diff --git a/api/methods.py b/api/methods.py
index 1164f8d..756b10d 100644
--- a/api/methods.py
+++ b/api/methods.py
@@ -251,7 +251,7 @@ UPDATE tenant_t
 
 
 def get_tenant_by_account(user, token_info, accountId=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
@@ -474,7 +474,7 @@ UPDATE flat_t
 
 
 def get_flat_by_premise(user, token_info, premiseId=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
@@ -643,7 +643,7 @@ SELECT
 
 
 def get_overhead_advance_flat_mapping_by_overhead_advance(user, token_info, overhead_advanceId=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
@@ -657,7 +657,7 @@ SELECT
     )
 
 def get_overhead_advance_flat_mapping_by_flat(user, token_info, flatId=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
@@ -753,7 +753,7 @@ UPDATE parking_t
 
 
 def get_parking_by_premise(user, token_info, premiseId=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
@@ -849,7 +849,7 @@ UPDATE commercial_premise_t
 
 
 def get_commercial_premise_by_premise(user, token_info, premiseId=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
@@ -975,7 +975,7 @@ UPDATE tenancy_t
 
 
 def get_tenancy_by_tenant(user, token_info, tenantId=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
@@ -994,7 +994,7 @@ SELECT
     )
 
 def get_tenancy_by_flat(user, token_info, flatId=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
@@ -1013,7 +1013,7 @@ SELECT
     )
 
 def get_tenancy_by_parking(user, token_info, parkingId=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
@@ -1032,7 +1032,7 @@ SELECT
     )
 
 def get_tenancy_by_commercial_premise(user, token_info, commercial_premiseId=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
@@ -1207,7 +1207,7 @@ SELECT
 
 
 def get_tenancy_fee_mapping_by_tenancy(user, token_info, tenancyId=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
@@ -1221,7 +1221,7 @@ SELECT
     )
 
 def get_tenancy_fee_mapping_by_fee(user, token_info, feeId=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
@@ -1303,7 +1303,7 @@ SELECT
 
 
 def get_account_entry_by_account(user, token_info, accountId=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
diff --git a/api/methods.py.tmpl b/api/methods.py.tmpl
index 519633b..6784c28 100644
--- a/api/methods.py.tmpl
+++ b/api/methods.py.tmpl
@@ -120,7 +120,7 @@ UPDATE ${table.name}_t
 #if (('foreignkey' in $column) and $column.foreignkey)
 
 def get_${table.name}_by_${column.name}(user, token_info, ${column.name}Id=None):
-    return dbGetOne(user, token_info, {
+    return dbGetMany(user, token_info, {
             "statement": """
 SELECT 
   id
diff --git a/ui/hv2-ui/src/app/app.module.ts b/ui/hv2-ui/src/app/app.module.ts
index 6e25287..8196fab 100644
--- a/ui/hv2-ui/src/app/app.module.ts
+++ b/ui/hv2-ui/src/app/app.module.ts
@@ -41,7 +41,6 @@ import { MatNativeDateModule } from '@angular/material/core';
 import { FeeListComponent } from './fee-list/fee-list.component';
 import { FeeDetailsComponent } from './fee-details/fee-details.component';
 
-
 @NgModule({
   declarations: [
     AppComponent,
@@ -84,7 +83,7 @@ import { FeeDetailsComponent } from './fee-details/fee-details.component';
     MatFormFieldModule,
     MatSelectModule,
     MatDatepickerModule,
-    MatNativeDateModule
+    MatNativeDateModule,
   ],
   providers: [
     { provide: HTTP_INTERCEPTORS, useClass: ErrorHandlerInterceptor, multi: true },
diff --git a/ui/hv2-ui/src/app/tenant-details/tenant-details.component.css b/ui/hv2-ui/src/app/tenant-details/tenant-details.component.css
index e69de29..bbe34f1 100644
--- a/ui/hv2-ui/src/app/tenant-details/tenant-details.component.css
+++ b/ui/hv2-ui/src/app/tenant-details/tenant-details.component.css
@@ -0,0 +1,11 @@
+table {
+    width: 75%;
+}
+
+.spacer {
+    flex: 1 1 auto;
+}
+
+#addoverheadfield {
+    margin-right: 15px;
+}
diff --git a/ui/hv2-ui/src/app/tenant-details/tenant-details.component.html b/ui/hv2-ui/src/app/tenant-details/tenant-details.component.html
index 002b221..006a4e5 100644
--- a/ui/hv2-ui/src/app/tenant-details/tenant-details.component.html
+++ b/ui/hv2-ui/src/app/tenant-details/tenant-details.component.html
@@ -3,12 +3,14 @@
         <mat-card-header>
             <mat-card-title>
                 {{tenant?.firstname}} {{tenant?.lastname}}
+                <button mat-button *ngIf="!collapseTenantDetails" (click)="collapseTenantDetails=true">Collapse</button>
+                <button mat-button *ngIf="collapseTenantDetails" (click)="collapseTenantDetails=false">Expand</button> 
             </mat-card-title>
             <mat-card-subtitle>
                 ID: {{tenant?.id}}
             </mat-card-subtitle>
         </mat-card-header>
-        <mat-card-content>
+        <mat-card-content *ngIf="!collapseTenantDetails">
             <div>
                 <form (ngSubmit)="saveTenant()">
                     <div>
@@ -75,4 +77,44 @@
             </div>
         </mat-card-content>
     </mat-card>
+    <mat-card class="defaultCard">
+        <mat-card-header>
+            <mat-card-title>
+                Mietverhältnisse
+            </mat-card-title>
+        </mat-card-header>
+        <mat-card-content>
+            <div>
+                <table mat-table [dataSource]="tenancyDataSource" #zftable>
+                    <ng-container matColumnDef="description">
+                        <th mat-header-cell *matHeaderCellDef>Beschreibung</th>
+                        <td mat-cell *matCellDef="let element">{{element.rawTenancy.description}}</td>
+                    </ng-container>
+                    <ng-container matColumnDef="flat">
+                        <th mat-header-cell *matHeaderCellDef>Wohnung</th>
+                        <td mat-cell *matCellDef="let element">{{element.flat}}</td>
+                    </ng-container>
+                    <ng-container matColumnDef="parking">
+                        <th mat-header-cell *matHeaderCellDef>Garage</th>
+                        <td mat-cell *matCellDef="let element">{{element.parking}}</td>
+                    </ng-container>
+                    <ng-container matColumnDef="commercial_premise">
+                        <th mat-header-cell *matHeaderCellDef>Büro</th>
+                        <td mat-cell *matCellDef="let element">{{element.commercial_premise}}</td>
+                    </ng-container>
+                    <ng-container matColumnDef="startdate">
+                        <th mat-header-cell *matHeaderCellDef>Beginn</th>
+                        <td mat-cell *matCellDef="let element">{{element.rawTenancy.startdate}}</td>
+                    </ng-container>
+                    <ng-container matColumnDef="enddate">
+                        <th mat-header-cell *matHeaderCellDef>Ende</th>
+                        <td mat-cell *matCellDef="let element">{{element.rawTenancy.enddate}}</td>
+                    </ng-container>
+                    <tr mat-header-row *matHeaderRowDef="tenancyDisplayColumns"></tr>
+                    <tr mat-row *matRowDef="let row; columns: tenancyDisplayColumns;"></tr>
+                </table>
+            </div>
+        </mat-card-content>
+    </mat-card>
+
 </section>
diff --git a/ui/hv2-ui/src/app/tenant-details/tenant-details.component.ts b/ui/hv2-ui/src/app/tenant-details/tenant-details.component.ts
index 1d06ebd..e922973 100644
--- a/ui/hv2-ui/src/app/tenant-details/tenant-details.component.ts
+++ b/ui/hv2-ui/src/app/tenant-details/tenant-details.component.ts
@@ -1,9 +1,18 @@
 import { Component, OnInit, ViewChild } from '@angular/core';
 import { ActivatedRoute, Router } from '@angular/router';
-import { AccountService, TenantService } from '../data-object-service';
-import { Account, Tenant } from '../data-objects';
+import { AccountService, CommercialPremiseService, FlatService, ParkingService, PremiseService, TenancyService, TenantService } from '../data-object-service';
+import { Account, CommercialPremise, Flat, NULL_Account, NULL_CommercialPremise, NULL_Flat, NULL_Parking, NULL_Tenant, Parking, Premise, Tenancy, Tenant } from '../data-objects';
 import { MessageService } from '../message.service';
 import { MatButton } from '@angular/material/button';
+import { MatTableDataSource } from '@angular/material/table';
+
+
+interface DN_Tenancy {
+  rawTenancy: Tenancy
+  flat: string
+  parking: string
+  commercialPremise: string  
+}
 
 @Component({
   selector: 'app-tenant-details',
@@ -12,32 +21,28 @@ import { MatButton } from '@angular/material/button';
 })
 export class TenantDetailsComponent implements OnInit {
 
-  tenant: Tenant = {
-    id: 0, 
-    salutation: '', 
-    firstname: '', 
-    lastname: '', 
-    address1: '', 
-    address2: '', 
-    address3: '', 
-    zip: '', 
-    city: '', 
-    phone1: '', 
-    phone2: '', 
-    iban: '', 
-    account: 0
-  }
+  tenant: Tenant = NULL_Tenant
 
-  account: Account = {
-    id: 0,
-    description: ''
-  }
+  account: Account = NULL_Account
+
+  tenancies: DN_Tenancy[] = []
+  tenancyDataSource: MatTableDataSource<DN_Tenancy>
+  tenancyDisplayColumns: string[] = [ "description", "flat", "parking", "commercial_premise", "startdate", "enddate" ]
+
+  collapseTenantDetails: boolean = false
+  collapseTenancies: boolean = false
+  
 
   @ViewChild('submitButton') submitButton: MatButton
 
   constructor(
     private tenantService: TenantService, 
     private accountService: AccountService,
+    private tenancyService: TenancyService,
+    private flatService: FlatService,
+    private parkingService: ParkingService,
+    private commercialPremiseService: CommercialPremiseService,
+    private premiseService: PremiseService,
     private messageService: MessageService,
     private route: ActivatedRoute,
     private router: Router
@@ -49,6 +54,24 @@ export class TenantDetailsComponent implements OnInit {
       if (id != 0) {
         this.tenant = await this.tenantService.getTenant(id)
         this.account = await this.accountService.getAccount(this.tenant.account)
+
+        const premises: Premise[] = await this.premiseService.getPremises()
+        const premisesDict = new Map<number, Premise>()
+        for (let p of premises) {
+          premisesDict.set(p.id, p)
+        }
+        for (let t of await this.tenancyService.getTenancysByTenant(this.tenant.id)) {
+          const flat: Flat = (t.flat) ? await this.flatService.getFlat(t.flat) : NULL_Flat
+          const parking: Parking = (t.parking) ? await this.parkingService.getParking(t.parking) : NULL_Parking
+          const commercialPremise: CommercialPremise = (t.commercial_premise) ? await this.commercialPremiseService.getCommercialPremise(t.commercial_premise) : NULL_CommercialPremise
+          this.tenancies.push({
+            rawTenancy: t,
+            flat: (flat != NULL_Flat) ? `${flat.description} (${premisesDict.get(flat.premise).description})` : '',
+            parking: (parking != NULL_Parking) ? `${parking.description} (${premisesDict.get(parking.premise).description})` : '',
+            commercialPremise: (commercialPremise != NULL_CommercialPremise) ? `${commercialPremise.description} (${premisesDict.get(commercialPremise.premise).description})` : ''
+          })
+        }
+        this.tenancyDataSource = new MatTableDataSource<DN_Tenancy>(this.tenancies)
       }
     } catch (err) {
       this.messageService.add(JSON.stringify(err, undefined, 4))