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Databases Reporting with SQL Working with Text Concatenating Text

Geovani Mejia
Geovani Mejia
Data Analysis Techdegree Student 7,856 Points

Need help with this SQL query

Challenge task 1. thank you

In the library database there's a patrons table listing all the users of the library. The columns are id, first_name, last_name, address, email, library_id and zip_code.

Generate a list of strings that are in the following format: Andrew Chalkley andrew@teamtreehouse.com. Concatenate the first name, last name and email address for all users.

Alias it to to_field. This will be used in the "To" field in email marketing.

HERE IS MY ANSWER. I cant figure out. thanks

SELECT first_name || " " || last_name || email FROM patrons;

Olivér Molnár
Olivér Molnár
Data Analysis Techdegree Student 3,762 Points

Hey Geovani,

Many thing are missing from your query:

  1. The email "format" is not correct. Your: andrew@treehouse.com, but the challenge is "<"email">" (between angle brackets).
  2. You have to use "to_field" alias in the email column


  • The correct email format: || "<" || email || ">"
  • Using alias: AS to_field

Part of solution ...first_name || ' ' || last_name || ' ' || "<" || email || ">" AS to_field...

You can to practice in SQL Playground, what is highly recommended, because you can to try anything :)

1 Answer

Steven Parker
Steven Parker
217,602 Points

You're part way there, but you need a few more elements. Take another look at the format: Andrew Chalkley <andrew@teamtreehouse.com>. Note that there is a space and an angle bracket before the email, and a closing angle after it. You'll need to include those in your concatenated string.

Then, remember that the instructions asked you to "Alias it to to_field."

Add these to your query and you'll pass the challenge.