diff --git a/app/internal/model/db.json b/app/internal/model/db.json
index 9007e84..0908abf 100644
--- a/app/internal/model/db.json
+++ b/app/internal/model/db.json
@@ -2,6 +2,30 @@
 	{
 		"name": "public.measurement",
 		"fields": [
+			{
+				"name": "b_gem_1",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "b_gem_2",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "b_gem_3",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "b_gem_n",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
 			{
 				"name": "c_gem_1",
 				"data_type": "double precision",
@@ -17,6 +41,12 @@
 				"data_type": "double precision",
 				"size": 8
 			},
+			{
+				"name": "c_gem_n",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
 			{
 				"name": "ep_1",
 				"data_type": "double precision",
@@ -32,6 +62,12 @@
 				"data_type": "double precision",
 				"size": 8
 			},
+			{
+				"name": "freq",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
 			{
 				"name": "i_gem_1",
 				"data_type": "double precision",
@@ -47,6 +83,12 @@
 				"data_type": "double precision",
 				"size": 8
 			},
+			{
+				"name": "i_gem_n",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
 			{
 				"name": "i_max_1",
 				"data_type": "double precision",
@@ -62,11 +104,59 @@
 				"data_type": "double precision",
 				"size": 8
 			},
+			{
+				"name": "ithd_1",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "ithd_2",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "ithd_3",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "ithd_n",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
 			{
 				"name": "meter_id",
 				"data_type": "integer",
 				"size": 4
 			},
+			{
+				"name": "p_gem_1",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "p_gem_2",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "p_gem_3",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "p_gem_n",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
 			{
 				"name": "p_max_1",
 				"data_type": "double precision",
@@ -82,6 +172,30 @@
 				"data_type": "double precision",
 				"size": 8
 			},
+			{
+				"name": "s_gem_1",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "s_gem_2",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "s_gem_3",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "s_gem_n",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
 			{
 				"name": "s_max_1",
 				"data_type": "double precision",
@@ -116,6 +230,36 @@
 				"name": "u_gem_3",
 				"data_type": "double precision",
 				"size": 8
+			},
+			{
+				"name": "u_gem_n",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "uthd_1",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "uthd_2",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "uthd_3",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
+			},
+			{
+				"name": "uthd_n",
+				"data_type": "double precision",
+				"null": true,
+				"size": 8
 			}
 		]
 	},
diff --git a/app/pq.go b/app/pq.go
index 7302262..6903f94 100644
--- a/app/pq.go
+++ b/app/pq.go
@@ -3,6 +3,7 @@ package app
 import (
 	"fmt"
 	"reflect"
+	"strings"
 	"time"
 
 	"git.fuyu.moe/5GPowerQuality/api/app/internal/model"
@@ -103,7 +104,13 @@ func GetAttribute(index, meter int, date time.Time) (data []Phases) {
 		r.Field(index+1).Interface().(*qb.TableField),
 		r.Field(index+2).Interface().(*qb.TableField)
 
-	q := m.Select(m.Time, f1, f2, f3).
+	rN := r.Field(index + 3)
+	fN := qb.Value(nil)
+	if rN.IsValid() && strings.HasSuffix(r.Type().Field(index+3).Name, `N`) {
+		fN = rN.Interface().(*qb.TableField)
+	}
+
+	q := m.Select(m.Time, f1, f2, f3, fN).
 		OrderBy(qb.Desc(m.Time)).
 		Where(
 			qc.Gte(m.Time, date),
@@ -117,7 +124,7 @@ func GetAttribute(index, meter int, date time.Time) (data []Phases) {
 
 	for rows.Next() {
 		var phases Phases
-		err := rows.Scan(&phases.Time, &phases.P1, &phases.P2, &phases.P3)
+		err := rows.Scan(&phases.Time, &phases.P1, &phases.P2, &phases.P3, &phases.N)
 		if err != nil {
 			panic(err)
 		}
@@ -134,4 +141,5 @@ type Phases struct {
 	P1   float64   `json:"phase_1"`
 	P2   float64   `json:"phase_2"`
 	P3   float64   `json:"phase_3"`
+	N    *float64  `json:"null"`
 }