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Development Tools Database Foundations SQL Calculating, Aggregating and Other Functions String Functions

Posted by Junichi Shibatani
Junichi Shibatani
651 Points

CONCAT question

QUESTION: Select the "first_name" followed by the username in parentheses and alias it as "display_name". For example "Andrew (chalkers)". There's a space between the end of the first_name and username in parentheses. MY ANSWER: SELECT CONCAT(first_name, ” (“, LOWER(username), “)”) AS display_name FROM users;

It comes back with a comment “SQL Error: Incorrect parameters in the call to native function 'CONCAT'.”

I want to know what's wrong with my answer here. I have tried several....many options, but they all came back with an error.

Thank you for your help!

1 Answer

Chase Marchione
Chase Marchione
155,055 Points
Chase Marchione
Chase Marchione
155,055 Points

Hi Junichi,

We won't need to lowercase the username. Also, we want to concatenate an empty space before that open parenthesis, to give a little room between the first_name and the display_name in our results.

SELECT CONCAT(first_name, " ", "(", username, ")") AS display_name FROM users;

Hope this helps!