{"id":346,"date":"2013-01-03T18:29:47","date_gmt":"2013-01-03T10:29:47","guid":{"rendered":"http:\/\/www.cnmiss.cn\/?p=346"},"modified":"2013-02-18T16:09:33","modified_gmt":"2013-02-18T08:09:33","slug":"mysql-5-1%e5%88%86%e5%8c%ba%e6%8a%80%e6%9c%af%e5%88%9d%e6%8e%a2%ef%bc%88%e5%85%ad%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.cnmiss.cn\/?p=346","title":{"rendered":"MySQL 5.1\u5206\u533a\u6280\u672f\u521d\u63a2\uff08\u516d\uff09"},"content":{"rendered":"

3.3 \u8fde\u63a5\u67e5\u8be2
\n\u540c\u6837\u5730\uff0c\u5bf9\u4e8e\u8fde\u63a5\u67e5\u8be2\uff0c\u5728\u6709\u6ca1\u6709\u5206\u533a\u7684\u6761\u4ef6\u4e0b\uff0c\u5c06\u6709\u6027\u80fd3\u500d\u5de6\u53f3\u7684\u5dee\u8ddd\u3002\u5bf9\u4e8e\u66f4\u5927\u7684\u6570\u636e\u91cf\uff0c\u53ef\u80fd\u4f1a\u6709\u66f4\u5927\u7684\u6027\u80fd\u5dee\u8ddd\u3002SQL\u5982\u4e0b\uff1a
\nselect count(*) from salaries s left join employees e on s.emp_no=e.emp_no where s.from_date between ‘1999-01-01’ and ‘1999-12-31’ ;
\n\"MySQL
\n\u65e0\u91c7\u7528\u5206\u533a \u91c7\u7528\u5206\u533a
\n3.4 \u5220\u9664\u67e5\u8be2
\n\u4e3a\u4e86\u5220\u96641998\u5e74\u7684\u9500\u552e\u6570\u636e\uff0c\u90a3\u4e48\u5728\u6709\u5206\u533a\u60c5\u51b5\u4e0b\u53ef\u4ee5\u4e0d\u5229\u7528delete\u67e5\u8be2\u5feb\u901f\u5730\u5b8c\u6210\u5783\u573e\u6570\u636e\u7684\u6e05\u7406\u3002
\n\"MySQL
\n\u53ef\u77e5\uff0c\u5bf9\u4e8e\u6709\u5206\u533a\u7684\u60c5\u51b5\u4e0b\uff0c\u53ea\u9700\u8981\u5c06\u67d0\u4e2a\u5206\u533a\u5220\u9664\u6389\u5373\u53ef\uff0c\u65f6\u95f4\u4ec5\u4e3a0.05s\uff0c\u76f8\u5bf9\u5e94\u539f\u6765\u76842.82s\uff0c\u8fd9\u4e2a\u63d0\u5347\u662f\u975e\u5e38\u9ad8\u7684\u3002\u3000\u3000\u3000\u3000\u5f53\u7136\uff0c\u5229\u7528\u5206\u533a\u529f\u80fd\u7684\u6570\u636e\u5220\u9664\u4e4b\u540e\uff0c\u6570\u636e\u6587\u4ef6\u5982\u4e0b\uff1a
\n\"MySQL
\n\u90a3\u4e48\u63a5\u4e0b\u6765\u5982\u679c\u63a5\u7740\u63d2\u51651998\u5e74\u7684\u6570\u636e\uff0c\u6570\u636e\u662f\u5426\u4e22\u5931\u4e86\u5462\uff1f\u8fd8\u662f\u4f1a\u5199\u4e0d\u8fdb\u53bb\uff1f\u7b54\u6848\u4e5f\u90fd\u662f\u5426\u5b9a\uff0c\u5b83\u4f1a\u5c06\u6570\u636e\u5199\u5165p16\u5206\u533a\u4e2d\u3002\u6709\u5174\u8da3\u7684\u8bfb\u8005\u53ef\u4ee5\u81ea\u5df1\u6536\u5230\u8bd5\u8bd5\u3002
\n4. \u603b\u7ed3\u548c\u4e0d\u8db3
\n\u6240\u4ee5\uff0c\u5206\u533a\u7684\u597d\u5904\u6709\u5f88\u591a\uff1a
\n1. \u4e0e\u5355\u4e2a\u78c1\u76d8\u6216\u6587\u4ef6\u7cfb\u7edf\u5206\u533a\u76f8\u6bd4\uff0c\u53ef\u4ee5\u5b58\u50a8\u66f4\u591a\u7684\u6570\u636e
\n2. \u5bf9\u4e8e\u90a3\u4e9b\u5df2\u7ecf\u5931\u53bb\u4fdd\u5b58\u610f\u4e49\u7684\u6570\u636e\uff0c\u901a\u5e38\u53ef\u4ee5\u901a\u8fc7\u5220\u9664\u4e0e\u90a3\u4e9b\u6570\u636e\u6709\u5173\u7684\u5206\u533a\uff0c\u5f88\u5bb9\u6613\u5730\u5220\u9664\u90a3\u4e9b\u6570\u636e\u3002
\n3. \u4e00\u4e9b\u67e5\u8be2\u53ef\u4ee5\u5f97\u5230\u6781\u5927\u7684\u4f18\u5316,\u5982where\u8bed\u53e5\u6570\u636e\u53ef\u4ee5\u53ea\u4fdd\u5b58\u5728\u4e00\u4e2a\u6216\u591a\u4e2a\u5206\u533a\u5185
\n4. \u6d89\u53ca\u5230\u4f8b\u5982SUM() \u548c COUNT()\u8fd9\u6837\u805a\u5408\u51fd\u6570\u7684\u67e5\u8be2\uff0c\u53ef\u4ee5\u5f88\u5bb9\u6613\u5730\u8fdb\u884c\u5e76\u884c\u5904\u7406
\n5. \u901a\u8fc7\u8de8\u591a\u4e2a\u78c1\u76d8\u6765\u5206\u6563\u6570\u636e\u67e5\u8be2\uff0c\u6765\u83b7\u5f97\u66f4\u5927\u7684\u67e5\u8be2\u541e\u5410\u91cf
\n\u5728\u8bbe\u8ba1\u5206\u533a\u8fc7\u7a0b\u4e2d\uff0c\u9700\u8981\u8003\u8651\u7684\u56e0\u7d20\u6709\u5f88\u591a\uff0c\u5982\uff1a
\n\u2013 \u5206\u533a\u7684\u5217
\n\u2013 \u5206\u533a\u4f7f\u7528\u7684\u51fd\u6570\uff0c\u7279\u522b\u4e3a\u975eInteger\u7c7b\u578b\u7684\u5217
\n\u2013 \u670d\u52a1\u5668\u6027\u80fd
\n\u2013 \u5185\u5b58\u5927\u5c0f
\n\u6839\u636e\u5206\u533a\u6280\u672f\uff0c\u6709\u4e00\u4e9b\u6280\u5de7\uff1a
\n\u2013 \u82e5\u7d22\u5f15\u7684\u5927\u5c0f > RAM\uff0c\u8003\u8651\u9009\u7528\u5206\u533a\uff0c\u4e0d\u91c7\u7528\u7d22\u5f15
\n\u2013 \u5c3d\u91cf\u4e0d\u91c7\u7528Primary Key\u505a\u5206\u533a\u7684key
\n\u2013 \u5f53CPU\u6027\u80fd\u9ad8\u7684\u65f6\u5019\uff0c\u8003\u8651\u4f7f\u7528Archive\u5b58\u50a8\u5f15\u64ce
\n\u2013 \u5bf9\u4e8e\u5927\u91cf\u7684\u5386\u53f2\u6570\u636e\uff0c\u8003\u8651\u4f7f\u7528Archive+PARTITION
\n\u2013\u603b\u4e4b\uff0c
\nMySQL\u5206\u533a\u6280\u672f\u662f\u4e00\u79cd\u903b\u8f91\u7684\u6c34\u5e73\u5206\u8868\u6280\u672f\uff1b
\n\u5b83\u53ea\u8bbf\u95ee\u9700\u8981\u8bbf\u95ee\u7684\u5206\u533a\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\uff1b
\n\u652f\u6301range, hash, key, list\u548c\u590d\u5408\u5206\u533a\u65b9\u6cd5\uff1b
\n\u652f\u6301MySQL\u670d\u52a1\u5668\u6240\u652f\u6301\u7684\u4efb\u4f55\u5b58\u50a8\u5f15\u64ce\uff1b
\n\u9664\u4e86Key\u5206\u533a\u65b9\u6cd5\uff0cPartition\u7684key \u5fc5\u987b\u662f\u6574\u6570(\u6216\u8005\u80fd\u8f6c\u5316\u6210\u6574\u6570)\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

3.3 \u8fde\u63a5\u67e5\u8be2 \u540c\u6837\u5730\uff0c\u5bf9\u4e8e\u8fde\u63a5\u67e5\u8be2\uff0c\u5728\u6709\u6ca1\u6709\u5206\u533a\u7684\u6761\u4ef6\u4e0b\uff0c\u5c06\u6709\u6027\u80fd3\u500d\u5de6\u53f3\u7684 … \u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[24],"class_list":["post-346","post","type-post","status-publish","format-standard","hentry","category-xxbj","tag-mysql"],"_links":{"self":[{"href":"https:\/\/www.cnmiss.cn\/index.php?rest_route=\/wp\/v2\/posts\/346","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cnmiss.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cnmiss.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cnmiss.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cnmiss.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=346"}],"version-history":[{"count":0,"href":"https:\/\/www.cnmiss.cn\/index.php?rest_route=\/wp\/v2\/posts\/346\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.cnmiss.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cnmiss.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cnmiss.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}