Edmonds Commerce Blog

7 Responses to “MySQL Copy Table from One Database to Another”

1. Julz Says:
   June 12th, 2008 at 11:42 pm

   Just remember that this won't create the table using the same engine as the existing table and it won't recreate the primary keys or indexes.

   To do this you have to use:

   CREATE TABLE new_table_name LIKE old_table_name;

   then you populate it with the data from the old table with:

   INSERT INTO new_table_name SELECT * FROM old_table_name;

   If the copied old table has many keys then it may help to speed the INSERT if you turn off the keys using the following before the INSERT:

   ALTER TABLE new_table_name DISABLE KEYS;

   And then after the INSERT:

   ALTER TABLE new_table_name ENABLE KEYS;

   These two statements are not supported by all MySQL Engine types though. InnoDB being one of them in MySQL ver 5.x

   Cheers
   Julz

2. admin Says:
   June 13th, 2008 at 8:47 am

   Nice one Julz

   Yes if you want to do more than simply backup the table data and want to actually make a proper fully functional copy of the table then the above is definitely the best way to do so.

3. tony Says:
   October 2nd, 2008 at 2:31 pm

   hi, i want to update my table2 with only the new data that i have entered from table1. hopefully on a daily basis

   how wud i go about this? pls help

   tony

4. tony Says:
   October 3rd, 2008 at 7:57 am

   any one? please

5. rigo Says:
   October 12th, 2008 at 7:56 pm

   Very useful tip, thanks to Julz and Admin

6. admin Says:
   November 20th, 2008 at 12:04 pm

   Hi

   I made a little function for this query as per Julz advice

   PLAIN TEXT
   PHP:

   1. function backup_table($table_name, $backup_table_name){
   2.     db_query("CREATE TABLE $backup_table_name LIKE $table_name");
   3.     db_query("ALTER TABLE $backup_table_name DISABLE KEYS");
   4.     db_query("INSERT INTO $backup_table_name SELECT * FROM $table_name");
   5.     db_query("ALTER TABLE $backup_table_name ENABLE KEYS");
   6. }

7. admin Says:
   November 20th, 2008 at 12:05 pm

   note thats using this db_query function

   PLAIN TEXT
   PHP:

   1. function db_query($query){
   2.     $output = mysql_query($query) or die('<h1 style="color: red;">MySQL Error:</h1>Please copy and paste between the lines and email to YOUREMAIL@ADDRESS.COM<br><br>------------------------------------------------------------------------------------<h3>Query:</h3><pre>' . htmlentities($query) . '</pre><h3>MySQL Error:</h3>' . mysql_error() . '<br><br>------------------------------------------------------------------------------------');
   3.     return $output;
   4. }

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