我想在 MySQL 中使用 JSON 字段的键检索 SUM

Question

我想使用 MySQL json_extract 和 json_object 或任何其他从 JSON 类型数据字段中获取 vehicle_rent、material_amount、other_amount、labour_amount、pa_amount 和 ta_amount 的总和jsonMySQL的相关方法。

{
    "task_vehicle": [
        {
            "vehicle_note": "Anonymous Proof",
            "vehicle_rent": "2000"
        }
    ],
    "task_material": [
        {
            "material_note": "Anonymous Proof",
            "material_amount": 200
        }
    ],
    "task_regular_amount": {
        "other": {
            "other_amount": "250"
        },
        "labour": {
            "labour_amount": "250"
        }
    },
    "task_purchase_breakdown": [
        {
            "pa_amount": "200"
        },
        {
            "pa_amount": "200"
        }
    ],
    "task_transport_breakdown": [
        {
            "ta_amount": "250",
            "transport_type": "Bus",
        }
    ]
}

如果 json 数据如下所示，我可以提取和求和这些值-

{
"vehicle_rent": "2000",
"material_amount": "200",
"other_amount": "250".
"ta_amount": "250"
}

Answer 1

不能影响订单。

SELECT JSON_OBJECT('vehicle_rent',JSON_EXTRACT('{
    "task_vehicle": [
        {
            "vehicle_note": "Anonymous Proof",
            "vehicle_rent": "2000"
        }
    ],
    "task_material": [
        {
            "material_note": "Anonymous Proof",
            "material_amount": 200
        }
    ],
    "task_regular_amount": {
        "other": {
            "other_amount": "250"
        },
        "labour": {
            "labour_amount": "250"
        }
    },
    "task_purchase_breakdown": [
        {
            "pa_amount": "200"
        },
        {
            "pa_amount": "200"
        }
    ],
    "task_transport_breakdown": [
        {
            "ta_amount": "250",
            "transport_type": "Bus"
        }
    ]
}'
, '$.task_vehicle[0].vehicle_rent'),'material_amount',
JSON_EXTRACT('{
    "task_vehicle": [
        {
            "vehicle_note": "Anonymous Proof",
            "vehicle_rent": "2000"
        }
    ],
    "task_material": [
        {
            "material_note": "Anonymous Proof",
            "material_amount": 200
        }
    ],
    "task_regular_amount": {
        "other": {
            "other_amount": "250"
        },
        "labour": {
            "labour_amount": "250"
        }
    },
    "task_purchase_breakdown": [
        {
            "pa_amount": "200"
        },
        {
            "pa_amount": "200"
        }
    ],
    "task_transport_breakdown": [
        {
            "ta_amount": "250",
            "transport_type": "Bus"
        }
    ]
}'
, '$.task_material[0].material_amount')
,'other_amount',
JSON_EXTRACT('{
    "task_vehicle": [
        {
            "vehicle_note": "Anonymous Proof",
            "vehicle_rent": "2000"
        }
    ],
    "task_material": [
        {
            "material_note": "Anonymous Proof",
            "material_amount": 200
        }
    ],
    "task_regular_amount": {
        "other": {
            "other_amount": "250"
        },
        "labour": {
            "labour_amount": "250"
        }
    },
    "task_purchase_breakdown": [
        {
            "pa_amount": "200"
        },
        {
            "pa_amount": "200"
        }
    ],
    "task_transport_breakdown": [
        {
            "ta_amount": "250",
            "transport_type": "Bus"
        }
    ]
}'
, '$.task_regular_amount.other.other_amount'),'ta_amount',
JSON_EXTRACT('{
    "task_vehicle": [
        {
            "vehicle_note": "Anonymous Proof",
            "vehicle_rent": "2000"
        }
    ],
    "task_material": [
        {
            "material_note": "Anonymous Proof",
            "material_amount": 200
        }
    ],
    "task_regular_amount": {
        "other": {
            "other_amount": "250"
        },
        "labour": {
            "labour_amount": "250"
        }
    },
    "task_purchase_breakdown": [
        {
            "pa_amount": "200"
        },
        {
            "pa_amount": "200"
        }
    ],
    "task_transport_breakdown": [
        {
            "ta_amount": "250",
            "transport_type": "Bus"
        }
    ]
}'
, '$.task_transport_breakdown[0].ta_amount')) as result

|结果 | | :------------------------------------------------ ------------------------------------------ | | {“ta_amount”：“250”，“other_amount”：“250”，“vehicle_rent”：“2000”，“material_amount”：200} |

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