SQL Query to get the following output

Select * 开发者_高级运维from table1

col1   col2

AAAA    CE      
BBB     MK     
All     OUT
All     IN
KKK     BA
CCC     NA
KKK     IN

I need output as below:

AAAA : CE
BBB : MK
All : OUT,IN
KKK : BA, IN
CCC : NA

If this is MySQL, you can use GROUP_CONCAT function