Cross-Table Delete

Posted on 2004-10-13
Last Modified: 2010-05-18
Simplified situation:  I have a table that I want to delete entries from based on entries in another table:



My query so far:
DELETE FROM Table1 USING Table2 WHERE Table1.user = Table2.user AND = 'something I know';

Not sure if this is the right query, but this is where I am right now.  Currently, it's giving me the error:
ERROR 1066: Not unique table/alias: 'Table2'

However, 'Table2' is unique as far as I can see.. no other tables, or fields are named that.
Question by:Chireru
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
LVL 15

Accepted Solution

jdlambert1 earned 125 total points
ID: 12299794
You need a reference to table 1 in the USING clause so it can join:

DELETE FROM Table1 USING Table1, Table2 WHERE Table1.user = Table2.user AND = 'something I know';
LVL 15

Expert Comment

ID: 12299798
You can also do it this way:

DELETE Table1 FROM Table1, Table2 WHERE Table1.user = Table2.user AND = 'something I know';

Author Comment

ID: 12299849
Yup, that tiny change did it, thanks :)
LVL 15

Expert Comment

ID: 12299877
>tiny change did it
I once spent all day trying to figure out an error, and finally discovered a missing period was the only problem...

Featured Post

Back Up Your Microsoft Windows Server®

Back up all your Microsoft Windows Server – on-premises, in remote locations, in private and hybrid clouds. Your entire Windows Server will be backed up in one easy step with patented, block-level disk imaging. We achieve RTOs (recovery time objectives) as low as 15 seconds.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Password hashing is better than message digests or encryption, and you should be using it instead of message digests or encryption.  Find out why and how in this article, which supplements the original article on PHP Client Registration, Login, Logo…
In this series, we will discuss common questions received as a database Solutions Engineer at Percona. In this role, we speak with a wide array of MySQL and MongoDB users responsible for both extremely large and complex environments to smaller singl…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …

623 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question