Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Databases Modifying Data with SQL Updating Data in a Database Updating Specific Rows

dvir abuksis
dvir abuksis
1,796 Points

what is the difference between "IS" to "=" sign ?

I did not really understand the difference between "IS" to "=" sign. If someone can explain it to me it will be grate. Thank you.

1 Answer

Steven Parker
Steven Parker
231,184 Points

Just remember "IS" is for NULL.

If you're testing values, you would use the comparison operators, including "=".

But you can't make comparisons using NULL. So you might test if a column IS NULL or IS NOT NULL.

dvir abuksis
dvir abuksis
1,796 Points

Ok now i got it. Thank you.