sql - Mysql: How do you create a table with multiple primary keys? -

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मेरे पास यह स्थिति है:

(तालिका वेतन )

आप एकाधिक प्राथमिक कुंजी के साथ एक तालिका कैसे बना सकते हैं? 

  तालिका वेतन बनाना (dep_id छोटी-छोटी ऑटो_इनक्रियम प्राथमिक कुंजी, emp_id छोटी-छोटी ऑटो_इनक्रिमेंट प्राथमिक कुंजी, bla varchar (20 ));

अगर मैं उपरोक्त कोड की कोशिश करता हूं तो मुझे एक त्रुटि मिलती है किसी भी विचार?

एक तालिका में केवल एक प्राथमिक कुंजी हो सकती है हालांकि, प्राथमिक कुंजी में कई कॉलम शामिल हो सकते हैं, उदाहरण के लिए 

  सब्सक्राइबर के वेतन (डिपाइड स्किलिंग अनअंसेंटेड नल, ए_आईड स्माललिंग अनसैंटेड नल, ब्लॉ VARCHAR (20), प्राइमरी की (डिपा_आईडी, एएनआईडी) ));

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