我有一串用逗号分隔的数字,如'7845,6986,2548' 我想拆分逗号并将结果传递给select语句的IN子句 我曾经使用过这个功能:
create or replace TYPE t_in_list_tab as table of varchar2(4000);
create or replace FUNCTION in_list (p_in_list IN VARCHAR2)
RETURN t_in_list_tab
AS
l_tab t_in_list_tab := t_in_list_tab();
l_text VARCHAR2(32767) := p_in_list || ',';
l_idx NUMBER;
BEGIN
LOOP
l_idx := INSTR(l_text, ',');
EXIT WHEN NVL(l_idx, 0) = 0;
l_tab.extend;
l_tab(l_tab.last) := TRIM(SUBSTR(l_text, 1, l_idx - 1));
l_text := SUBSTR(l_text, l_idx + 1);
END LOOP;
RETURN l_tab;
END;
这个函数的返回类型是varchar2,但是我的列类型是数字,我尝试使用TO_NUMBER,如:
select * from my_tbl where col1 IN (TO_NUMBER(select * from table(IN_LIST('7845,6986,2548'))));
但它不起作用, 有什么帮助吗?
答案 0 :(得分:0)
您需要将table collection expression(名为column_value
)中的列放在to_number()
来电中:
select to_number(column_value) from table(IN_LIST('7845,6986,2548')
演示:
with my_tbl(col1, col2) as (
select 7845, 'Test 1' from dual
union all select 2548, 'Test 2' from dual
union all select 9999, 'Test 3' from dual
)
select * from my_tbl where col1 IN (
select to_number(column_value) from table(IN_LIST('7845,6986,2548'))
);
COL1 COL2
---------- ------
7845 Test 1
2548 Test 2
您也可以使用加入:
select my_tbl.*
from
(
select * from table(IN_LIST('7845,6986,2548'))
) tmp
join my_tbl
on my_tbl.col1 = to_number(tmp.column_value);