And now in the file `sql_app/main.py` let's integrate and use all the other parts we created before.

### Create the database tables

In a very simplistic way create the database tables:

```Python hl_lines="9-11"
{!../../../docs_src/sql_databases_peewee/sql_app/main.py!}
```

### Create a dependency

Create a dependency that will connect the database right at the beginning of a request and disconnect it at the end:

		return dsc.syncNodes(ctx, ds, oldPodsToDelete, nil, hash)
	}

	// When surging, we create new pods whenever an old pod is unavailable, and we can create up
	// to maxSurge extra pods
	//
	// Assumptions:
	// * Expect manage loop to allow no more than two pods per node, one old, one new
	// * Expect manage loop will create new pods if there are no pods on node
	// * Expect manage loop will handle failed pods

	// if you are creating a thing, you should always be allowed to set an owner ref since you logically had the power
	// to never create it.  We still need to check block owner deletion below, because the power to delete does not
	// imply the power to prevent deletion on other resources.
	if attributes.GetOperation() != admission.Create {
		deleteAttributes := authorizer.AttributesRecord{
			User:            attributes.GetUserInfo(),

// ControllerRevisions. This method should be used to create an Interface for all scenarios other than testing.
func NewHistory(client clientset.Interface, lister appslisters.ControllerRevisionLister) Interface {
	return &realHistory{client, lister}
}

// NewFakeHistory returns an instance of Interface that uses informer to create, update, list, and delete
// ControllerRevisions. This method should be used to create an Interface for testing purposes.

		}
	}

	// Creating a stagingPath directory before call to NodeStageVolume
	if err := os.MkdirAll(stagingPath, 0750); err != nil {
		return "", errors.New(log("blockMapper.stageVolumeForBlock failed to create dir %s: %v", stagingPath, err))
	}
	klog.V(4).Info(log("blockMapper.stageVolumeForBlock created stagingPath directory successfully [%s]", stagingPath))

	// Request to stage a block volume to stagingPath.

      }
    },
    LinkedHashMultisetImpl {
      @Override
      public <E extends Comparable<E>> Multiset<E> create(Collection<E> contents) {
        return LinkedHashMultiset.create(contents);
      }
    },
    ConcurrentHashMultisetImpl {
      @Override
      public <E extends Comparable<E>> Multiset<E> create(Collection<E> contents) {
        return ConcurrentHashMultiset.create(contents);
      }

				a("g", "v", "r", "exec", "name", admission.Create, &metav1.CreateOptions{}),
				a("2", "v", "r2", "proxy", "name", admission.Create, &metav1.CreateOptions{}),
				a("2", "v", "r3", "proxy", "name", admission.Create, &metav1.CreateOptions{}),
			),
			noMatch: attrList(
				a("g", "v", "r", "", "name", admission.Create, &metav1.CreateOptions{}),
				a("2", "v", "r2", "", "name", admission.Create, &metav1.CreateOptions{}),

            ContiguousSet.create(Range.closed(1, 3), integers()),
            ContiguousSet.closed(1, 3),
            ContiguousSet.create(Range.closedOpen(1, 4), integers()),
            ContiguousSet.closedOpen(1, 4),
            ContiguousSet.create(Range.openClosed(0, 3), integers()),
            ContiguousSet.create(Range.open(0, 4), integers()),
            ContiguousSet.create(Range.closed(1, 3), NOT_EQUAL_TO_INTEGERS),

	Metrics.ObserveMatchConditionEvalError(context.TODO(), "x", kindWebhook, stepValidate, string(admission.Create))
	Metrics.ObserveMatchConditionEvalError(context.TODO(), "x", kindPolicy, stepAdmit, string(admission.Create))
	Metrics.ObserveMatchConditionEvalError(context.TODO(), "x", kindPolicy, stepValidate, string(admission.Create))
	wantLabelsCounterPolicyAdmit := map[string]string{

    Multiset<String> ms1 = HashMultiset.create();
    Multiset<String> ms2 = HashMultiset.create(Arrays.asList("a", "b", "a"));
    assertEquals(ms2, Multisets.union(ms1, ms2));
  }

  public void testUnionNonemptyEmpty() {
    Multiset<String> ms1 = HashMultiset.create(Arrays.asList("a", "b", "a"));
    Multiset<String> ms2 = HashMultiset.create();
    assertEquals(ms1, Multisets.union(ms1, ms2));
  }