查询来自逗号分隔的JSON mysql字段的报告

Question

this is my first question. Apologies if I don't conform with the required rules. I have tried my best and

Problem-- I have a problem with a project am working on. It is medical based. I have these three tables that I need to get reports from DB structure--

diseaseTable which has columns
diseaseID | diseaseName
diseaseID stores an integer i.e 1, 3, 4,..
dieseaseName stores name of disease e.g Hypertension, Malaria, ..e.tc

I also have patientsTable which has these key columns

patientID - which is an autoincrement int
patientName - name of patient
created_at - date and time of registration of the patient

Lastly there is treatment table which contains

treatmentID -autoincrement int
patient - contains the id of the patient which is a foreing key of patientsTable
created_at and updated_at for timestamps
diseaseTreated (which is my column of interest) Stores values in json comma separated fields. 

I have already checked all results from https://stackoverflow.com/search?q=mysql+comma+separated+fields but none seems to solve my problem. I have checked on ways to restructure mysql schema but i would have too many tables to store the diseases diagnised from each patient. In addition one patient might be diagnosed with multiple diseases and a disease can be added any time. I might have almost 100 of them. If ID of Hypertension is 1 and arthritis is 2 a patient with both will have the diseaseTreated field with "1","2" in the treatment table

Solution Expected-- I need to get reports for first time a specific disease has been treated for the first time or second time and more ie revisit for treatment of the same disease (if i wanted to know how many cases of hypertension are for the first time, and how many cases of hypertension are recurrent)

Example - New cases report

Disease | New Cases
Hypertension | 4

Example - Recurrent cases report

Disease | New Cases
Hypertension | 1
Arthritis    | 2

Am using Laravel I have attempted a lot of solutions but this is what i find too close to get what I need: Others I have attempted was looping through different array results i have queried from the database by using joins but I havent posted them because they have yielded nothing important.

$diseaseID
$countedDiseaseCases = DB::select('select * from treatmentTable where JSON_CONTAINS(diseases, \'[\"'.$diseaseID.'\"]\')')

This one would get me the rows with a specific disease and by using php count() on the result I get an int as 3 which is OK but I haven't got to put it as I expect filter and differentiate new and recurrent cases.

Thanks, Any suggestion will be highly appreciated

Answer 1

If the deseaseTreated column is json, couldn't you add an isNew key and when the patient comes in for a second visit, flip that key to false or something similar?

Now when you want to make the report you can get counts on all of them.

//example deseaseTreated value 
{
  "deseases": [
    {
      "deseaseID":"Value", 
      "isNew":Boolean,
      ...
    }, 
    {...}
  ]
}
$records = DB::select('select * from treatment');
$diseases = DB::select('select * from diseases');
foreach ($diseases as $disease) {
    $disease['count_new'] = 0;
}
foreach ($records as $record) {
    $json = json_decode($record['diseaseTreated']);
    foreach ($json['diseases'] as disease_index) {
    if ($disease_index['isNew']) {
        foreach ($diseases as &$d) {
            if ($d['diseaseID'] == $disease_index['diseaseID']) {
                $d['count_new']++;
            }
        }
    }
}