sql server - Need some t-sql clarification -

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यह टी-एसक्यूएल में एक अनुवर्ती है 

  SELECT SCOPE_IDENTITY () < / कोड>  
 एक बड़ा रिटर्न देता है, मैंने इसे INT को वापस करने के लिए निम्नलिखित किया है:  
  DECLARE @X INT INSERT ... SELECT @X = SCOPE_IDENTITY ( ) - यदि मैं नीचे दी गई रेखा को शामिल नहीं करता है, तो यह एक बड़ा चयन @ x  
 
 लौटाएगी, जब तक मैं अंत में SEX का चयन नहीं करूँगा?  <पी> पीएस 
 <पूर्व>  SELECT @X = SCOPE_IDENTITY ()

कुछ भी वापस नहीं लौटाता है, यह केवल सेट @ एक्स

< पी <> 
  चुनें SCOPE_IDENTITY ()

एक बड़ा रिटर्न जो आपने देखा है

< प्री> SELECT @X = SCOPE_IDENTITY ()

BIGINT लौटाता है और इसे INT चर में एक्सएक्स

देता है, इसलिए आप BIGINT SCOPE_IDENTITY लौट रहे हैं और साथ ही साथ कास्टिंग भी कर रहे हैं यह INT और उस परिणाम को @ एक्स के लिए सेट करना

रिटर्निंग @ एक्स INT परिणाम देता है।

SQL Server 7.0 पुस्तकें ऑनलाइन भी : "यह अनुशंसा की जाती है कि SET @local_variable को SELECT @local_variable की बजाय चर असाइनमेंट के लिए उपयोग किया जाये।"


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