Comments on: MySQL: how to drop multiple tables using single query

By: Rene

Rene — Tue, 05 Jul 2011 12:25:32 +0000

Hi,

if you can use php try this:

$delete_array = mysql_query(“SHOW TABLE STATUS LIKE ‘x__%’”);
while ($delete = mysql_fetch_array($delete_array)) {
mysql_query(“DROP TABLE ” . $delete['Name']);
}

greetz

Rene

By: deej

deej — Thu, 24 Feb 2011 10:59:48 +0000

If you have shell access try this simple script:

create a ~/.my.cnf with:

[client]
user = dbuserid
password = dbpassword
host = mysql_server

[mysql]
database = dbname

Now create the following shell script:

drop_tables.sh
#!/usr/bin/tcsh

if ($#argv != 1) then
echo “Usage: $0 table_prefix”
echo e.g. $0 wp
exit 1
endif

foreach i ( `mysql -e “show tables like ‘$1_%’” | grep -v Tables_in_ ` )
echo mysql -e “drop table $i”
mysql -e “drop table $i”
end

exit 0

Handy for clearing out joomla and wordpress installs

By: chris

chris — Thu, 29 Apr 2010 11:02:50 +0000

Sometimes you will encounter to drop table many tables with lengthy names and it will be possible to excess the default length of group_concat can return . You can just edit the config file of mysql or make use of the function below to work-around this:
function drop_tables($host , $user , $password , $dbname , $prefix = ”)
{

$con = mysql_connect($host , $user , $password );
if (!$con)
{
die(‘Could not connect: ‘ . mysql_error());
}
$array = array();
$sql = “SELECT table_name
FROM information_schema.TABLES
WHERE TABLE_SCHEMA = ‘$dbname’ “;
if(empty($prefix))
$sql .= “AND TABLE_NAME LIKE ‘%%’”;
else
$sql .= “AND TABLE_NAME LIKE ‘$prefix%’”;

$result = mysql_query($sql,$con) or die( mysql_error());
while($row = mysql_fetch_assoc($result))
{
$array[] = $row['table_name'];
}

$sql = “DROP table “.implode(“,” , $array);

mysql_close($con);

return $sql;

}

By: Daniel

Daniel — Fri, 30 Oct 2009 14:14:27 +0000

Thanks!

Exactly what I needed.