convert SQL to SWQL

Can any one helpme convert below sql query to SWQL. Basically this query give output in chart for custom time period.(exclude daily maintenance period 01.00am to 03.00am)

DECLARE @StartDate DATETIME, @EndDate DATETIME

SET @StartDate = dateadd(mm, -1, getdate())

SET @StartDate = dateadd(dd, datepart(dd, getdate())*-1, @StartDate)

SET @EndDate = dateadd(mm, 1, @StartDate)

SELECT  TOP 999999999 Convert(DateTime,Floor(Cast((DateTime) as Float)*24)/24,0) AS SummaryDateTime,

Nodes.Caption AS NodeName,

Nodes.IP_Address AS IP_Address,

AVG(CPULoad.AvgLoad) AS AVERAGE_of_AvgCPULoad,

Nodes.NodeID AS NodeID

FROM

Nodes INNER JOIN CPULoad ON (Nodes.NodeID = CPULoad.NodeID)

WHERE

( DateTime BETWEEN @startDate AND @EndDate )

AND

Nodes.caption = '${caption}'

AND

CONVERT(varchar, DateTime,108) BETWEEN '03:00:00' AND '12:59:00'

)

GROUP BY Convert(DateTime,Floor(Cast((DateTime) as Float)*24)/24,0),

Nodes.Caption, Nodes.IP_Address, Nodes.NodeID

ORDER BY SummaryDateTime ASC