datetime - MySQL SELECT Month from a particular year -

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हां मैंने दस्तावेज़ पढ़ा है

मेरे पास निम्न प्रश्न हैं: 

  SELECT * से db.table WHERE event_type = 3 और (YEAR (event_time) = 2014 और माह (event_time) = 10)

यह अक्टूबर 2014 से सभी रिकॉर्ड देता है। ग्रेट । केवल पूछना चाहता था, (YEAR (event_time) = 2014 और महीना (event_time) = 10) लिखने के लिए, वहाँ एक छोटा, बेहतर या संकाय तरीका है? क्या यह किसी भी वर्ष में एक विशिष्ट महीने निकालने का "पारंपरिक" तरीका है?

यहां सीखना।

यदि आपके पास event_time कॉलम पर कोई अनुक्रमणिका है, तो YEAR और MONTH (या बहुत ज्यादा किसी भी फ़ंक्शन) का उपयोग करके सूचकांक पूरी तरह से क्वेरी को अनुकूलित करने के लिए उपयोग किया जा रहा है ऐसा कुछ सबसे तेज होगा; मैं यह निर्धारित करने के लिए छोड़ दूँगा कि क्या यह सबसे अच्छा है:

<प्री> <कोड> SELECT * FROM से db.table WHERE event_type = 3 और event_time & gt; = '2014-10-01' और event_time & lt; '2014-11-01'

यह आपको अक्टूबर 2014 में सबकुछ देगा, और यह पूरी तरह से अनुकूलन योग्य है।


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