Update Table 1 memo field with values from table 2 in a one-to-many relationship

Question

I have 2 tables I would like to update one column in table 1 with values from table 2 where id=id. However table 2 has many rows matching table 1 and all rows of table 2 would need to be updated to 1 row in table 1

Table_A

id |  all_names      |
---+-----------------+
1  |AB CD FG HI      |
2  |                 |  

** Table_B **

id | name  |
---+-------+
1  |       |
2  | Jon   | 
2  | Mike   |

After the update Table 1 should look like

    id |  all_names      |
    ---+-----------------+
    1  |AB CD FG HI      |
    2  |Jon Mike         |  

I tried

update a 
set a.all_names = TRIM(a.all_names) + b.name + ' '
from table_a a, table_b b
where a.id = b.id

All I end up getting is an empty all_names in table_a

Any idea?

Answer 1

What I ended up doing

Declare @Crs cursor as select * from Table_B;   //Temp Table 
open @crs;
while fetch @crs do
update Table_A set all_names=ifnull(Table_B,'')+trim(@crs.name)+' ' where 
id=@Crs.id;
end while;
close @crs;

This uses the least of lines and is elegant