ms access - Sql query to find total percentage -

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  का चयन करें tblItems.ItemType, Count (tblItems.ItemType) से कुल TblItems WHERE (((tblItems.Pool) 188 और 218 के बीच)) ग्रुप द्वारा टीबीआईटीम्स। इटम टाईप;   
 यह मेरी वर्तमान क्वेरी है और यह आइटम एक पंक्ति में प्रिंट करता है और कुल बार नामित दूसरी पंक्ति में दिखाई देता है। मैं प्रतिशत के साथ एक और पंक्ति बनाने में सक्षम होना चाहता हूं यह कुल वस्तुओं का है मैंने गिनती के बाद जोड़ने की कोशिश की  (कुल / कुल (कुल)) के रूप में pct_total  लेकिन यह काम नहीं करता है मुझे मिले त्रुटि "अभिव्यक्ति (योग) में उपकुंजीएं नहीं उपयोग की जा सकतीं (योग) (कुल))"   
 
 
 यहां एक विधि है:  
  चुनें i.ItemType, गणना (i.ItemType) कुल, गणना (*) * 1.0 / (tblItems से चुनें संख्या (*) जहां 188 और 218 के बीच पूल) के रूप में अनुपात से I

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