这是我的查询，需要17.9397秒时间才能得到响应:SELECTallbar.iBarIDASiBarID,allbar.vNameASvName,allbar.tAddressAStAddress,allbar.tDescriptionAStDescription,(SELECTCOUNT(*)FROMtbl_postpWHEREp.vBarIDs=allbar.iBarID)AS`total_post`,allbar.bar_usbgASbar_usbg,allbar.bar_enhanceASbar_enhance,(SELECTcount(*)FROMtbl_userWHERE