Question

I try to set the result of a select in a variable(To show it in my result) but I obtain an error

This is my code :

SELECT 8_Type,SET @var= (select Name from variables where  Ch8_ID  = variables.ID)
FROM TTable ;

and when I change my code like bellow, this is what I want but I need to change the name of the column :

SELECT 8_Type, (select Name from variables where  Ch8_ID  = variables.ID)
FROM TTable ;![enter image description here][1]

I obtain in the column the query like this image.

Answer 1

Provide a column alias for the expression… SELECT expr AS my_name e.g.

SELECT 8_Type
     , (select Name from variables where Ch8_ID = variables.ID) AS my_name
 FROM TTable

MySQL will return “my_name” as the label for the column (in the metadata) for the resultset.

(But it’s not at all clear what your SQL statement is trying to do though.)