\u6ce8\u610f\uff1a\r\n1\u3001\u56fe\u4e2d\u7684P\u8282\u70b9\u4e3a\u6307\u5411\u5b50\u8282\u70b9\u7684\u6307\u9488\uff0c\u4e8c\u53c9\u67e5\u627e\u6811\u548c\u5e73\u8861\u4e8c\u53c9\u6811\u5185\u4e5f\u6709\uff0c\u53ea\u662f\u56fe\u4e2d\u7701\u7565\u4e86\r\n2\u3001\u56fe\u4e2d\u7684\u6bcf\u4e2a\u8282\u70b9\u90fd\u653e\u4e86\u5f88\u591a\u7684\u952e\u503c\u5bf9\uff0c\u4e00\u4e2a\u8282\u70b9\u4e5f\u79f0\u4e4b\u4e3a\u4e00\u9875\uff0c\u4e00\u9875\u5373\u4e00\u4e2a\u78c1\u76d8\u5757\uff0c\u5728mysql\u4e2d\u6570\u636e\u8bfb\u53d6\u7684\u57fa\u672c\u5355\u4f4d\u90fd\u662f\u9875\uff0c\u5373\u4e00\u6b21io\u8bfb\u53d6\u4e00\u4e2a\u9875\u7684\u6570\u636e\uff0c\u6240\u4ee5\u6211\u4eec\u8fd9\u91cc\u53eb\u505a\u9875\u66f4\u7b26\u5408mysql\u4e2d\u7d22\u5f15\u7684\u5e95\u5c42\u6570\u636e\u7ed3\u6784<\/code><\/pre>\n<\/p>\n
<\/p>\n
\u4ece\u4e0a\u56fe\u53ef\u4ee5\u770b\u51fa\uff0cB\u6811\u76f8\u5bf9\u4e8e\u5e73\u8861\u4e8c\u53c9\u6811\uff0c\u6bcf\u4e2a\u8282\u70b9\u5b58\u50a8\u4e86\u66f4\u591a\u7684\u952e\u503c\u548c\u6570\u636e\uff0c\u5e76\u4e14\u6bcf\u4e2a\u8282\u70b9\u4e5f\u62e5\u6709\u4e86\u66f4\u591a\u7684\u5b50\u8282\u70b9\uff0c\u5b50\u8282\u70b9\u7684\u4e2a\u6570\u4e00\u822c\u79f0\u4e4b\u4e3a\u9636\uff0c\u4e0a\u56fe\u5c31\u662f\u4e09\u9636B\u6811\uff0c\u9ad8\u5ea6\u4e5f\u4f1a\u5f88\u4f4e<\/p>\n
<\/p>\n
<\/p>\n
3\u3001B\u6811\u90fd\u67e5\u627e\u6d41\u7a0b<\/p>\n
<\/p>\n
<\/p>\n
\u5047\u5982\u6211\u4eec\u8981\u67e5\u627eid=28\u7684\u7528\u6237\u4fe1\u606f<\/p>\n
<\/p>\n
<\/p>\n
1\u3001\u5148\u627e\u5230\u6839\u8282\u70b9\u4e5f\u5c31\u662f\u98751\uff0c\u5224\u65ad28\u5728\u952e\u503c17\u548c35\u4e4b\u95f4\uff0c\u6211\u4eec\u90a3\u4e48\u6211\u4eec\u6839\u636e\u98751\u4e2d\u7684\u6307\u9488p2\u627e\u5230\u98753\r\n2\u3001\u5c0628\u548c\u98753\u4e2d\u7684\u952e\u503c\u76f8\u6bd4\u8f83\uff0c28\u572826\u548c30\u4e4b\u95f4\uff0c\u6211\u4eec\u6839\u636e\u98753\u4e2d\u7684\u6307\u9488p2\u627e\u5230\u98758\r\n3\u3001\u5c0628\u548c\u98758\u4e2d\u7684\u952e\u503c\u76f8\u6bd4\u8f83\uff0c\u53d1\u73b0\u6709\u5339\u914d\u7684\u952e\u503c28\uff0c\u952e\u503c28\u5bf9\u5e94\u7684\u7528\u6237\u4fe1\u606f\u4e3a(28,bv)<\/code><\/pre>\n<\/p>\n
<\/p>\n
<\/span>3.5 B+\u6811<\/span><\/h3>\n<\/p>\n
<\/p>\n
![\"\"](\"http:\/\/www.233xianyu.top\/wp-content\/uploads\/2026\/09\/\u7d22\u5f155-1024x653.png\")
<\/p>\n
<\/p>\n
<\/p>\n
B+\u6811\u76f8\u5bf9\u4e0eB\u6811\uff0c\u505a\u4e86\u66f4\u591a\u7684\u4f18\u5316<\/p>\n
<\/p>\n
<\/p>\n
1\u3001B+\u6811\u975e\u53f6\u5b50\u8282\u70b9non-leaf node\u4e0a\u662f\u4e0d\u5b58\u50a8\u6570\u636e\u7684\uff0c\u4ec5\u5b58\u50a8\u952e\uff0c\u800cB\u6811\u7684\u975e\u53f6\u5b50\u8282\u70b9\u4e2d\u4e0d\u4ec5\u5b58\u50a8\u952e\uff0c\u4e5f\u4f1a\u5b58\u50a8\u6570\u636e\u3002B+\u6811\u4e4b\u6240\u4ee5\u8fd9\u4e48\u505a\u7684\u610f\u4e49\u5728\u4e8e\uff1a\u6811\u4e00\u4e2a\u8282\u70b9\u5c31\u662f\u4e00\u4e2a\u9875\uff0c\u800c\u6570\u636e\u5e93\u4e2d\u9875\u7684\u5927\u5c0f\u662f\u56fa\u5b9a\u7684\uff0cinnodb\u5b58\u50a8\u5f15\u64ce\u9ed8\u8ba4\u4e00\u9875\u4e3a16KB\uff0c\u6240\u4ee5\u5728\u9875\u5927\u5c0f\u56fa\u5b9a\u7684\u524d\u63d0\u4e0b\uff0c\u80fd\u5f80\u4e00\u4e2a\u9875\u4e2d\u653e\u5165\u66f4\u591a\u7684\u8282\u70b9\uff0c\u76f8\u5e94\u7684\u6811\u7684\u9636\u6570\uff08\u8282\u70b9\u7684\u5b50\u8282\u70b9\u6811\uff09\u5c31\u4f1a\u66f4\u5927\uff0c\u90a3\u4e48\u6811\u7684\u9ad8\u5ea6\u5fc5\u7136\u66f4\u77ee\u66f4\u80d6\uff0c\u5982\u6b64\u4e00\u6765\u6211\u4eec\u67e5\u627e\u6570\u636e\u8fdb\u884c\u78c1\u76d8\u7684IO\u6b21\u6570\u4f1a\u6709\u518d\u6b21\u51cf\u5c11\uff0c\u6570\u636e\u67e5\u8be2\u7684\u6548\u7387\u4e5f\u4f1a\u66f4\u5feb\u3002\r\n\r\n2\u3001B+\u6811\u7684\u9636\u6570\u662f\u7b49\u4e8e\u952e\u7684\u6570\u91cf\u7684\uff0c\u4f8b\u5982\u4e0a\u56fe\uff0c\u6211\u4eec\u7684B+\u6811\u4e2d\u6bcf\u4e2a\u8282\u70b9\u53ef\u4ee5\u5b58\u50a83\u4e2a\u952e\uff0c3\u5c42B+\u6811\u53ef\u4ee5\u5b58\u50a83*3*3=9\u4e2a\u6570\u636e\u3002\u6240\u4ee5\u5982\u679c\u6211\u4eec\u7684B+\u6811\u4e00\u4e2a\u8282\u70b9\u53ef\u4ee5\u5b58\u50a81000\u4e2a\u952e\u503c\uff0c\u90a3\u4e483\u5c42B+\u6811\u53ef\u4ee5\u5b58\u50a81000*1000*1000=10\u4ebf\u4e2a\u6570\u636e\u3002\u800c\u4e00\u822c\u6839\u8282\u70b9\u662f\u5e38\u9a7b\u5185\u5b58\u7684\uff0c\u6240\u4ee5\u4e00\u822c\u6211\u4eec\u67e5\u627e10\u4ebf\u6570\u636e\uff0c\u53ea\u9700\u89812\u6b21\u78c1\u76d8IO\uff0c\u771f\u662f\u5c4c\u70b8\u5929\u7684\u4e8b\u3002\r\n\r\n3\u3001\u56e0\u4e3aB+\u6811\u7d22\u5f15\u7684\u6240\u6709\u6570\u636e\u5747\u5b58\u50a8\u5728\u53f6\u5b50\u8282\u70b9leaf node\uff0c\u800c\u4e14\u6570\u636e\u662f\u6309\u7167\u987a\u5e8f\u6392\u5217\u7684\u3002\u90a3\u4e48B+\u6811\u4f7f\u5f97\u8303\u56f4\u67e5\u627e\u3001\u6392\u5e8f\u67e5\u627e\u3001\u5206\u7ec4\u67e5\u627e\u4ee5\u53ca\u53bb\u91cd\u67e5\u627e\u53d8\u5f97\u5f02\u5e38\u7b80\u5355\u3002\u800cB\u6811\u56e0\u4e3a\u6570\u636e\u5206\u6563\u5728\u5404\u4e2a\u8282\u70b9\uff0c\u8981\u5b9e\u73b0\u8fd9\u4e00\u70b9\u662f\u5f88\u4e0d\u5bb9\u6613\u7684\u3002\r\n\r\n\u800c\u4e14B+\u6811\u4e2d\u5404\u4e2a\u9875\u4e4b\u95f4\u4e5f\u662f\u901a\u8fc7\u53cc\u5411\u94fe\u8868\u8fde\u63a5\u7684\uff0c\u53f6\u5b50\u8282\u70b9\u4e2d\u7684\u6570\u636e\u662f\u901a\u8fc7\u5355\u5411\u94fe\u8868\u8fde\u63a5\u7684\u3002\u5176\u5b9e\u4e0a\u9762\u7684B\u6811\u6211\u4eec\u4e5f\u53ef\u4ee5\u5bf9\u5404\u4e2a\u8282\u70b9\u52a0\u4e0a\u94fe\u8868\u3002\u5176\u5b9e\u8fd9\u4e9b\u4e0d\u662f\u5b83\u4eec\u4e4b\u524d\u7684\u533a\u522b\uff0c\u662f\u56e0\u4e3a\u5728mysql\u7684innodb\u5b58\u50a8\u5f15\u64ce\u4e2d\uff0c\u7d22\u5f15\u5c31\u662f\u8fd9\u6837\u5b58\u50a8\u7684\u3002\u4e5f\u5c31\u662f\u8bf4\u4e0a\u56fe\u4e2d\u7684B+\u6811\u7d22\u5f15\u5c31\u662finnodb\u4e2dB+\u6811\u7d22\u5f15\u771f\u6b63\u7684\u5b9e\u73b0\u65b9\u5f0f\uff0c\u51c6\u786e\u7684\u8bf4\u5e94\u8be5\u662f\u805a\u96c6\u7d22\u5f15\u3002\r\n\r\n\u901a\u8fc7\u4e0a\u56fe\u53ef\u4ee5\u770b\u5230\uff0c\u5728innodb\u4e2d\uff0c\u6211\u4eec\u901a\u8fc7\u6570\u636e\u9875\u4e4b\u95f4\u901a\u8fc7\u53cc\u5411\u94fe\u8868\u94fe\u63a5\u4ee5\u53ca\u53f6\u5b50\u8282\u70b9\u4e2d\u6570\u636e\u4e4b\u95f4\u901a\u8fc7\u5355\u5411\u94fe\u8868\u8fde\u63a5\u7684\u65b9\u5f0f\u53ef\u4ee5\u627e\u5230\u8868\u4e2d\u7684\u6240\u6709\u6570\u636e<\/code><\/pre>\n<\/p>\n
<\/p>\n
<\/span>\u56db \u805a\u96c6\u7d22\u5f15\u4e0e\u975e\u805a\u96c6\u7d22\u5f15<\/span><\/h2>\n<\/p>\n
<\/p>\n
<\/span>4.1 \u805a\u96c6\u7d22\u5f15<\/span><\/h3>\n<\/p>\n
<\/p>\n
\u805a\u96c6\u7d22\u5f15\u3001\u805a\u7c07\u7d22\u5f15\u3001\u4e3b\u952e\u7d22\u5f15\uff1a\u4ee5\u4e3b\u952e\u5b57\u6bb5\u503c\u4e3akey\u6784\u5efa\u7684B+\u6811\uff0c\u8be5B+\u6811\u90fd\u53f6\u5b50\u8282\u70b9\u653e\u7684\u662f\u4e3b\u952e\u503c\u4e0e\u672c\u884c\u5b8c\u6574\u7684\u8bb0\u5f55<\/p>\n
<\/p>\n
<\/p>\n
\u5373\uff1a\u8868\u4e2d\u7684\u6570\u636e\u90fd\u805a\u96c6\u5728\u53f6\u5b50\u8282\u70b9\uff0c\u6240\u4ee5\u79f0\u4e4b\u4e3a\u805a\u96c6\u7d22\u5f15\r\nselect * from user where id=2;<\/code><\/pre>\n<\/p>\n
<\/p>\n
<\/span>4.2 \u975e\u805a\u96c6\u7d22\u5f15<\/span><\/h3>\n<\/p>\n
<\/p>\n
\u975e\u805a\u96c6\u7d22\u5f15\u3001\u975e\u805a\u7c07\u7d22\u5f15\u3001\u8f85\u52a9\u7d22\u5f15\u3001\u4e8c\u7ea7\u7d22\u5f15\uff1a\u4ee5\u975e\u4e3b\u952e\u5b57\u6bb5\u503c\u4e3akey\u6784\u5efa\u7684B+\u6811\uff0c\u8be5B+\u6811\u90fd\u53f6\u5b50\u8282\u70b9\u5b58\u653e\u7684\u662fkey\u4e0e\u5176\u5bf9\u5e94\u7684\u4e3b\u952e\u5b57\u6bb5\u503c<\/p>\n
<\/p>\n
<\/p>\n
create index yyy on user(name);\r\nselect * from user where name=\"xxx\";<\/code><\/pre>\n<\/p>\n
<\/p>\n
\u6ce8\u610f\uff1a\u4e00\u5f20innodb\u5b58\u50a8\u5f15\u64ce\u8868\u4e2d\u5fc5\u987b\u8981\u6709\u4e14\u53ea\u80fd\u6709\u4e00\u4e2a\u805a\u96c6\u7d22\u5f15\uff0c\u4f46\u662f\u53ef\u4ee5\u591a\u4e2a\u8f85\u52a9\u7d22\u5f15<\/p>\n
<\/p>\n
<\/p>\n
<\/span>\u4e94 \u8986\u76d6\u7d22\u5f15\u3001\u56de\u8868\u64cd\u4f5c<\/span><\/h2>\n<\/p>\n
<\/p>\n
<\/span>5.1 \u56de\u8868\u64cd\u4f5c<\/span><\/h3>\n<\/p>\n
<\/p>\n
\u6982\u5ff5\uff1a\u5728\u547d\u4e2d\u8f85\u52a9\u7d22\u5f15\u7684\u57fa\u7840\u4e0a\uff0c\u5728\u8f85\u52a9\u7d22\u5f15\u7684\u53f6\u5b50\u8282\u70b9\u5e76\u6ca1\u6709\u627e\u5230\u60f3\u8981\u7684\u6570\u636e\uff0c\u9700\u8981\u62ff\u7740\u5bf9\u5e94\u7684\u4e3b\u952e\u5b57\u6bb5\u503c\u53bb\u805a\u96c6\u7d22\u5f15\u91cc\u518d\u627e\u4e00\u4e0b<\/p>\n
<\/p>\n
<\/p>\n
\u4e3b\u952e\u7d22\u5f15--->id\u5b57\u6bb5\r\n\u8f85\u52a9\u7d22\u5f15--->name\u5b57\u6bb5\r\nselect name.age,gender from user where name='egon';<\/code><\/pre>\n<\/p>\n
<\/p>\n
<\/span>5.2 \u8986\u76d6\u7d22\u5f15<\/span><\/h3>\n<\/p>\n
<\/p>\n
\u6982\u5ff5\uff1a\u5728\u547d\u4e2d\u7d22\u5f15\u7684\u57fa\u7840\u4e0a\uff0c\u53ea\u5728\u672c\u7d22\u5f15\u7684\u53f6\u5b50\u8282\u70b9\u5c31\u627e\u5230\u4e86\u6211\u4eec\u60f3\u8981\u7684\u6570\u636e<\/p>\n
<\/p>\n
<\/p>\n
\u4e3b\u952e\u7d22\u5f15--->id\u5b57\u6bb5\r\n\u8f85\u52a9\u7d22\u5f15--->name\u5b57\u6bb5\r\nselect id,name from user where name='egon';<\/code><\/pre>\n<\/p>\n
<\/p>\n
<\/span>\u516d \u7d22\u5f15\u7ba1\u7406<\/span><\/h2>\n<\/p>\n
<\/p>\n
<\/span>6.1 B+\u6811\u7d22\u5f15\u7684\u5206\u7c7b<\/span><\/h3>\n<\/p>\n
<\/p>\n
1\u3001\u805a\u96c6\u7d22\u5f15\uff1a\u5373\u4e3b\u952e\u7d22\u5f15\uff0cprimary key\r\n\u7528\u9014\uff1a\r\n\u52a0\u901f\u67e5\u8be2\r\n\u7ea6\u675f(\u4e0d\u4e3a\u7a7a\uff0c\u4e0d\u80fd\u91cd\u590d)\r\n2\u3001\u552f\u4e00\u7d22\u5f15\uff1aunique\r\n\u7528\u9014\uff1a\r\n\u52a0\u901f\u67e5\u627e\r\n\u7ea6\u675f(\u4e0d\u80fd\u91cd\u590d)\r\n3\u3001\u666e\u901a\u7d22\u5f15index\uff1a\r\n\u7528\u9014\uff1a\r\n\u52a0\u901f\u67e5\u627e\r\n4\u3001\u8054\u5408\u7d22\u5f15\uff1a\r\nprimary key(id,name)\uff1a\u8054\u5408\u4e3b\u952e\u7d22\u5f15\r\nunique(id,name)\uff1a\u8054\u5408\u552f\u4e00\u7d22\u5f15\r\nindex(id,name)\uff1a\u8054\u5408\u666e\u901a\u7d22\u5f15<\/code><\/pre>\n<\/p>\n
<\/p>\n
<\/span>6.2\u521b\u5efa\u4e3b\u952e\u7d22\u5f15<\/span><\/h3>\n<\/p>\n
<\/p>\n
1\u3001\u521b\u5efa\u8868\u540e\u518d\u52a0\u4e3b\u952e\u521b\u5efa\u7d22\u5f15(\u516c\u53f8\u4e0d\u4f1a\u7528)\r\n# \u521b\u5efa\u4e3b\u952e\u7d22\u5f15\r\nalter table student add primary key t1(id);\r\nalter table student drop primary key;\r\n# \u521b\u5efa\u552f\u4e00\u7d22\u5f15\r\nalter table country add unique key uni_name(name);\r\nalter tabke t1 drop index t1; \r\n2\u3001\u521b\u5efa\u666e\u901a\u7d22\u5f15\r\ncreate table t1(\r\n id int primary key auto_increment,\r\n class_name varchar(10) unique,\r\n name varchar(16),\r\n age int\r\n);\r\n\r\ncreate index xxx on t1(name);\r\ndrop index xxx on t1;<\/code><\/pre>\n<\/p>\n
<\/p>\n
<\/span>\u4e03 \u8054\u5408\u7d22\u5f15\u4e0e\u6700\u5de6\u524d\u7f00\u5339\u914d\u539f\u5219<\/span><\/h2>\n<\/p>\n
<\/p>\n
\u5982\u679c\u521b\u5efa\u7684\u7d22\u5f15\u662f\u4e00\u4e2a\u8054\u5408\u7d22\u5f15\u2014\u2014id,name,age\r\ncreate index zz on t1(id,name,age);\r\n\u67e5\u8be2\u6761\u4ef6\u4e2d\u4f1a\u51fa\u73b0\r\nid name age\r\nid name\r\nid age\r\nid\r\n\r\n\u5047\u5982\u8868\u5185\u6709\u8fd9\u56db\u6761\u6570\u636e\r\n1,egon1,18,male,egon@qq.com\r\n2,egon2,28,male,egon@qq.com\r\n3,egon3,38,female,egon@qq.com\r\n4,egon4,48,male,egon@qq.com\r\n5,egon5,58,male,egon@qq.com\r\n\r\n\u6bd4\u8f83\u5927\u5c0f\r\n1,egon1,18\r\n2,egon,28\r\n\u5148\u6bd4\u8f83id\u7684\u5927\u5c0f\uff0c\u5982\u679c\u6ca1\u6bd4\u8f83\u51fa\u6765\u518d\u6bd4\u8f83name\uff0c\u5982\u679c\u4e5f\u6ca1\u6bd4\u8f83\u51fa\u6765\uff0c\u90a3\u4e48\u6700\u540e\u6bd4\u8f83age\r\n\r\n\u4ec0\u4e48\u65f6\u5019\u521b\u5efa\u8054\u5408\u7d22\u5f15\uff1f\r\n\u6761\u4ef6\u4e2d\u9700\u8981\u7528\u5230\u591a\u4e2a\u5b57\u6bb5\uff0c\u5e76\u4e14\u591a\u6b21\u67e5\u8be2\u4e2d\u7684\u591a\u4e2a\u5b57\u6bb5\u90fd\u5305\u542b\u67d0\u4e00\u4e2a\u5b57\u6bb5\r\n\r\n\u9700\u8981\u6ce8\u610f\u7684\u95ee\u9898\uff1a\u91cd\u590d\u5ea6\u4f4e\u4e14\u5360\u7528\u7a7a\u95f4\u8f83\u5c0f\u7684\u5b57\u6bb5\u5e94\u8be5\u5c3d\u91cf\u5f80\u5de6\u653e\uff0c\u8ba9\u5176\u6210\u4e3a\u6700\u5de6\u524d\u7f00\uff0c\u6bd4\u8f83\u7c7b\u578b\u5fc5\u987b\u4fdd\u6301\u4e00\u81f4\uff0c\u4f8b\u5982id=10.\u4e0d\u8981id='10'<\/code><\/pre>\n<\/p>\n
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<\/span>\u516b \u7d22\u5f15\u4e0b\u63a8\u6280\u672f<\/span><\/h2>\n<\/p>\n
<\/p>\n
\u5bf9\u4e8e\u8fde\u7eed\u591a\u4e2aand\u7684\u6761\u4ef6\uff0cmysql\u7684\u4f18\u5316\u5668\u4f1a\u5206\u6790\u51fa\u591a\u6761\u6267\u884c\u65b9\u6848\uff0c\u9009\u53d6\u6700\u4f18\u5f85\u4e00\u79cd\uff0c\u5373\u5148\u627e\u5230\u67d0\u4e00\u4e2a\u6761\u4ef6\u628a\u8303\u56f4\u7f29\u5c0f\r\neg\uff1a\r\nselect count(id) from s1 where name=\"egon\" and email=\"egon3@oldboy\" and gender=\"male\";\r\n\u6839\u636e\u8fd9\u6761\u547d\u4ee4\uff0cinnodb\u5b58\u50a8\u5f15\u64ce\u4f1a\u53bb\u5bfb\u627e\u8fd9\u4e09\u4e2a\u6761\u4ef6\u4e2d\u67e5\u8be2\u6700\u5feb\u7684\u65b9\u6848\uff0c\u4f8b\u5982\u5982\u679cname\u6ca1\u6709\u5efa\u7acb\u7d22\u5f15\uff0c\u90a3\u4e48\u4f1a\u770b\u770bemail\u6709\u6ca1\u6709\u5efa\u7acb\u7d22\u5f15\uff0c\u5982\u679c\u4e5f\u6ca1\u6709\uff0c\u6700\u540e\u4f1a\u53bb\u770b\u770bgender\u6709\u6ca1\u6709\u5efa\u7acb\u7d22\u5f15\r\n\r\n\u603b\u7ed3\uff1a\r\n1\u3001and\u8fde\u63a5\u7684\u591a\u4e2a\u6761\u4ef6\uff0c\u9501\u5b9a\u7684\u662f\u4e00\u4e2a\u5c0f\u8303\u56f4\uff0cmysql\u7684\u4f18\u5316\u5668\u4f1a\u4eceand\u6761\u4ef6\u4e2d\u9009\u53d6\u4e00\u4e2a\u6700\u7cbe\u786e\u7684\u6765\u4f18\u5148\u7f29\u5c0f\u8303\u56f4\r\n2\u3001or\u8fde\u63a5\u7684\u591a\u4e2a\u6761\u4ef6\uff0c\u9501\u5b9a\u7684\u662f\u4e00\u4e2a\u5f88\u5927\u7684\u8303\u56f4\uff0cmysql\u4f18\u5316\u6ca1\u529e\u6cd5\u4e86\uff0c\u53ea\u80fd\u4ece\u5de6\u5230\u53f3\u4f9d\u6b21\u5224\u65ad\u6761\u4ef6<\/code><\/pre>\n<\/p>\n
<\/p>\n
<\/span>\u5b9e\u9a8c\u4e00 \u521b\u5efa\u7d22\u5f15\u6d4b\u8bd5<\/span><\/h2>\n<\/p>\n
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1\u3001\u521b\u5efa\u8868s1<\/p>\n
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<\/p>\n
mysql> create table s1(\r\n -> id int,\r\n -> name varchar(20),\r\n -> gender char(6),\r\n -> email varchar(50),\r\n -> );<\/code><\/pre>\n<\/p>\n
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2\u3001\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0b<\/p>\n
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[root@localhost test]# ls -la\r\n\u603b\u7528\u91cf 4\r\ndrwxr-xr-x. 2 root root 22 9\u6708 3 10:15 .\r\ndr-xr-xr-x. 20 root root 280 8\u6708 12 17:46 ..\r\n-rwxr-xr-x 1 mysql mysql 252 9\u6708 3 10:15 init.sql\r\n\r\n[root@localhost test]# cat init.sql\r\ndelimiter $$\r\ncreate procedure auto_insert1()\r\nBEGIN\r\n declare i int default 1;\r\n while(i<3000000)do\r\n insert into s1 values(i,'egon','male',concat('egon',i,'@oldboy'));\r\n set i=i+1;\r\n select concat('egon',i,'_ok');\r\n end while;\r\nEND$$\r\ndelimiter ;<\/code><\/pre>\n<\/p>\n
<\/p>\n
3\u3001\u5bfc\u5165\u6570\u636e\u5e93\u5e76\u67e5\u770b\u5b58\u50a8\u8fc7\u7a0b\u548c\u8c03\u7528\u5b58\u50a8\u8fc7\u7a0b<\/p>\n
<\/p>\n
<\/p>\n
mysql> source \/test\/init.sql\r\nQuery OK, 0 rows affected (0.05 sec)\r\n\r\nmysql> show create procedure auto_insert1G\r\n*************************** 1. row ***************************\r\n Procedure: auto_insert1\r\n sql_mode: ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION\r\n Create Procedure: CREATE DEFINER=`root`@`localhost` PROCEDURE `auto_insert1`()\r\nBEGIN\r\n declare i int default 1;\r\n while(i<3000000)do\r\n insert into s1 values(i,'egon','male',concat('egon',i,'@oldboy'));\r\n set i=i+1;\r\n select concat('egon',i,'_ok');\r\n end while;\r\nEND\r\ncharacter_set_client: utf8mb4\r\ncollation_connection: utf8mb4_unicode_ci\r\n Database Collation: utf8mb4_unicode_ci\r\n1 row in set (0.00 sec)\r\n\r\nmysql> call auto_insert1();<\/code><\/pre>\n<\/p>\n
<\/p>\n
4\u3001\u67e5\u770bid\u603b\u6570\u662f\u5426\u6b63\u786e\uff0c\u7136\u540e\u5728\u73b0\u5728\u65e0\u7d22\u5f15\u7684\u60c5\u51b5\u4e0b\u67e5\u770bid=33\u7684\u90a3\u4e00\u884c\u8bb0\u5f55\u6240\u7528\u7684\u65f6\u95f4<\/p>\n
<\/p>\n
<\/p>\n
mysql> select count(id) from s1;\r\n+-----------+\r\n| count(id) |\r\n+-----------+\r\n| 2999999 |\r\n+-----------+\r\n1 row in set (0.89 sec)\r\n\r\nmysql> select * from s1 where id=33;\r\n+------+------+--------+---------------+\r\n| id | name | gender | email |\r\n+------+------+--------+---------------+\r\n| 33 | egon | male | egon33@oldboy |\r\n+------+------+--------+---------------+\r\n1 row in set (0.87 sec)<\/code><\/pre>\n<\/p>\n
<\/p>\n
5\u3001\u7528id\u521b\u5efa\u7d22\u5f15\u540e\u67e5\u8be2id=33\u8bb0\u5f55\u7684\u901f\u5ea6<\/p>\n
<\/p>\n
<\/p>\n
mysql> create index xxx on s1(id);\r\nQuery OK, 0 rows affected (2.66 sec)\r\nRecords: 0 Duplicates: 0 Warnings: 0\r\n\r\nmysql> select * from s1 where id=33;\r\n+------+------+--------+---------------+\r\n| id | name | gender | email |\r\n+------+------+--------+---------------+\r\n| 33 | egon | male | egon33@oldboy |\r\n+------+------+--------+---------------+\r\n1 row in set (0.00 sec)<\/code><\/pre>\n<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e00 \u7d22\u5f15\u4ecb\u7ecd 1.1 \u7d22\u5f15\u7684\u6982\u5ff5 \u7d22\u5f15\u662f\u5b58\u50a8\u5f15\u64ce\u4e2d\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u6216\u8005\u8bf4\u6570\u636e\u7684\u7ec4\u7ec7\u65b9\u5f0f\uff0c\u53c8\u79f0\u4e4b\u4e3a\u952ekey\uff0c\u662f\u5b58\u50a8\u5f15\u64ce\u7528\u4e8e\u5feb\u901f\u627e\u5230\u8bb0\u5f55\u7684\u4e00\u79cd\u6570\u636e\u7ed3\u6784 \u8868\u4e2d\u7684\u4e00\u884c\u884c\u6570\u636e\u6309\u7167\u7d22\u5f15\u89c4\u5b9a\u7684\u7ed3\u6784\u7ec4\u7ec7\u6210\u4e86\u4e00\u79cd\u6811\u5f62\u7ed3\u6784\uff0c\u8be5\u6570\u53ebB+\u6811 1.2 \u7d22\u5f15\u7684\u4f5c\u7528 \u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u5e94\u7528\u7cfb\u7edf\u7684\u8bfb\u5199\u6bd4\u4f8b\u572810:1\u5de6\u53f3\uff0c\u800c\u4e14\u63d2\u5165\u64cd\u4f5c\u548c\u4e00\u822c\u7684\u66f4\u65b0\u64cd\u4f5c\u5f88\u5c11\u51fa\u73b0\u6027\u80fd\u95ee\u9898\uff0c\u5728\u751f\u4ea7\u73af\u5883\u4e2d\uff0c\u6211\u4eec\u9047\u5230\u6700\u591a\u7684\u3001\u4e5f\u662f\u6700\u5bb9\u6613\u51fa\u95ee\u9898\u7684\uff0c\u8fd8\u662f\u4e00\u4e9b\u590d\u6742\u7684\u67e5\u8be2\u64cd\u4f5c […]<\/p>\n","protected":false},"author":1,"featured_media":81,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-76","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mysql"],"_links":{"self":[{"href":"https:\/\/www.233xianyu.top\/index.php\/wp-json\/wp\/v2\/posts\/76","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.233xianyu.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.233xianyu.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.233xianyu.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.233xianyu.top\/index.php\/wp-json\/wp\/v2\/comments?post=76"}],"version-history":[{"count":1,"href":"https:\/\/www.233xianyu.top\/index.php\/wp-json\/wp\/v2\/posts\/76\/revisions"}],"predecessor-version":[{"id":82,"href":"https:\/\/www.233xianyu.top\/index.php\/wp-json\/wp\/v2\/posts\/76\/revisions\/82"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.233xianyu.top\/index.php\/wp-json\/wp\/v2\/media\/81"}],"wp:attachment":[{"href":"https:\/\/www.233xianyu.top\/index.php\/wp-json\/wp\/v2\/media?parent=76"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.233xianyu.top\/index.php\/wp-json\/wp\/v2\/categories?post=76"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.233xianyu.top\/index.php\/wp-json\/wp\/v2\/tags?post=76"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}