添加字段的格式
ALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name alter_specification [, alter_specification] ...alter_specification: table_option ... | ADD [COLUMN] col_name column_definition [FIRST | AFTER col_name ]
eg.
ALTER TABLE myTbl ADD COLUMN newItem VARCHAR(20) DEFAULT "0" AFTER oldItem;
删除字段的格式
ALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name alter_specification [, alter_specification] ...alter_specification: table_option ... | DROP [COLUMN] col_name
eg.
ALTER TABLE myTbl DROP COLUMN uselessItem;
<p>04级新生名单</p>
<table border="1" width="80%" cellpadding="0">
<tr>
<td width="10%" align="center">Id</td>
<td width="20%" align="center">Name</td>
<td width="10%" align="center">Age</td>
<td width="10%" align="cent ......
注: 从MySQL从服务器的版本不能小于主服务器的版本 实验环境 Master Mysql服务器版本5.1.36,IP:192.168.128.130 Slave Mysql服务器版本5.1.36,IP:192.168.128.132 一. MySQL主服务器配置 1.建立授权用户 用法:grant replication slave on *.* to ‘用户名’@'主机’ identified by ‘密码’; mysql>grant replicatio ......
