GROUP BY but get all values from other column

Question

I''ll explain what I need to do on example. First of all, we have a simple table like this one, named table:

id | name ===+===== 1  | foo 1  | bar 1  | foobar 2  | foo 2  | bar 2  | foobar 

Now the query:

SELECT t.* FROM table t GROUP BY t.id 

Will get us result similar to this one:

id | name ===+===== 1  | foo 2  | foo 

But is it possible, to collect all values of name to have result like this?

id | name ===+================= 1  | foo, bar, foobar 2  | foo, bar, foobar 

Answer 1

Using MySQL you can use GROUP_CONCAT(expr)

This function returns a string result with the concatenated non-NULL values from a group. It returns NULL if there are no non-NULL values. The full syntax is as follows:

GROUP_CONCAT([DISTINCT] expr [,expr ...]              [ORDER BY {unsigned_integer | col_name | expr}                  [ASC | DESC] [,col_name ...]]              [SEPARATOR str_val]) 

Something like

SELECT ID, GROUP_CONCAT(name) GroupedName FROM Table1 GROUP BY ID 

SQL Fiddle DEMO