SQL Query to copy from one database to another

jogger · #1 (**permalink**) 02-16-11, 18:47

Both database are on the same server.

Need to copy data

FROM Database1 > users1 > data1 TO Database2 > users2 > data2
ONLY WHEN Database2 > users2 > userid2 <<EQUALS>> Database 1 > users1 > userid1

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I dealt with a similiar query before, but not across databases.

The old query I have is below:

Code:

UPDATE forums_drupal_node, wp_posts SET post_author=forums_drupal_node.uid WHERE forums_drupal_node.nid=wp_posts.ID

r937 · #2 (**permalink**) 02-17-11, 05:11

Code:

UPDATE Database1.users1
INNER
  JOIN Database2.users2
    ON Database2.users2.userid2 = Database1.users1.userid1
   SET Database2.users2.data2 = Database1.users1.data1

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