I use the following SPT string in a loop through several part numbers at a time. The process is very slow. What can I do to this SPT statement or my data files to make it faster?

sql = "Select recseq, CASE WHEN faistatus = 1" +
					" THEN 'Accepted' WHEN faistatus = 2 THEN 'Rejected' ELSE 'SEE ORIGINAL FAI' END" +
					" As fais, inspectord, dwgrev, datstmpi From webprddt6.drawmfai mt1" +	
					" JOIN ( SELECT webprddt6.drawmfai.partno, MAX(webprddt6.drawmfai.datstmpi) AS MaxDate FROM webprddt6.drawmfai Where toolinspr = 0 And conformir = 0 And DATE(datstmpin) is Not NULL GROUP BY webprddt6.drawmfai.partno) mt3" +
					" ON mt3.partno = mt1.partno AND mt3.MaxDate = mt1.datstmpi" +
					" Where mt1.partno in('" + arg1.trim() + "','" + pnmod + "','" + modpartno + "','" + arg1.trim().substring(0,11) + "','" + arg1.trim().substring(0,10) + "','" + arg1.trim().substring(0,9) + "','" + arg1.trim().substring(0,8) +
					"') And toolinspr = 0 And conformir = 0";