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id=\"%e5%af%a6%e9%9a%9b%e6%a1%88%e4%be%8b%e5%88%86%e6%9e%90-USmliTgAXP\">\u5be6\u969b\u6848\u4f8b\u5206\u6790<\/h2>\n<p>\u5728\u9078\u64c7\u6578\u64da\u5eab\u6027\u80fd\u5de5\u5177\u6642\uff0c\u53c3\u8003\u5be6\u969b\u6848\u4f8b\u53ef\u4ee5\u63d0\u4f9b\u6709\u50f9\u503c\u7684\u898b\u89e3\u3002\u4f8b\u5982\uff0c\u4e00\u5bb6\u96fb\u5b50\u5546\u52d9\u516c\u53f8\u5728\u4f7f\u7528 MySQL \u6578\u64da\u5eab\u6642\uff0c\u767c\u73fe\u67e5\u8a62\u901f\u5ea6\u8b8a\u6162\u3002\u7d93\u904e\u5206\u6790\uff0c\u4ed6\u5011\u9078\u64c7\u4e86\u4f7f\u7528 <code>EXPLAIN<\/code> \u547d\u4ee4\u4f86\u6aa2\u67e5\u67e5\u8a62\u8a08\u5283\uff0c\u4e26\u767c\u73fe\u67d0\u4e9b\u67e5\u8a62\u7f3a\u5c11\u7d22\u5f15\u3002\u901a\u904e\u6dfb\u52a0\u7d22\u5f15\uff0c\u4ed6\u5011\u6210\u529f\u5730\u5c07\u67e5\u8a62\u901f\u5ea6\u63d0\u9ad8\u4e86 50%\u3002<\/p>\n<h2 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