Question

This is a subset of my table:

first | last | city
Fred  | NULL | LA
Mary  | Jane | Boulder

How do I concatenate every column without specifying the column names? (I have 20 columns in my REAL table but I don’t want to have to type them in). I have:

SELECT CONCAT('first', ',' , 'last' , ',' , 'city') FROM table; # How do I do it without specifying the column names????

desired result:

Fred,NULL,LA
Mary,Jane,Boulder

Answer 1

Short answer: you cannot.

Long answer: you can with INFORMATION_SCHEMA and dynamic sql, but that is a really bad idea.