php批量修改表结构实例
2018-09-07 15:10
废话不多说，直接上代码
<?php set_time_limit(0); $con = mysql_connect(localhost, root, root); $dbname = db; if ($con) { if (mysql_select_db($dbname, $con)) { $sql = show tables like pre_tb_%; $ret = mysql_query($sql); while($row = mysql_fetch_assoc($ret)){ $info1[] = $row; } foreach ($info1 as $v) { $chidarr1[] = substr($v[Tables_in_multiopen (pre_tb_%)],7);//获取标记号 } foreach ($chidarr1 as $val) { $tabname = stat_adclick_.$val; $sql = alter table $tabname add column c2 int default 0 after p; mysql_query($sql); $sql = alter table $tabname DROP PRIMARY KEY; mysql_query($sql); $sql = alter table $tabname add primary key(c2,p); mysql_query($sql); $sql = alter table $tabname drop index old_index; mysql_query($sql); $sql = create index idx_newincex on $tabname (c2,p); mysql_query($sql); } } } mysql_close($con); ?>
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