Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

ͨ¹ýshow status À´ÓÅ»¯MySQLÊý¾Ý¿â

 
2009Äê10ÔÂ30ÈÕ ÐÇÆÚÎå 22:53
1, ²é¿´MySQL
·þÎñÆ÷ÅäÖÃÐÅÏ¢
mysql> show variables;
mysql> show variables;
2, ²é¿´MySQL·þÎñÆ÷ÔËÐеĸ÷ÖÖ״ֵ̬
mysql> show global status;
mysql> show global status;
3, Âý²éѯ
mysql> show variables like '%slow%';  
+------------------+-------+  
| Variable_name    | Value |  
+------------------+-------+  
| log_slow_queries | OFF   |  
| slow_launch_time | 2     |  
+------------------+-------+  
mysql> show global status like '%slow%';  
+---------------------+-------+  
| Variable_name       | Value |  
+---------------------+-------+  
| Slow_launch_threads | 0     |  
| Slow_queries        | 279   |  
+---------------------+-------+
mysql> show variables like '%slow%';
+------------------+-------+
| Variable_name    | Value |
+------------------+-------+
| log_slow_queries | OFF   |
| slow_launch_time | 2     |
+------------------+-------+
mysql> show global status like '%slow%';
+---------------------+-------+
| Variable_name       | Value |
+---------------------+-------+
| Slow_launch_threads | 0     |
| Slow_queries        | 279   |
+---------------------+-------+
ÅäÖÃÖйرÕÁ˼ǼÂý²éѯ£¨×îºÃÊÇ´ò¿ª£¬·½±ãÓÅ»¯
£©£¬³¬¹ý2Ã뼴ΪÂý²éѯ£¬Ò»¹²ÓÐ279ÌõÂý²éѯ
4, Á¬½ÓÊý
mysql> show variables like 'max_connections';  
+-----------------+-------+  
| Variable_name   | Value |  
+-----------------+-------+  
| max_connections | 500   |  
+-----------------+-------+  
mys


Ïà¹ØÎĵµ£º

MySQL 5.0°²×°Í¼½â

ÏÂÃæµÄÊÇMySQL°²×°µÄͼ½â:¡¡¡¡
Ë«»÷ÔËÐГsetup.exe”£¬³öÏÖÈçϽçÃæ£º 
mysql°²×°Ïòµ¼Æô¶¯£¬°´“Next”¼ÌÐø
Ñ¡Ôñ°²×°ÀàÐÍ£¬ÓГTypical£¨Ä¬ÈÏ£©”¡¢“Complete£¨ÍêÈ«£©”¡¢“Custom£¨Óû§×Ô¶¨Ò壩”Èý¸öÑ¡ÏÎÒÃÇÑ¡Ôñ“Custom”£¬Óиü¶àµÄÑ¡ÏҲ· ......

mysql ÐÞ¸ÄÕʺÅÔ¶³ÌµÇ½ȨÏÞ

GRANT ALL PRIVILEGES
1¡£ ¸Ä±í·¨¡£¿ÉÄÜÊÇÄãµÄÕʺŲ»ÔÊÐí´ÓÔ¶³ÌµÇ½£¬Ö»ÄÜÔÚlocalhost¡£Õâ¸öʱºòÖ»ÒªÔÚlocalhostµÄÄÇ̨µçÄÔ£¬µÇÈëmysqlºó£¬¸ü¸Ä "mysql" Êý¾Ý¿âÀïµÄ "user" ±íÀïµÄ "host" Ï´Ó"localhost"¸Ä³Æ"%"
Sql´úÂë ¸´ÖÆ´úÂë
   1. mysql -u root -pvmwaremysql>use mysql; 
   ......

MySQLµÄ²éѯÓÅ»¯ºÜɵ

select id from message where author_id in (select followed_id from Relation where follower_id=1) order by id desc   ºÍ ·Ö±ðÖ´ÐÐ $userlist = select followed_id from Relation where follower_id=1 ÔÙ select id from message where author_id in ($userlist) order by id desc   ¾¹È»ÓÐÁ½¸öÊýÁ ......

linux ÏÂc++¼°mysql¶Ôʱ¼ä´¦ÀíµÄ³£Óü¼ÇÉ

mysql ½ØÈ¡Ä³Ò»¸öʱ¼ä(datetimeÀàÐÍ)µÄÈÕÆÚ£º
·½·¨1£ºselect date(row_name) from table_name where row = row1;
·½·¨2£ºselect left(row_name, 10) from table_name where row = row1;
·½·¨3£ºselect cast(row_name as char[10]) from table_name where row = row1;
È¡µÃij¸öÈÕÆÚµÄtime_tÊýÖµ£ºselect unix_times ......

Mysql ¶¨Òå×ֶεij¤¶È

 
Mysql Öж¨Òå×ֶκóµÄÊý¾ÝµÄÓô¦£º
int(1)ºÍint(10)ËÆºõûÓÐʲô²î±ð£¬¶¼±íʾ×î´óËĸö×Ö½ÚµÄÕûÐÍÊý¾Ý¡£
ÀýÈ綨ÒåÒ»¸öÃû×ÖΪtestµÄ±í:
DROP TABLE IF EXISTS `test`;
CREATE TABLE `test` (
  `id` int(1) NOT NULL,
  `ids` int(10) default NULL,
  `c` char(1) default NULL,
  `cs` ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ