sql server - CROSS APPLY Performance -


क्या निम्न एसक्यूएल ले कर प्रदर्शन में सुधार करना संभव है: 

  SELECT t1.id , T1.name, t2.subname, t2.refvalue से तालिका 1 के रूप में टी 1 सीआरओएसएस लागू करें (टॉप 1 टी 2 यूबीआईडी, टी 2 स्यूबाइम, टी 3.फवल्यू से टेबल 2 एएस टी 2 इनर जॉइन टेबल 3 एटी टी 3 ऑन टी 2 ऑन टी 2 पर। ORDER द्वारा अंतिम अपडेड डीईएससी) एएस टी 2   
 और इसे फिर से लिखना ताकि यह इस तरह दिखता है:  
  SELECT t1.id, t1.name, t2.subname , T3.refvalue से तालिका 1 के रूप में टी 1 सीआरओएसएस लागू करें (टॉप 1 टी 2 यूबीआईडी, टी 2 एसबैमन से तालिका 2 के रूप में टीसीओ के अंतिम अपडेड डीईएससी द्वारा) टी 2 इनर जॉइन टेबल 3 के रूप में टी 3 ऑन टी 2 ऑन टी 2 ओवर।

सबसे पहले, क्या यह एक ही परिणाम देता है?

यदि इसलिए, क्वेरी योजना क्या कहती है, और सेट आँकड़े IO पर ?


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