先過濾條件然后再根據表連接 同時在表中建立相關查詢字段的索引這樣在大數據多表聯合查詢的情況下速度相當快
創建索引：
create index ix_register_year ON dbo.selects(register_year)
SELECT M.*,SS.SensorCode,SS.SensorStatus,SS.ManufacturerId,SS.Electricity, SS.Voltage,SS.MinElectricity,SS.MinVoltage,SS.Temperature,SS.StatusUpdteDate,SS.UpdateStatus ,tp.PricingStrategyid,tps.FreeDuration,bat.BerthTypeId FROM (SELECT T.* , BS.ParkStatus,BS.ChangeTime ,CA.CantonName, SE.SectionName FROM (SELECT A.* ,B.BerthId,B.BerthCode,B.BerthAddress,B.BerthStatus,B.LineDirection,B.CantonId,B.SectionId FROM (SELECT AR.AreaId,AR.AreaCode,AR.AreaName FROM SYS_Area AS AR WHERE 1=1 AND AR.AreaCode='110' ) A LEFT JOIN SYS_Berth AS B ON B.AreaId=A.AreaId ) T JOIN SYS_BerthStatus AS BS ON T.BerthCode=BS.BerthCode JOIN SYS_Canton AS CA ON T.CantonId=CA.CantonId JOIN SYS_Section AS SE ON T.SectionId=SE.SectionId )M LEFT JOIN SYS_Sensor SS ON M.BerthCode=SS.BerthCode LEFT JOIN TRA_PricingBerth AS tp ON tp.BerthCode=M.BerthCode LEFT JOIN TRA_PricingStrategy AS tps ON tps.PricingStrategyId=tp.PricingStrategyId LEFT JOIN SYS_BerthAndType AS bat ON bat.BerthCode=M.BerthCode ORDER BY BerthCode ASC