编程语言：nodejs+express
sql语句如下：
var sql_02 = `select u.HospitalId as hospitalId,h.HospitalName as hospitalName,u.DeptId as deptId,hd.DeptName as deptName ,UserId as doctorId,UserName as doctorName
from [user] u
left join hospital h on h.HospitalId=u.HospitalId
left join hospital_department hd on hd.DeptId=u.DeptId
where u.HospitalId=?`
查询结果将返回一个JSON数据；
{
"success": true,
"data": [{
"hospitalId": "1008",
"hospitalName": "**县人民医院",
"deptId": "1008053",
"deptName": "内儿科",
"doctorId": "10080001",
"doctorName": "*清华"
}, {
"hospitalId": "1008",
"hospitalName": "**县人民医院",
"deptId": "1008050",
"deptName": "肿瘤血液内科",
"doctorId": "10080002",
"doctorName": "*浩"
}, {
"hospitalId": "1008",
"hospitalName": "**县人民医院",
"deptId": "1008055",
"deptName": "肝胆胃肠三腺外科",
"doctorId": "10080003",
"doctorName": "**勇"
}, {
"hospitalId": "1008",
"hospitalName": "**县人民医院",
"deptId": "1008027",
"deptName": "急诊科",
"doctorId": "10080004",
"doctorName": "**彬"
}, {
"hospitalId": "1008",
"hospitalName": "**县人民医院",
"deptId": "1008058",
"deptName": "呼吸内科",
"doctorId": "10080005",
"doctorName": "*伊潇"
}, {
"hospitalId": "1008",
"hospitalName": "**县人民医院",
"deptId": "1008069",
"deptName": "疼痛科",
"doctorId": "10080006",
"doctorName": "**孔"
}, {
"hospitalId": "1008",
"hospitalName": "**县人民医院",
"deptId": "1008069",
"deptName": "疼痛科",
"doctorId": "10080007",
"doctorName": "米*杰"
}, {
"hospitalId": "1008",
"hospitalName": "**县人民医院",
"deptId": "1008001",
"deptName": "信息科",
"doctorId": "10089999",
"doctorName": "管理员"
}],
"message": "数据获取成功"
}
现在需要转换为如下格式：
[{
"hosptialId": "10001",
"hosptialName": "**医院",
"deptItem": [{
"deptId": "10001001",
"deptName": "心内科",
"DoctorItem": [{
"doctorId": "10001001001",
"doctorName": "张教授"
},
{
"doctorId": "10001001002",
"doctorName": "李教授"
},
{
"doctorId": "10001001001",
"doctorName": "张教授"
}
]
},
{
"deptId": "10001002",
"deptName": "消化科",
"DoctorItem": [{
"doctorId": "10001002001",
"doctorName": "王教授"
},
{
"doctorId": "10001002002",
"doctorName": "陈教授"
},
{
"doctorId": "10001002001",
"doctorName": "高教授"
}
]
}
]
}, {
"hosptialId": "10002",
"hosptialName": "**附属医院",
"deptItem": [{
"deptId": "10002001",
"deptName": "心胸外科",
"DoctorItem": [{
"doctorId": "10002001001",
"doctorName": "范教授"
},
{
"doctorId": "10002001002",
"doctorName": "孙教授"
},
{
"doctorId": "10002001001",
"doctorName": "高教授"
}
]
},
{
"deptId": "10002002",
"deptName": "肿瘤科",
"DoctorItem": [{
"doctorId": "10002002001",
"doctorName": "王教授"
},
{
"doctorId": "10002002002",
"doctorName": "雷教授"
},
{
"doctorId": "10002002003",
"doctorName": "杨教授"
}
]
}
]
}]
也就是说，目标JSON格式是医院-科室-医生。
求JSON数据遍历分组方法。
