×
INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Informix SQL Update using an inner join

thread404-1759805

Informix SQL Update using an inner join

Informix SQL Update using an inner join

(OP)
I have a need to update 270,000 records with a particular flag. Using temporary tables and multiple update queries I have creating a staging table to put the original value and the new value. So the table structure is like this:

CODE --> Structure

ID      ORIG_VALUE     NEW_VALUE
1223    A              B
1234    D              A
1334    ...
I'm struggling with creating an efficient UPDATE query that will update these records in mass.

In MS SQL I have used an INNER JOIN to accomplish this, but it seems that Informix doesn't support that. Right now I'm structuring the query like this:

CODE --> SQL

UPDATE TABLEA
SET prod_field = (
  SELECT new_field
  FROM TABLEB_STAGING
  WHERE TABLEA.id = TABLEB_STAGING.id)

Is there a better way to accomplish this?

Thank you for any guidance!

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login
Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close