{"rsdb":{"rid":"157247","subhead":"","postdate":"0","aid":"117965","fid":"57","uid":"1","topic":"1","content":"

\u4e00\u3001\u7406\u89e3MySQL\u57fa\u672c\u6982\u5ff5<\/span><\/p>

\u3000\u30001\u3001MySQL\u8f6f\u4ef6<\/span>\uff1aMySQL\u5b9e\u9645\u4e0a\u5c31\u662f\u4e00\u8f6f\u4ef6\uff0c\u662f\u4e00\u5de5\u5177\uff0c\u662f\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u8f6f\u4ef6<\/span><\/span><\/p>

\u3000\u30002\u3001MySQL\u6570\u636e\u5e93<\/span>\uff1a\u5c31\u662f\u6309\u7167\u6570\u636e\u7ed3\u6784\u6765\u7ec4\u7ec7\u3001\u5b58\u50a8\u548c\u7ba1\u7406\u6570\u636e\u7684\u4ed3\u5e93<\/span><\/p>

\u3000\u30003\u3001MySQL\u6570\u636e\u5e93\u5b9e\u4f8b<\/span>\uff1a<\/span><\/p>

\u3000\u3000\u3000\u3000\u2461MySQL\u5b9e\u4f8b\u662f\u7ebf\u7a0b\u548c\u5185\u5b58\u7ec4\u6210<\/span>\uff0c\u5b9e\u4f8b\u624d\u662f\u771f\u6b63\u7528\u4e8e\u64cd\u4f5c\u6570\u636e\u5e93\u6587\u4ef6\u7684\uff1b<\/span><\/p>

\u3000\u3000<\/span>\u4e00\u822c\u60c5\u51b5\u4e0b<\/span>\u4e00\u4e2a\u5b9e\u4f8b\u64cd\u4f5c\u4e00\u4e2a\u6216\u591a\u4e2a\u6570\u636e\u5e93\uff1b\u96c6\u7fa4\u60c5\u51b5\u4e0b<\/span>\u591a\u4e2a\u5b9e\u4f8b\u64cd\u4f5c\u4e00\u4e2a\u6216\u591a\u4e2a\u6570\u636e\u5e93\u3002<\/span><\/p>

\u4e8c\u3001MySQL\u6570\u636e\u5e93\u542f\u52a8\u4ee5\u53ca\u542f\u52a8\u7684\u5224\u65ad<\/span><\/p>

\u3000\u30001\u3001\u542f\u52a8MySQL\u6570\u636e\u5b9e\u4f8b\uff1a<\/span><\/p>

\u3000\u3000\u3000\u3000shell> service mysqld start<\/span>\u3000\u3000#rpm\u5305\u5b89\u88c5\u7684mysql<\/span><\/p>

\u3000\u3000\u5982\u679c\u662f\u6e90\u7801\u5b89\u88c5\u7684\u8bdd\uff0c\u63a8\u8350\u4f7f\u7528mysqld_safe\u547d\u4ee4\u7684\u5b89\u5168\u542f\u52a8(\u53ef\u4ee5\u770b\u5230\u542f\u52a8\u4fe1\u606f)\u3002<\/span><\/span><\/p>

\u3000\u30002\u3001\u5224\u65adMySQL\u6570\u636e\u5e93\u662f\u5426\u542f\u52a8\uff1a<\/span><\/p>

\u3000\u3000\u3000\u3000shell> netstat -tulnp|grep 3306<\/span>\u3000\u3000#\u5982\u679c\u53ef\u4ee5\u8fc7\u6ee4\u51fa\u6765(\u6709\u8f93\u51fa)\u8bc1\u660e\u5df2\u542f\u52a8<\/span><\/p>

\u3000\u3000\u3000\u3000shell> mysqladmin -uroot -p123 ping<\/span>\u3000\u3000#\u51fa\u73b0mysqld is alive\u8bc1\u660e\u662f\u6d3b\u8dc3\u7684<\/span><\/p>

\u4e09\u3001\u5982\u4f55\u4f7f\u7528\u5b98\u65b9\u6587\u6863\u548chelp<\/span><\/p>

\u3000\u30001\u3001\u57fa\u672c\u6280\u80fd\uff1aDBA\u6240\u6709\u7684\u64cd\u4f5c\u5fc5\u987b\u6765\u81ea\u4e8e\u5b98\u65b9\u6587\u6863<\/span><\/span><\/p>

\u3000\u30002\u3001mysql> help contents;<\/span>\u3000\u3000#\u5bfb\u6c42help\u5e2e\u52a9\u7684\u5165\u53e3<\/span><\/p>

\u56db\u3001\u5b98\u65b9\u6587\u6863\u6982\u89c8<\/span><\/p>

\u3000\u30001\u3001Tutorial\uff1a\u5c06MySQL\u5e38\u7528\u7684\u4e00\u4e9b\u64cd\u4f5c\u4f7f\u7528\u4e00\u4e2a\u573a\u666f\u4e32\u8054\u8d77\u6765<\/span><\/p>

\u3000\u3000\u3000\u3000\u53ea\u662f\u5173\u6ce8\u91cc\u9762\u7684\u7070\u8272\u90e8\u5206\u5c31\u53ef\u4ee5\uff0c\u6309\u7167\u91cc\u9762\u7684\u7070\u8272\u64cd\u4f5c\u90e8\u5206\u987a\u4e00\u904d<\/span><\/p>

\u3000\u30002\u3001server Administrator\uff1aMySQL\u7ba1\u7406\u9700\u8981\u7684\u4e00\u4e9b\u547d\u4ee4\u3001\u5de5\u5177\u3001\u53c2\u6570\u7b49<\/span><\/p>

\u3000\u30003\u3001SQL Syntax<\/span><\/span><\/p>

\u3000\u3000\u3000\u3000SQL\u8bed\u6cd5\uff0c\u4f7f\u7528\u6700\u591a\uff0c\u7279\u522b\u662fDDL\u8bed\u53e5\u4e00\u5b9a\u8981\u4f7f\u7528SQL\u8bed\u6cd5\u8fdb\u884c\u53c2\u8003<\/span><\/p>

\u3000\u30004\u3001Server Option \/ Variable Reference\uff1aMySQL\u7684\u53c2\u6570\u548c\u72b6\u6001\u503c\uff0c\u4f7f\u7528\u8f83\u591a<\/span><\/p>

\u3000\u30005\u3001Functions and Operators<\/span><\/p>

\u3000\u3000\u3000\u3000MySQL\u5e38\u7528\u51fd\u6570\u548c\u64cd\u4f5c\u7b26\uff0c\u4f7f\u7528\u8f83\u591a<\/span><\/p>

\u3000\u30006\u3001Views and Stored Programs<\/span><\/p>

\u3000\u3000\u3000\u3000\u89c6\u56fe\u3001\u5b58\u50a8\u8fc7\u7a0b\u3001\u51fd\u6570\u3001\u89e6\u53d1\u5668\u3001event\u8bed\u6cd5\u53c2\u8003<\/span><\/p>

\u3000\u30007\u3001Optimization\uff1a\u4f18\u5316<\/span><\/span><\/p>

\u3000\u3000\u3000\u3000\u975e\u5e38\u503c\u5f97\u7ec6\u81f4\u7684\u770b\u4e00\u904d\uff0c\u6b64\u7bc7\u6587\u6863\u4e0d\u4ec5\u4ec5\u7528\u6765\u53c2\u8003\uff0c\u66f4\u591a\u7684\u662f\u7528\u6765\u5b66\u4e60\u4f18\u5316\u77e5\u8bc6\uff0c\u7b97\u662fDBA\u8fdb\u9636\u5b9d\u5178<\/span><\/p>

\u3000\u30008\u3001Partitioning<\/span><\/p>

\u3000\u3000\u3000\u3000\u5982\u679c\u662f\u8981\u8fdb\u884c\u8868\u5206\u533a\uff0c\u6b64\u6587\u6863\u662f\u5fc5\u987b\u53c2\u8003\u7684\u8d44\u6599\uff0c\u4e5f\u662f\u552f\u4e00\u53c2\u8003\u7684\u8d44\u6599<\/span><\/p>

\u3000\u30009\u3001Information Schema\u3001Performance Schema<\/span><\/p>

\u3000\u3000\u3000\u3000\u4e2d\u7ea7DBA\u5e38\u7528\u7684\u4e24\u4e2a\u53c2\u8003\u8d44\u6599<\/span><\/p>

\u3000\u300010\u3001Spatial Extensions<\/span><\/p>

\u3000\u3000\u3000\u3000\u5730\u7406\u4f4d\u7f6e\u4fe1\u606f<\/span><\/p>

\u3000\u300011\u3001Replication<\/span><\/p>

\u3000\u3000\u3000\u3000MySQL\u4f7f\u7528\u590d\u5236\u529f\u80fd\uff0c\u5e38\u7528\u7684\u53c2\u8003\u8d44\u6599<\/span><\/p>

\u3000\u300012\u3001Semisynchronous Replication<\/span><\/p>

\u3000\u3000\u3000\u3000\u534a\u540c\u6b65\u590d\u5236\uff0c\u4e2a\u522b\u573a\u5408\u4f1a\u7528\u5230<\/span><\/p>

\u4e94\u3001\u5982\u4f55\u4f7f\u7528\u5b98\u65b9\u6587\u6863<\/span><\/p>

\u3000\u30001\u3001\u53c2\u8003\u5b98\u65b9\u6587\u6863\u4fee\u6539\u5bc6\u7801\u5f3a\u5ea6(\u964d\u4f4e\u5bc6\u7801\u5f3a\u5ea6)\u3001\u4fee\u6539\u5bc6\u7801<\/span><\/p>

\u3000\u3000\u2460\u6539\u5bc6\u7801\u5f3a\u5ea6\uff1a<\/span><\/p>

\u3000\u3000\u3000\u3000mysql> show variables like 'validate_password%';<\/span><\/span><\/p>

\u3000\u3000\u3000\u3000mysql> SET GLOBAL validate_password_policy=0;<\/span><\/span><\/p>

\u3000\u3000\u2461\u4fee\u6539\u5bc6\u7801\uff1aset\u3001alter<\/span><\/p>

\u3000\u30002\u3001\u53c2\u8003\u5b98\u65b9\u6587\u6863\u67e5\u8be2\u5f53\u524d\u6570\u636e\u5e93\u8fde\u63a5\u7684\u6570\u91cf(\u67e5\u8be2\u72b6\u6001\u503cThreads_connected)<\/span><\/p>

\u3000\u3000\u3000\u3000mysql> show status like '%Threads_connected%';<\/span><\/span><\/p>

\u3000\u3000\u3000\u3000\u6ce8\u610f\uff1a<\/span>\u67e5\u770b\u72b6\u6001\u503c\u662fshow status<\/span><\/p>

\u3000\u3000\u3000\u3000\u3000\u3000    \u67e5\u770b\u53d8\u91cf\u503c\u662fshow variables<\/span><\/p>

\u3000\u30003\u3001\u5efa\u7acb\u4e00\u4e2a\u6570\u636e\u5e93\u6307\u5b9a\u5b57\u7b26\u96c6<\/span><\/p>

\u3000\u3000\u3000\u3000mysql> create database test_db character set utf8;<\/span><\/span><\/p>

\u3000\u30004\u3001\u7ed9\u4e00\u4e2a\u8868\u589e\u52a0\u4e00\u4e2a\u5217\uff0c\u8981\u6c42\u8fd9\u4e2a\u5217\u7684\u6570\u636e\u7c7b\u578b\u662f\u5b57\u7b26\u4e32\u3001\u975e\u7a7a\uff08alter\uff09<\/span><\/p>

\u3000\u3000\u3000\u3000ALTER TABLE tbl_name ADD COLUMN col_name varchar(20) not null;<\/span><\/span><\/p>

\u3000\u30005\u3001\u7528\u51fd\u6570\u5c06\u4e24\u4e2a\u5b57\u7b26\u4e32\u4e32\u8054\u8d77\u6765(concat\uff1a\u5408\u5e76\u591a\u4e2a\u5b57\u7b26\u4e32)<\/span><\/p>

\u3000\u3000\u3000\u3000CONCAT()\uff1areturns NULL if any argument is NULL.<\/span><\/span><\/p>

\u3000\u3000\u3000\u3000CONCAT_WS(separator,str1,str2,...)<\/span><\/p>

\u3000\u30006\u3001mysqladmin\u7684\u4f7f\u7528\uff1a\u7c7b\u540c\u4e8eping\u6570\u636e\u5e93\u662f\u5426\u6d3b\u8dc3\u3001\u5173\u95ed\u6570\u636e\u5e93<\/span><\/p>

\u3000\u3000\u3000\u3000shell> mysqladmin -uroot -p123 ping<\/span><\/span><\/p>

\u3000\u3000\u3000\u3000mysqld is alive<\/span><\/span><\/p>

\u3000\u3000\u3000\u3000shell> mysqladmin -uroot -p123 shutdown<\/span><\/span><\/p>

\u3000\u30007\u3001\u5982\u4f55\u542f\u52a8\u6570\u636e\u5e93\uff1amysqld_safe\u547d\u4ee4(\u5207\u8bb0\u6302\u540e\u53f0&\uff0c\u5426\u5219\u5360\u9886\u5f53\u524d\u4f1a\u8bdd\u65e0\u6cd5\u9000\u51fa<\/span>)<\/span><\/p>

\u3000\u3000\u3000\u3000shell> mysqld_safe --defaults-file=\/etc\/my.cnf &<\/span><\/span><\/p>

\u5b98\u65b9\u6587\u6863\u5bf9\u4e8e\u5177\u6709\u4e00\u5b9a\u57fa\u7840\u77e5\u8bc6\u7684\u4eba\u6765\u8bf4\uff0c\u662f\u4e00\u4e2a\u6700\u5408\u9002\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u4f7fDBA\u7684\u64cd\u4f5c\u53d8\u5f97\u6ca1\u6709\u969c\u788d     <\/span><\/p>

\u516d\u3001\u767b\u5f55MySQL\u67e5\u770b\u5f53\u524d\u4f1a\u8bdd\u7684\u72b6\u6001<\/span><\/p>

\u3000\u3000mysql> status<\/span><\/span><\/p>

\u4e03\u3001\u63cf\u8ff0MySQL\u5728Linux\u5e73\u53f0\u4e0b\u7684\u5927\u5c0f\u5199\u3001\u540c\u65f6\u6f14\u793a\u5927\u5c0f\u5199\u7684\u533a\u522b<\/span><\/p>

\u3000\u30001\u3001\u6570\u636e\u5e93\u540d\u3001\u8868\u540d\u3001\u8868\u522b\u540d\u4e25\u683c\u533a\u522b\u5927\u5c0f\u5199<\/span><\/p>

\u3000\u30002\u3001\u5217\u540d\u3001\u5217\u522b\u540d\u5ffd\u7565\u5927\u5c0f\u5199<\/span><\/p>

\u3000\u30003\u3001\u53d8\u91cf\u540d\u4e25\u683c\u533a\u522b\u5927\u5c0f\u5199<\/span><\/p>

\u3000\u30004\u3001MySQL\u5728windows\u4e0b\u5404\u4e2a\u5bf9\u8c61\u90fd\u4e0d\u533a\u522b\u5927\u5c0f\u5199<\/span><\/p>

\u3000\u3000\u2461lower_case_table_names<\/span>\u8868\u793a\u8868\u540d\u6216\u6570\u636e\u5e93\u5b58\u50a8\u662f\u5426\u533a\u522b\u5927\u5c0f\u5199\uff0c\u4e3a\u53ea\u8bfb\u53d8\u91cf\uff0c\u53ef\u4ee5\u5728\u914d\u7f6e\u6587\u4ef6my.cnf\u91cc\u9762\u4fee\u6539\uff1a<\/span><\/p>

\u3000\u3000\u3000\u30000\u8868\u793a\u533a\u5206\u5927\u5c0f\u5199\uff0c\u6309\u7167\u65b0\u5efa\u6570\u636e\u5e93\u7684\u5927\u5c0f\u5199\u5f62\u5f0f\u5b58\u50a8\u663e\u793a\uff1b<\/span><\/p>

\u3000\u3000\u3000\u30001\u8868\u793a\u65e0\u8bba\u65b0\u5efa\u6570\u636e\u5e93\u5927\u5c0f\u5199\u90fd\u4ee5\u5c0f\u5199\u7684\u5f62\u5f0f\u5b58\u50a8\u663e\u793a\u3002<\/span><\/p>

\u516b\u3001MySQL\u7684\u51e0\u79cd\u5e2e\u52a9<\/span><\/p>

\u3000\u30001\u3001shell> mysql --help<\/span><\/span><\/p>

\u3000\u30002\u3001mysql> help show<\/span><\/span><\/p>

\u3000\u3000\u3000\u3000mysql> show create table tel_name<\/span><\/span><\/p>

\u3000\u3000\u3000\u3000mysql> help set<\/span><\/span><\/p>

\u4e5d\u3001MySQL\u7684\u53d8\u91cf\u5982\u4f55\u67e5\u770b\uff0c\u5982\u4f55\u4fee\u6539<\/span><\/p>

\u3000\u30001\u3001\u67e5\u770b\u53d8\u91cf\u7528select<\/span><\/p>

\u3000\u3000\u3000\u3000\u5c40\u90e8\u53d8\u91cf<\/span>select var_name;<\/span><\/p>

\u3000\u3000\u3000\u3000\u7528\u6237\u53d8\u91cf<\/span>select @var_name;<\/span><\/p>

\u3000\u3000\u3000\u3000\u5168\u5c40\u53d8\u91cf<\/span>select @@var_name;<\/span><\/p>

\u3000\u30002\u3001\u4fee\u6539\u53d8\u91cf\u7528set<\/span><\/p>

\u3000\u3000\u2461set session\u8868\u793a\u4fee\u6539\u540e\u5bf9\u672c\u6b21\u4f1a\u8bdd\u751f\u6548<\/span><\/p>

\u3000\u3000\u2462\u5982\u679c\u53d8\u91cf\u662f\u53ea\u8bfb\u53d8\u91cf<\/span>\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539MySQL\u7684\u914d\u7f6e\u6587\u4ef6my.cnf\u6765\u4fee\u6539\u53d8\u91cf\uff0c<\/span>\u5728[mysqld]\u4e0b\u6dfb\u52a0\u4e00\u884c\u6570\u636e\uff1auser_var_name=expr\uff0c\u7136\u540e<\/span>\u91cd\u542f\u6570\u636e\u5e93\u518d\u767b\u5f55\u5373\u53ef\u3002<\/span><\/p>

\u5341\u3001MySQL\u7684\u72b6\u6001\u53c2\u6570\u5982\u4f55\u67e5\u770b\u3001\u5982\u4f55\u53c2\u8003\u9605\u8bfb\u5176\u5185\u5bb9<\/span><\/p>

\u3000\u3000\u5728\u5b98\u65b9\u6587\u6863\u7684Server Option \/ Variable Reference\u90e8\u5206\uff0c\u8fdb\u884c\u53c2\u8003\u67e5\u770bMySQL\u7684\u53c2\u6570\u53d8\u91cf\u4ee5\u53ca\u72b6\u6001\u503c<\/span><\/p>

\"\"<\/span><\/p>

\u3000\u30001\u3001cmd-line\u8868\u793a\u80fd\u5426\u5728mysql\u5b89\u5168\u542f\u52a8(mysqld_safe)\u4e2d\u8fdb\u884c\u53c2\u6570\u8bbe\u7f6e --var_name=\u2026\u2026<\/span><\/span><\/p>

\u3000\u30002\u3001option file\u8868\u793a\u80fd\u5426\u5728mysql\u7684\u53c2\u6570\u6587\u4ef6\u4e2d\u8fdb\u884c\u53c2\u6570\u8bbe\u7f6e<\/span><\/p>

\u3000\u30003\u3001system var\u8868\u793a\u662f\u5426\u662f\u7cfb\u7edf\u53d8\u91cf<\/span><\/p>

\u3000\u30004\u3001status var\u8868\u793a\u662f\u5426\u662f\u72b6\u6001\u53d8\u91cf<\/span><\/p>

\u3000\u30005\u3001var scope\u8868\u793a\u53d8\u91cf\u7684\u8303\u56f4\uff1a\u5168\u5c40global\u3001\u4f1a\u8bddsession<\/span><\/p>

\u3000\u30006\u3001dynamic\u8868\u793a\u662f\u5426\u662f\u52a8\u6001\u53c2\u6570\uff0cyes\u662f\u52a8\u6001\uff0cno\u662f\u9759\u6001<\/span><\/p>

\u5341\u4e00\u3001\u5982\u4f55\u67e5\u770b\u67d0\u4e2a\u6570\u636e\u5e93\u91cc\u9762\u6709\u591a\u5c11\u8868\u3001\u6bcf\u4e00\u4e2a\u8868\u7684\u5217\u7684\u4fe1\u606f<\/span><\/p>

\u3000\u30001\u3001show tables;\u3000\u3000desc tbl_name;<\/span><\/span><\/p>

\u3000\u30002\u3001mysql> select * from information_schema.TABLES<\/span><\/span><\/p>

\u3000\u3000\u3000\u3000\u3000\u3000-> where TABLE_NAME='tbl_name'\\G;<\/span><\/span><\/p>

\u3000\u3000\u2460information_schema\u6570\u636e\u5e93<\/span>\uff1a\u4e5f\u79f0\u4e3a\u6570\u636e\u5b57\u5178\uff0c\u8bb0\u5f55\u4e86\u5404\u6570\u636e\u5e93\u7684\u8868\u3001\u89c6\u56fe\u3001\u7d22\u5f15\u3001\u5b58\u50a8\u8fc7\u7a0b\u3001\u51fd\u6570\u7b49\u4fe1\u606f\u2026\u2026<\/span><\/p>

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