sql - Firebird 2.1 TIMESTAMP arithmetic and civil intervals -

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इंटरबेश v6 के साथ रखने में, Firebird 2.5 एसक्यूएल -92 INTERVAL

कोड> कीवर्ड कम से कम, ऐसा सुझाव दिया गया है और मेरे दोहराए गए SQLCODE -104 त्रुटियों को INTERVAL s को फायरबर्ड के isql (1) के तहत काम करने की कोशिश कर रहा है।

, क्या हम समय की हमारी नागरिक गणनाओं में अनियमितताओं के लिए खाते हैं - महीनों समान रूप से लंबे समय तक नहीं हैं, न ही बचत के समय के साथ दिन और छलांग के समायोजन हैं, भ्रम के वर्ष का उल्लेख नहीं करने आदि - जब TIMESTAMP अंडरगेटिक अंडर फायरबर्ड 2.1?

मैं किसी दिए गए TIMESTAMP से आसानी से "एक महीने पहले" या "एक सप्ताह बाद" कैसे निर्धारित कर सकता हूं? कैसे "एक दिन बाद" या "दो घंटे पहले"?

आप का उपयोग कर सकते हैं और निर्मित- फ़ंक्शन में। वैकल्पिक रूप से आप क्लासिक भी उपयोग कर सकते हैं।


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