diff --git a/backend/src/models/customer.rs b/backend/src/models/customer.rs
index f41bd69..9741a73 100644
--- a/backend/src/models/customer.rs
+++ b/backend/src/models/customer.rs
@@ -63,14 +63,30 @@ impl CrudBackend for Customer {
         conn: impl sqlx::prelude::Executor<'a, Database = sqlx::Postgres>,
         id: Self::Identifier,
     ) -> Result<Self> {
-        todo!()
+        sqlx::query_as!(Customer, r#"SELECT * FROM customers WHERE id = $1"#, id)
+            .fetch_one(conn)
+            .await
+            .map_err(Into::into)
     }
 
     async fn update_inner(&mut self, conn: &mut PgConnection) -> Result<()> {
-        todo!()
+        sqlx::query!(
+            r#"UPDATE customers SET name = $1, code = $2 WHERE id = $3"#,
+            self.name,
+            self.code,
+            self.id
+        )
+        .execute(conn)
+        .await
+        .map_err(Into::into)
+        .map(|_| ())
     }
 
     async fn delete_inner(&self, conn: &mut PgConnection) -> Result<()> {
-        todo!()
+        sqlx::query!(r#"DELETE FROM customers WHERE id = $1"#, self.id)
+            .execute(conn)
+            .await
+            .map_err(Into::into)
+            .map(|_| ())
     }
 }