From c1c37c6c70beef547eaeb82e0de2f643e9dfc451 Mon Sep 17 00:00:00 2001
From: Yan Kuang <YTKme@Outlook.com>
Date: Mon, 9 Dec 2024 23:50:05 -0800
Subject: [PATCH] Add DuckDB Example (#1232)

---
 examples/duckdb.ts | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 examples/duckdb.ts

diff --git a/examples/duckdb.ts b/examples/duckdb.ts
new file mode 100644
index 000000000..9599a8177
--- /dev/null
+++ b/examples/duckdb.ts
@@ -0,0 +1,36 @@
+/**
+ * @title Connect to DuckDB
+ * @difficulty intermediate
+ * @tags cli, deploy
+ * @run --allow-read --allow-write --allow-env --allow-net --allow-ffi <url>
+ * @resource {https://deno.land/x/duckdb} Deno DuckDB on deno.land/x
+ * @resource {https://duckdb.org/} DuckDB - An in-process SQL OLAP database management system
+ * @resource {https://github.com/suketa/ruby-duckdb?tab=readme-ov-file#pre-requisite-setup-linux} DuckDB Pre-requisite setup (Linux)
+ * @group Databases
+ *
+ * Using Deno with DuckDB, you can connect to memory or a persistent
+ * database with a filename.
+ */
+
+import { open } from "https://deno.land/x/duckdb/mod.ts";
+
+// const db = open("./example.db");
+const db = open(":memory:");
+
+const connection = db.connect();
+
+for (const row of connection.stream("select 42 as number")) {
+  console.debug(`Row Number: ${row.number}`); // -> { number: 42 }
+}
+
+const prepared = connection.prepare(
+  "SELECT ?::INTEGER AS number, ?::VARCHAR AS text;",
+);
+
+const result = prepared.query(1337, "foo"); // [{ number: 1337, text: 'foo' }]
+
+console.debug(`Number: ${result[0].number}`);
+console.debug(`Text: ${result[0].text}`);
+
+connection.close();
+db.close();