NUMBER PATH '$.device_type_id',outer_value_1 NUMBER PATH '$.amount'));

--从三层嵌套的JSONObject对象中取数据
SELECT jt.*
FROM JSON_TABLE('{
    "certificate": "14531209693428a799591c0248bb95c3","rows": [
        {
            "odo_id": "0","odo_no": "ZC-FY-20170217001","stamp": "2017-02-24","order_no": "ZC-DD-20170210001","partners_id": "213","shipping_address": "深圳市福田区科技园南区T2-B栋601","contacts": "李魁","tel": "13510141822","self_mention": "0","detailed": [
                {
                    "device_type_id": "1","amount": "121","remarks": ""
                },{
                    "device_type_id": "2","amount": "122","remarks": ""
                }
            ]
        },{
            "odo_id": "0","odo_no": "ZC-FY-20170217002","detailed": [
                {
                    "device_type_id": "3","amount": "123",{
                    "device_type_id": "4","amount": "124","remarks": ""
                }
            ]
        }
    ]
}
','$'
COLUMNS
  (requestor VARCHAR2(32) PATH '$.certificate',NESTED PATH '$.rows[*]' COLUMNS (odo_no VARCHAR2(32) PATH '$.odo_no',NESTED PATH '$.detailed[*]' COLUMNS (phone_type VARCHAR2(32) PATH '$.device_type_id',phone_num VARCHAR2(20) PATH '$.amount'))))
AS jt;

官方示例连接：

http://docs.oracle.com/database/121/SQLRF/functions092.htm#SQLRF56973

（编辑：李大同）

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