SQL Calculated field selected values -

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मेरे पास एक एसक्यूएल व्यू कॉलम्स आईडीएक्स, DATE, सिग्नल, VALUE के साथ हमारे पास SIGNAL1 से SIGNAL10 मुझे क्या चाहिए कि दैनिक आधार पर एक गणना की गई कॉलम को निम्नानुसार गणना की जाती है: 

  compval = SIGNAL7 * SIGNAL8-SIGNAL9
< P> अन्य कॉलम मूल मानों को बनाए रखता है

यह कैसे करें?

आप एक और दृश्य बना सकते हैं या सिर्फ इस दृश्य को अपने दृश्य में जोड़ सकते हैं: 

  दृश्य v_view को चुनें v। के रूप में बनायें *, (SIGNAL7 * SIGNAL8-SIGNAL9) के रूप में first_view v से CompVal;

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