The following example demonstrates what seems to be a bug in group_concat.
With the latest version of CVS:
CREATE TABLE example (id INTEGER, x TEXT);
CREATE TABLE table2 (key TEXT, x TEXT);
CREATE TABLE list (key TEXT, value TEXT);
INSERT INTO example VALUES (1, "a");
INSERT INTO table2 VALUES ("a", "alist");
INSERT INTO table2 VALUES ("b", "blist");
INSERT INTO list VALUES ("a", 1);
INSERT INTO list VALUES ("a", 2);
INSERT INTO list VALUES ("a", 3);
INSERT INTO list VALUES ("b", 4);
INSERT INTO list VALUES ("b", 5);
INSERT INTO list VALUES ("b", 6);
SELECT example.id,
table2.x,
(SELECT group_concat(list.value) FROM list WHERE list.key = table2.key)
FROM example, table2;
Output:
1|alist|1,2,3
1|blist|,4,5,6
I expected:
1|alist|1,2,3
1|blist|4,5,6
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