diff --git a/db.ts b/db.ts
new file mode 100644
index 0000000..c309d3c
--- /dev/null
+++ b/db.ts
@@ -0,0 +1,28 @@
+import Dexie, { type EntityTable } from 'dexie';
+
+export interface Umpire {
+  id: number;
+  firstName: string;
+  lastName: string;
+  country: string;
+  gender: string;
+}
+
+export interface Court {
+  id: number;
+  umpireId: number | null;
+  serviceJudgeId: number | null;
+  order: number;
+}
+
+const db = new Dexie('CourtPilot') as Dexie & {
+  umpires: EntityTable<Umpire, 'id'>;
+  courts: EntityTable<Court, 'id'>;
+};
+
+db.version(1).stores({
+  umpires: '++id, lastName',
+  courts: '++id, umpireId, serviceJudgeId'
+});
+
+export { db };