如果你有10g中,那麼你必須要經過以下功能:
CREATE OR REPLACE FUNCTION get_comma_separated_value (input_val in number)
RETURN VARCHAR2
IS
return_text VARCHAR2(10000) := NULL;
BEGIN
FOR x IN (SELECT col2 FROM table_name WHERE col1 = input_val) LOOP
return_text := return_text || ',' || x.col2 ;
END LOOP;
RETURN LTRIM(return_text, ',');
END;
/
所以,你可以這樣做:
select col1, get_comma_separated_value(col1) from table_name
Fiddle here
如果你有oracle 11g,可以使用listagg:
SELECT
col1,
LISTAGG(col2, ', ') WITHIN GROUP (ORDER BY col2) "names"
FROM table_x
GROUP BY col1
Fiddle here for Listagg
對於MySQL,它會是簡單的:
SELECT col1, GROUP_CONCAT(col2) FROM table_name GROUP BY col1
我已經編輯你的問題,看看代碼模式的線,你可以確認這就是你的意思......哎呀,bluefeet捏造我編輯。 – boisvert
[行列中的列值可能重複](http://stackoverflow.com/questions/9482560/column-values-in-a-row) –
[在Oracle中構建逗號分隔列表值的可能重複SQL語句](http://stackoverflow.com/questions/5822700/building-a-comma-separated-list-of-values-in-an-oracle-sql-statement) – DCookie