mysql - total count each day sorted, result grouped by week -

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मेरी क्वेरी अभी इस तरह दिखती है बहुत सरल: 

  select count (*), तिथि (visit_date), दिनांक (visit_date) द्वारा विज़िट समूह से DATE_FORMAT (visit_date, "% a")   
 यहाँ परिणाम है:  
  < P> मैं क्या करना चाहता हूं:  
     
  1.  प्रत्येक हफ्ते के लिए गिनती हल हो गई है   
     क्या आप मेरी क्वेरी को संशोधित कर सकते हैं ताकि वह मानदंडों को संतुष्ट कर सके?  
      
     
      SELECT count (*), सालवीक (विज़िट_डेट) से विज़िट ग्रुप द्वारा सालवीक (विज़िट _डेट) सालवार (यात्रा_डेट) एएससी;

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