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Expand Up @@ -147,7 +147,7 @@ Tag-based filtering implements precise filtering based on character strings. You

## Attribute-based SQL filtering

Attribute-based SQL filtering is an advanced message filtering method provided byApache RocketMQ. It filters messages based on the attributes and attribute values, which are also called keys and values, that producers configure for messages. Producers can set multiple attributes for a message. Consumers can then specify attributes in SQL expressions to receive certain messages.
Attribute-based SQL filtering is an advanced message filtering method provided by Apache RocketMQ. It filters messages based on the attributes and attribute values, which are also called keys and values, that producers configure for messages. Producers can set multiple attributes for a message. Consumers can then specify attributes in SQL expressions to receive certain messages.

:::info
Because tags are a system attribute, tag-based filtering is a type of attribute-based SQL filtering. In SQL syntaxes, the tag attribute is represented by TAGS.
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