I need to modify GetSelectStatement to generate select statment below :

Code:
select FooterTable.ItemCode,FooterTable.Quantity,FooterTable.UniPrice from

MasterTable inner join FooterTable on MasterTable.Serial=FooterTable.Serial,MasterTable.BranchCode=FooterTable.BranchCode,MasterTable.Year=FooterTable.Year

where MasterTable.Serial=10 AND MasterTable.Year=2019 AND MasterTable.BranchCode=1
How to modify csharp function GetSelectStatement to generate inner join select statement as :

Code:
public string GetSelectStatement(string JsonDataForSelect)
        {
            var root = (JObject)JsonConvert.DeserializeObject(JsonDataForSelect);
            var query = "";
            var items = root.SelectToken("Details").Children().OfType<JProperty>().ToDictionary(p => p.Name, p => p.Value);
            foreach (var item in items)
            {
                if (item.Key == "table")
                {
                    var tableName = item.Value;
                    query = string.Format("select from table {0} inner join table{1} where", tableName);
                }
                else if (item.Key == "keys")
                {
                    var key = item.Value.SelectToken("").OfType<JProperty>().ToDictionary(p => p.Name, p => p.Value);
                    var count = 0;
                    foreach (var id in key)
                    {
                        count++;
                        if (count == key.Count())
                        {
                            query += string.Format("{0} = {1}", id.Key, id.Value);
                        }
                        else
                        {
                            query += string.Format("{0} = {1} and ", id.Key, id.Value);
                        }
                    }

                }
            }
            return query;
        }
my json file as
Code:
{ 
           "Details":{ 
              "table":[ 
                 "MasterTable",
                 "FooterTable"
              ],
              "fields":{ 
                 "ItemCode":"string",
                 "Quantity":"int",
                 "Price":"decimal"

              },
              "keys":{ 
                 "BranchCode":1,
                 "Year":2019,
                 "Serial":2
              }
           }
    }
All fields exist on json from FooterTable only