Add a Node.js example

Author: cjbj

exadata-express/Example.js

@@ -0,0 +1,84 @@
+/*----------------------------------------------------------------------
+
+Example.js
+
+Demonstrate how to perform a database insert and query with Node.js in
+Oracle Database Cloud services such as Exadata Express, Autonomous
+Transaction Processing, Autonomous Data Warehouse, and others.
+
+Before running this script:
+ - Install Node.js and node-oracledb
+ - Install Oracle Instant Client
+ - Download and install the cloud service wallet
+ - Modify the connect() call below to use the credentials for your database.
+See your cloud service's documentation for details.
+
+----------------------------------------------------------------------*/
+
+var oracledb = require('oracledb');
+
+async function run() {
+  let connection;
+
+  try {
+
+    let sql, binds, options, result;
+
+    connection = await oracledb.getConnection(  {
+      user          : 'username',
+      password      : 'password',
+      connectString : 'connect_string'
+    });
+
+    // Create a table
+
+    await connection.execute(
+      `BEGIN
+         EXECUTE IMMEDIATE 'DROP TABLE mycloudtab';
+         EXCEPTION
+         WHEN OTHERS THEN
+           IF SQLCODE NOT IN (-00942) THEN
+             RAISE;
+           END IF;
+       END;`);
+
+    await connection.execute(
+      `CREATE TABLE mycloudtab (id NUMBER, data VARCHAR2(20))`);
+
+    // Insert some data
+
+    sql = `INSERT INTO mycloudtab VALUES (:1, :2)`;
+    binds = [ [101, "Alpha" ], [102, "Beta" ], [103, "Gamma" ] ];
+    options = {
+      autoCommit: true,
+      bindDefs: [
+        { type: oracledb.NUMBER },
+        { type: oracledb.STRING, maxSize: 20 }
+      ]
+    };
+
+    await connection.executeMany(sql, binds, options);
+
+    // Query the data
+
+    sql = `SELECT * FROM mycloudtab`;
+    binds = {};
+    options = {};
+
+    result = await connection.execute(sql, binds, options);
+    console.log(result.rows);
+
+  } catch (err) {
+    console.error(err);
+  } finally {
+    if (connection) {
+      try {
+        await connection.close();
+      } catch (err) {
+        console.error(err);
+      }
+    }
+  }
+}
+
+run();