MYSQLµÄһЩС¼Ç
ÏÂÎç¿´ÁËÒ»¶ÎPHP100µÄÊÓÆµ¡£
Ò²ËãÓеãÊÕ»ñ¡£
ÀïÃæµÄÒ»¶Î×ÔдµÄfindallµÄSQLº¯Êý£º
public function findall($table) {
$this->query("SELECT * from $table");
}
ÔÀ´Ö»ÊÇÕâô¼òµ¥£¬¸Õ»¹ÔÚ˼¿¼¡£
ʹÓÃÁËTAB¼üÉÏÃæµÄ¶ÙºÅÀ´ÐÞÊÎMYSQLÀïµÄ×Ö¶ÎÃû£¬È磺
UPDATE tablename SET `fieldname`='values' where `fieldname`='values'
ÒÔǰ¶¼Ã»ÓÐÕâÖÖϰ¹ß£¬Ö±½Ó×Ö¶ÎÃû¶¼²»¼ÓÐÞÊΣ¬¿´À´ÕâÊǸöºÃϰ¹ß¡£
ÍíÉÏ»¹ÒªÔÙ¿´Ò»µã£¬ºÃ¾ÃûÓÐд³ÌÐòÁË£¬ÓÖ¿ªÊ¼Óгɾ͸ÐÁ˺Ǻǡ£
Ïà¹ØÎĵµ£º
Ò»´ÎNginx+PHP+MysqlµÄ²¢·¢²âÊÔ¾Àú
Ò»¡¢Ó²¼þ»·¾³
CPU:4ºËIntel(R) Xeon(R) CPU E5504 @ 2.00GHz
6GÄڴ棬120GÓ²ÅÌ
¶þ¡¢Èí¼þ»·¾³
L ......
±¾ÎÄÌÖÂÛ MySQL µÄ±¸·ÝºÍ»Ö¸´»úÖÆ£¬ÒÔ¼°ÈçºÎά»¤Êý¾Ý±í£¬°üÀ¨×îÖ÷ÒªµÄÁ½ÖÖ±íÀàÐÍ£ºMyISAM ºÍ Innodb£¬ÎÄÖÐÉè¼ÆµÄ MySQL °æ±¾Îª 5.0.22¡£
Ŀǰ MySQL Ö§³ÖµÄÃâ·Ñ±¸·Ý¹¤¾ßÓУºmysqldump¡¢mysqlhotcopy£¬»¹¿ÉÒÔÓà SQL Óï·¨½øÐб¸·Ý£ºBACKUP TABLE »òÕß SELECT INTO OUTFILE£¬ÓÖ»òÕß±¸·Ý¶þ½øÖÆÈÕÖ¾£¨binlog£©£¬»¹¿ÉÒÔÊÇ ......
¼Ù¶¨±ítbl_name¾ßÓÐÒ»¸öPRIMARY KEY»òUNIQUEË÷Òý£¬±¸·ÝÒ»¸öÊý¾Ý±íµÄ¹ý³ÌÈçÏ£º
1¡¢Ëø¶¨Êý¾Ý±í£¬±ÜÃâÔÚ±¸·Ý¹ý³ÌÖУ¬±í±»¸üÐÂ
mysql>LOCK
TABLES READ tbl_name;
¹ØÓÚ±íµÄËø¶¨µÄÏêϸÐÅÏ¢£¬½«ÔÚÏÂÒ»Õ½éÉÜ¡£
2¡¢µ¼³öÊý¾Ý
mysql>SELECT
* INTO OUTFILE ‘tbl_name.bak’ from tbl_name;
3¡¢½âË ......
×î½üʹÓÃrootÓû§±àдÁ˼¸¸ö´æ´¢¹ý³Ì£¬µ«ÊÇʹÓÃÆÕͨÓû§Í¨¹ýJDBCÁ¬½ÓÖ´ÐÐÈ´±¨´í£º
java.lang.NullPointerException......
»ò
java.sql.SQLException: User does not have access to metadata required to determine stored procedure parameter types. If rights can not be granted, configure connection with " ......
¡¡ÍøÉÏÓкܶàµÄÎÄÕ½ÌÔõôÅäÖÃMySQL·þÎñÆ÷£¬µ«¿¼Âǵ½·þÎñÆ÷Ó²¼þÅäÖõIJ»Í¬£¬¾ßÌåÓ¦ÓõIJî±ð£¬ÄÇЩÎÄÕµÄ×ö·¨Ö»ÄÜ×÷Ϊ³õ²½ÉèÖòο¼£¬ÎÒÃÇÐèÒª¸ù¾Ý×Ô¼ºµÄÇé¿ö½øÐÐÅäÖÃÓÅ»¯£¬ºÃµÄ×ö·¨ÊÇMySQL·þÎñÆ÷Îȶ¨ÔËÐÐÁËÒ»¶Îʱ¼äºóÔËÐУ¬¸ù¾Ý·þÎñÆ÷µÄ”״̬”½øÐÐÓÅ»¯¡£
mysql> show global status;
¡¡¡¡¿ÉÒÔÁгöMySQL·þÎ ......