add backend source code

backend/create_database.py

@@ -0,0 +1,26 @@
+"""创建数据库脚本"""
+import asyncio
+import asyncpg
+
+
+async def main():
+    conn = await asyncpg.connect(
+        'postgresql://postgresql:Jchl1528@192.168.110.252:15432/postgres'
+    )
+    try:
+        # 检查数据库是否存在
+        exists = await conn.fetchval(
+            "SELECT 1 FROM pg_database WHERE datname = 'hospital_performance'"
+        )
+        if exists:
+            print('数据库 hospital_performance 已存在')
+        else:
+            # 创建数据库
+            await conn.execute('CREATE DATABASE hospital_performance')
+            print('数据库 hospital_performance 创建成功')
+    finally:
+        conn.terminate()
+
+
+if __name__ == '__main__':
+    asyncio.run(main())