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create table clients (id int); insert into clients values (1),(2); create table client_2_data (id int); create table client_1_data (id int, `updated` datetime DEFAULT NULL);
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<?php $ca=$mysqli->query('SELECT * FROM `clients`'); $c=$ca->fetch_assoc(); try { $mysqli->query('ALTER TABLE `client_'.$c['id'].'_data` ADD COLUMN `updated` datetime DEFAULT NULL'); }catch (Exception $e) { echo "Caught for {$c['id']}\n $e"."\n"; } try { $c=$ca->fetch_assoc(); }catch (Exception $e) { echo $e."\n"; }
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