sql - Select count and aggregate, but only unique -

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मेरे पास टेबल के साथ एक डाटाबेस (MSSQL) है: 

  बनाएँ तालिका [ डीपीए] [साइप्रर्स] ([टाइम] [डेटाइम] NULL, [होस्टनाम] [वरारार] (50) नल, [क्लाइंटआईपी] [वरारार] (50) नल, [यूजरएजेंट] [वरारार] (550) नल, [साइफर नेम ] [दोहराव] (200) नल, [साइफरवर्सन] [वरचर] (100) नल, [साइफरबिट्स] [वरारार] (50) नल) पर [प्राथमिक]   
 कुछ पंक्तियाँ इस तरह दिख सकते हैं:  
 यहां छवि विवरण दर्ज करें  
 अब  
  
  का चयन करें CipherName, CipherVersion, CipherBits, मैं प्रत्येक शीर्ष स्तर डोमेन के लिए CipherName, CipherVersion और CipherBits के संयोजन की घटनाओं की संख्या की गणना करना चाहते हैं। , सीआईपीआरएन नाम, साइफरविर्सियन, साइफरबिट्स द्वारा समूह '% domain.com' समूह की तरह सीपर्स से "हिट्स" के रूप में, "हिट्स",   
 क्रैक्स यह है कि मैं केवल विशिष्ट उदाहरणों की गिनती करना चाहता हूं प्रत्येक ग्राहक आईपी यही है, अगर कोई ग्राहक sub.domain.com और test.domain.com पर गया है तो मैं इसे दो के रूप में नहीं मानना ​​चाहता, बस एक।   
 
 
 यह देखते हुए कि आप  HostName  द्वारा समूह नहीं कर रहे हैं, ऐसा लगता है कि आपकी ज़रूरत है:  
  SELECT CipherName , साइफरविर्सन, साइफर बिट्स, COUNT (अलग क्लाइंटआईपी) सिफर से "हिट्स" के रूप में होस्टनाम '% domain.com' जैसे साइप्रम्बर, साइफरविर्सियन, साइफरबिट्स द्वारा समूह;

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