# Save data to Oracle DB

Create t_mqtt_msg table:

CREATE TABLE t_mqtt_msg (msgid VARCHAR2(64),topic VARCHAR2(255), qos NUMBER(1), payload NCLOB)
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Create rules:

Open EMQ X Dashboard (opens new window) and select the "Rules" tab on the left.

Fill in the rule SQL:

SELECT * FROM "t/#"
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Related actions:

In the "Response Action" interface, select "Add", and then select "Save Data to Oracle Database" in the "Action" drop-down box.

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Fill in the action parameters:

The "Save data to Oracle Database" action requires two parameters:

1). SQL template. In this example, we insert a piece of data into Oracle Database. The SQL template is:

INSERT INTO T_MQTT_MSG (MSGID, TOPIC, QOS, PAYLOAD) values ('${id}', '${topic}', '${qos}', '${payload}');
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2). The ID of the associated resource. Now that the resource drop-down box is empty, and you can click "New Resource" in the upper right corner to create an Oracle Database resource:

Fill in the resource configuration:

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Click the "New" button.

Return to the response action interface and click "OK".

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Return to the rule creation interface and click "Create".

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In the rule list, click the "View" button or the rule ID connection to preview the rule just created:

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The rule has been created. Now, send a piece of data:

Topic: "t/a"
QoS: 1
Payload: "hello"
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View the number of rule hits

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