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  a. show tables»òshow tables from database_name; // ÏÔʾµ±Ç°Êý¾Ý¿âÖÐËùÓбíµÄÃû³Æ
  b. show databases; // ÏÔʾmysqlÖÐËùÓÐÊý¾Ý¿âµÄÃû³Æ
  c. show columns from table_name from database_name; »òshow columns from database_name.table_name;  // ÏÔʾ±íÖÐÁÐÃû³Æ
  d. show grants for user_name;  //  ÏÔʾһ¸öÓû§µÄȨÏÞ£¬ÏÔʾ½á¹ûÀàËÆÓÚgrant ÃüÁî
  e. show index from table_name;  // ÏÔʾ±íµÄË÷Òý
  f. show status;  // ÏÔÊ¾Ò»Ð©ÏµÍ³ÌØ¶¨×ÊÔ´µÄÐÅÏ¢£¬ÀýÈ磬ÕýÔÚÔËÐеÄÏß³ÌÊýÁ¿
  g. show variables; // ÏÔʾϵͳ±äÁ¿µÄÃû³ÆºÍÖµ
  
  h. show  processlist; // ÏÔʾϵͳÖÐÕýÔÚÔËÐеÄËùÓнø³Ì£¬Ò²¾ÍÊǵ±Ç°ÕýÔÚÖ´ÐеIJéѯ¡£´ó¶àÊýÓû§¿ÉÒԲ鿴
                                 ËûÃÇ×Ô¼ºµÄ½ø³Ì£¬µ«ÊÇÈç¹ûËûÃÇÓµÓÐprocessȨÏÞ£¬¾Í¿ÉÒԲ鿴ËùÓÐÈ˵Ľø³Ì£¬°üÀ¨ÃÜÂë¡£
  i. show table status; // ÏÔʾµ±Ç°Ê¹ÓûòÕßÖ¸¶¨µÄdatabaseÖеÄÿ¸ö±íµÄÐÅÏ¢¡£ÐÅÏ¢°üÀ¨±íÀàÐͺͱíµÄ×îиüÐÂʱ¼ä
  j. show privileges;  // ÏÔʾ·þÎñÆ÷ËùÖ§³ÖµÄ²»Í¬È¨ÏÞ
  k. show create database database_name; // ÏÔʾcreate database Óï¾äÊÇ·ñÄܹ»´´½¨Ö¸¶¨µÄÊý¾Ý¿â
  l. show create table table_name; // ÏÔʾcreate database Óï¾äÊÇ·ñÄܹ»´´½¨Ö¸¶¨µÄÊý¾Ý¿â
  m. show engies;  // ÏÔʾ°²×°ÒÔºó¿ÉÓõĴ洢ÒýÇæºÍĬÈÏÒýÇæ¡£
  n. show innodb status; // ÏÔʾinnoDB´æ´¢ÒýÇæµÄ״̬
  o. show logs; // ÏÔʾBDB´æ´¢ÒýÇæµÄÈÕÖ¾
  p. show warnings; // ÏÔʾ×îºóÒ»¸öÖ´ÐеÄÓï¾äËù²úÉúµÄ´íÎó¡¢¾¯¸æºÍ֪ͨ
  q. show errors; // Ö»ÏÔʾ×îºóÒ»¸öÖ´ÐÐÓï¾äËù²úÉúµÄ´íÎó


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mysql alter Óï¾äÓ÷¨,Ìí¼Ó¡¢Ð޸ġ¢É¾³ý×Ö¶Î

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alter table tabelname add new_field_id int(5) unsigned default 0 not null auto_increment ,add primary key (new_field_id);
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alter table t2 add d timestamp;
alter table infos add ex tinyint not null default '0';
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alter table t2 drop column c;
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cp /usr/sfw/share/mysql/my-medium.cnf /etc/my.cnf
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Mysql µ¼Èë .sqlÎļþÖÐÎÄÂÒÂ룿

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iconv -f UTF-8 xxx.sql
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