General Programming Q&A thread! Ask any questions about programming, answer the questions of other users, or post suggestions for future threads.

Don't forget to format your code using the triple backticks or tildes:

Here is my schema:

```sql
CREATE TABLE article_to_warehouse (
  article_id   INTEGER
, warehouse_id INTEGER
)
;
```

How do I add a `UNIQUE` constraint?

As part of a weekly series, these topics are a place for users to casually discuss the things they did — or didn't do — during their weekend. Did you make any plans? Take a trip? Do nothing at all? Tell us about it!

This thread is posted daily, and is intended as a place for more-casual discussion of the coronavirus and questions/updates that may not warrant their own dedicated topics. Tell us about what the situation is like where you live!

Inspired by @moocow1452 original post on donating computer resources towards the cause of researching coronavirus. This new post is to organize the Folding @ Home information to be at the top of the thread for new users who may be interested in donating their resources to the cause.

• Folding @ home: Coronavirus - What we're doing and how you can help in simple terms
• Folding @ Home Download here
• Tildes Team number: 238330
• Folding@Home Passkey registration
• Folding@Home Points information
• Folding@Home Team stats
• Extreme Overclocking team stats details
• Folding@home Active Projects - Where you can look up what your Work Unit is related to
• Folding@home Server Stats - Server Status, Assignment/hour
• Folding@home Client Stats - OS, CPU and TFLOPS count totals

• What's something that you learned/were taught wrong?
• Was this a singular error specific to you or whoever taught it to you, or a widespread misconception held by many?
• When did you realize it was in error?
• What impact, if any, did it have on you?

This thread is posted daily, and is intended as a place for more-casual discussion of the coronavirus and questions/updates that may not warrant their own dedicated topics. Tell us about what the situation is like where you live!