Tuning A Delete Statement

Hi,

I need to delete the following records (from enrollment_fact):


SELECT
a."STU_SID",
a."SCHOOL_YEAR",
a."DATE_SID",
a."LOC_SID"
FROM "dbo"."ENROLLMENT_FEX2" b,
"dbo"."LOCATION_DIM" c
LEFT OUTER JOIN
"dbo"."ENROLLMENT_FACT" a
on c."LOC_SID" = a."LOC_SID"
WHERE
b."LOC_KEY" = c."LOC_KEY"
and
a."DATE_SID" between b."MIN_DATE" and b."MAX_DATE"


This is the approach (excuse the misuse of the concat function, but you get the idea)


DELETE FROM "dbo"."ENROLLMENT_FACT"
WHERE CONCAT (a."STU_SID", a."SCHOOL_YEAR", a."DATE_SID", a."LOC_SID")
IN (
SELECT DISTINCT CONCAT (a."STU_SID",
a."SCHOOL_YEAR",
a."DATE_SID",
a."LOC_SID"
)
FROM "dbo"."ENROLLMENT_FEX2" b,
"dbo"."LOCATION_DIM" c
LEFT OUTER JOIN "dbo"."ENROLLMENT_FACT" a
ON c."LOC_SID" = a."LOC_SID"
AND a."DATE_SID" BETWEEN b."MIN_DATE"
AND b."MAX_DATE")


comments? better way? (without using an sp)

thanks