Question

我的json看起来像

[
  {
"processor": "VISA",
"mapping": {
  "VSID": "161521582"
 }
 },
{
"processor": "MC",
"mapping": {
  "authAcquirerMID": "720000046943001",
  "authAcquirerICA": "3286"
}
},
{
"processor": "MC",
"mapping": {
  "LocationId": "305901891"
}
},
{
"processor": "VISA",
"mapping": {
  "VSID": "72002961"
}
]

我必须为“处理器”：“VISA”获得VSID的价值？我该怎么做？现在我试过了

SELECT JSON_EXTRACT('[{"processor":"VISA","mapping":{"VSID":"161521582"}},
{"processor":"MC","mapping":{"authAcquirerMID":"720000046943001","authAcquirerICA":"3286"}},
{"processor":"MC","mapping":{"LocationId":"305901891"}},
{"processor":"MC","mapping":{"authAcquirerMID":"720000046943001","authAcquirerICA":"003286"}},
{"processor":"VISA","mapping":{"VSID":"72002961"}},
{"processor":"AMEX","mapping":{"targetingId":"1045006731"}}]',
'$.mapping.VSID');

但它没有给出任何结果。任何帮助将不胜感激。

Answer 1

您必须使用通配符运算符才能在所有数组中找到它，例如

'$[*].mapping.VSID'

<强>样品

SELECT JSON_UNQUOTE(JSON_EXTRACT(
'[{"processor":"VISA","mapping":{"VSID":"161521582"}},
{"processor":"MC","mapping":{"authAcquirerMID":"720000046943001","authAcquirerICA":"3286"}},
{"processor":"MC","mapping":{"LocationId":"305901891"}},
{"processor":"MC","mapping":{"authAcquirerMID":"720000046943001","authAcquirerICA":"003286"}},
{"processor":"VISA","mapping":{"VSID":"72002961"}},
{"processor":"AMEX","mapping":{"targetingId":"1045006731"}}]'
,'$[*].mapping.VSID')) as result;

["161521582", "72002961"]

使用json_extrct在嵌套的json中查找元素

1 个答案: