如何将值从数据库中的所有表插入一个表

Question

I have problems with the last line of the code:

if(isset($_POST['kolona']))
{
foreach($_POST['kolona'] as $vrednost)
mysql_query("ALTER TABLE tablica ADD $vrednost text NOT NULL");
mysql_query("INSERT INTO tablica ( ".(implode(',',($_POST['kolona']))).") SELECT ".(implode(',',($_POST['kolona'])))." FROM druga");
}            

First query is making columns in table 'tablica' and second query suppose to insert values in that columns from all tables from which are the columns, for now it's just hard coded, it's only from table 'druga', but i don't know how to go through the all tables, not just 'druga'. I tried with a loop and also with implode function but nothing seems to be working. Can anyone help?

Answer 1

You can tackle merging problems like this using the ON DUPLICATE KEY feature:

INSERT INTO target (id, column1, column2)
  SELECT id, column1, column2 FROM source
  ON DUPLICATE KEY UPDATE column1=VALUES(column1), column2=VALUES(column2)

It works well provided you have a PRIMARY KEY column without conflicts between your source and target tables.