Laravel querybuilder distinct function not working in search - mysql

Question

I tried putting distinct() in my query but when i get the results in my frontend and in the api, I still get duplicate records. Does anyone know why distinct is not working in my code?
My code
$result = DB::connection('mysql2')
->table('xp_pn_ura_transactions')
->whereRaw(DB::raw("CONCAT(block, ' ', street,' ',project_name,' ', postal_code,'')LIKE '%$request->projectname%' order by STR_TO_DATE(sale_date, '%d-%M-%Y') asc"))
->limit($request->limit)
->distinct()
->get();
return \Response::json(array(
//'total_count' => $count,
'result' => $result,
));
Front end result
My response, I only get the first two objects that duplicates
{
"id": 228686,
"transtype": "RESI",
"project_name": "WATERFRONT WAVES",
"unitname": "08-06 ",
"block": "760",
"street": "Bedok Reservoir Road ",
"level": "08",
"stack": "06 ",
"no_of_units": "1",
"area": "147",
"type_of_area": "Strata",
"transacted_price": "1300500",
"nettprice": "-",
"unitprice_psm": "8847",
"unitprice_psf": "822",
"sale_date": "20-JAN-2008",
"contract_date": " ",
"property_type": "Condominium",
"tenure": "99 Yrs From 31/10/2007",
"completion_date": "Uncompleted",
"type_of_sale": "New Sale",
"purchaser_address_indicator": "Private",
"postal_district": "16",
"postal_sector": "47",
"postal_code": "479245",
"planning_region": "East Region",
"planning_area": "Bedok",
"update_time": "2019-12-09 17:14:35"
},
{
"id": 224686,
"transtype": "RESI",
"project_name": "WATERFRONT WAVES",
"unitname": "08-06 ",
"block": "760",
"street": "Bedok Reservoir Road ",
"level": "08",
"stack": "06 ",
"no_of_units": "1",
"area": "147",
"type_of_area": "Strata",
"transacted_price": "1300500",
"nettprice": "-",
"unitprice_psm": "8847",
"unitprice_psf": "822",
"sale_date": "20-JAN-2008",
"contract_date": " ",
"property_type": "Condominium",
"tenure": "99 Yrs From 31/10/2007",
"completion_date": "Uncompleted",
"type_of_sale": "New Sale",
"purchaser_address_indicator": "Private",
"postal_district": "16",
"postal_sector": "47",
"postal_code": "479245",
"planning_region": "East Region",
"planning_area": "Bedok",
"update_time": "2019-12-09 17:11:57"
}
They got different id but same records, is there a way to ignore the id and get the other fields?

Answer 1

You need to select the field that you need to distinct, or it will distinct all the fields that you selected:
So according to your post, the id and updated_time are not duplicated, you don't need to select it out.
Try something like this:
$result = DB::connection('mysql2')
->table('xp_pn_ura_transactions')
->whereRaw(DB::raw("CONCAT(block, ' ', street,' ',project_name,' ', postal_code,'')LIKE '%$request->projectname%' order by STR_TO_DATE(sale_date, '%d-%M-%Y') asc"))
->limit($request->limit)
# select the fields which is duplicated.(In your post, select the field without id and updated_time)
->select("transtype",
"project_name",
"unitname",
"block",
"street",
"level",
"stack",
"no_of_units",
"area",
"type_of_area",
"transacted_price",
"nettprice",
"unitprice_psm",
"unitprice_psf",
"sale_date",
"contract_date",
"property_type",
"tenure",
"completion_date",
"type_of_sale",
"purchaser_address_indicator",
"postal_district",
"postal_sector",
"postal_code",
"planning_region",
"planning_area")
->distinct()
->get();
if you need to select the fields not duplicated, you can use groupBy() instead of distinct()