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mysql -u root -p vmware mysql>use mysql;
mysql>update user set host = '%' where user = 'root';
mysql>select host, user from user;
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GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
FLUSH   PRIVILEGES;
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GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'192.168.1.3' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
FLUSH   PRIVILEGES;
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GRANT ALL PRIVILEGES ON dk.* TO 'myuser'@'192.168.1.3' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
FLUSH   PRIVILEGES;
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1¡¢d:\mysql\bin\>mysql   -h   localhost   -u   root  //ÕâÑùÓ¦¸Ã¿ÉÒÔ½øÈëMySQL·þÎñÆ÷
2¡¢mysql>GRANT   ALL   PRIVILEGES   ON   *.*   TO   'root'@'%'   WITH   GRANT   OPTION  //¸³ÓèÈκÎÖ÷»ú·ÃÎÊÊý¾ÝµÄȨÏÞ
3¡¢mysql>FLUSH   PRIVILEGES  //ÐÞ¸ÄÉúЧ
4¡¢mysql>EXIT  //Í˳öMySQL·þÎñÆ÷
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MySQL COUNT SUM

 select
count(*) as mcount ,
left(create_time,10) as ptime ,
count(if(receive_msg is null,id,null)) as nullcount ,
count(if(receive_msg = '1',receive_msg,null)) as apfcount ,
count(if(receive_msg = '2',receive_msg,null)) as dttcount ,
count(if(receive_msg = '3',receive_ms ......
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