id, mac_address, agent_id, session_id, sort, chat_type, content, audio, audio_url, created_at, updated_at SELECT DISTINCT audio_id FROM ai_agent_chat_history WHERE agent_id = #{agentId} AND audio_id IS NOT NULL DELETE FROM ai_agent_chat_audio WHERE id IN #{id} UPDATE ai_agent_chat_history SET audio_id = NULL WHERE agent_id = #{agentId} DELETE FROM ai_agent_chat_history WHERE agent_id = #{agentId}