爲什麼select不走索引呢？

select "環節號","案件記錄號","市民姓名","市民電話","錄入時間","領導批示","辦理時間","案件類型","接線員","詳細地址","主辦部門","數據來源","辦理方案","派單員","派單員備註","退回重辦說明","案件公文號","隱藏當事人資料","來話內容","案件級別","派發時間","實際完成時間","規定完成時間","是否回訪","前臺案件類型","主辦發送標誌

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