在MySQL中合并创建的列

Question

I have a MySQL query which returns columns from different tables, as well as a column that I've customized personally through a case statement.

SELECT table.column, 
CASE (...) as new_column 

The thing is, I want to concatenate table.column and new_column in this query, although I can't independently call new_column since I created it in the query.

Due to database privileges, I can't actually create tables on the database.

Thoughts on how I should approach this?

Answer 1

You can just wrap that whole select into a CONCAT() function:

SELECT CONCAT(table.column, CASE(...)) AS new_column
FROM table;

Another way of approaching it, not that I recommend it but it may be a little more readable, is to use your current query as a subquery and concatenate from the parent one:

SELECT CONCAT(column, new_column) AS new_column
FROM(
   SELECT table.column, CASE(...) AS new_column
   FROM table
) tmp;