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Databases Modifying Data with SQL Deleting Data From a Database Review and Practice

Posted by Sambath Phum
Sambath Phum
4,089 Points

Database: how to remove more than one actors?

In the exercise for removing data in - Remove actors with the first name "Yuri", "Walter" and "Victor".

My input is:

DELETE FROM actors WHERE name LIKE ("Yuri%" AND "Walter%" AND "Victor%);

Is the the correct format?

3 Answers

Steven Parker
Steven Parker
231,184 Points
Steven Parker
Steven Parker
231,184 Points

You can't combine just terms with AND.

And AND is for requiring all conditions at once, OR is for any one of the conditions.

But you can combine complete expressions:

... name LIKE "Yuri%" OR name LIKE "Walter%" OR name LIKE "Victor%";
Christian Higgins
Christian Higgins
15,758 Points

Would this also delete the actresses named "Victoria"?

Steven Parker
Steven Parker
231,184 Points
Steven Parker
Steven Parker
231,184 Points

It would! So perhaps a better solution would be to include a space between the name and the "%" symbol.

Matthew Wilkes
Matthew Wilkes
4,810 Points
Matthew Wilkes
Matthew Wilkes
4,810 Points

I used the below and this seemed to work for me:

DELETE FROM actors WHERE name IN ("Yuri", "Walter", "Victor")
Steven Parker
Steven Parker
231,184 Points
Steven Parker
Steven Parker
231,184 Points

Sure, but you can't use the wildcard "%" when using the membership operator ("IN"). It only works with "LIKE".
The "IN" operator only works with exact matches.

But as you discovered, wildcards are not needed for this challenge.

Joseph Lander
.a{fill-rule:evenodd;}techdegree seal-36
Joseph Lander
Full Stack JavaScript Techdegree Graduate 27,765 Points

That didn't work for me? Names starting with "Yuri" are still there. Doesn't this mean it is looking for an exact match? It won't be as there is a lastname.

Kate McPherson
Kate McPherson
2,150 Points
Kate McPherson
Kate McPherson
2,150 Points

In case anyone is looking for the same answer that I have been looking for regarding how to leave out the entries like "Yuriko" - you need to leave a space between the text and the % wildcard.

Instead of "Yuri%" it needs to be "Yuri %". You can do the same with Victor to leave out any Victorias.