遇到个SQL问题,查询单条数据:
希望的结果为:
即俩字段中数据位置需要一一对应(id为几,就对应几号)。
id | name |
---|---|
3,5,4,2,1,6 | 三号,五号,四号,二号,一号,六号 |
但实际的结果为:
俩字段中id和name的位置对应不上
id | name |
---|---|
3,5,4,2,1,6 | 一号,二号,三号,四号,五号,六号 |
具体SQL如下所示:(出问题的位置标红了)
select
m."pointName",
m."equCode",
m."equName",
regexp_substr(m.name, '[^,]+', 1, level) name,
m."itemsState",
regexp_substr(m."itemsState", '[^-]+', 1, level) "itemState",
m."checkPerson",
m."remark"
from
(select
PROJECT_ID "projectId",
check_person "checkPerson",
remark "remark",
items "items",
items_state "itemsState",
(select POINT_NAME from asmis_patrol_point where POINT_ID||'' = p.point_id ||'')"pointName",
(select FACILITY_ID from ASMIS_PURCHASE_RESOURCE_LEDGER where RESOURCE_LEDGER_ID = p.equipment_code) "equCode",
(select FACILITY_NAME from ASMIS_PURCHASE_RESOURCE_LEDGER where RESOURCE_LEDGER_ID = p.equipment_code) "equName" ,
(
SELECT listagg (item_name, ',') WITHIN GROUP (order by item_name) names
FROM asmis_check_item WHERE item_id in
(SELECT REGEXP_SUBSTR(p.items, '[^,]+', 1, LEVEL) FROM DUAL
CONNECT BY REGEXP_SUBSTR(p.items, '[^,]+', 1, LEVEL) IS NOT NULL )
) name
from
ASMIS_TASK_PROJECT p
where
p.TASK_ID = #{taskId}
order by
p.project_id
) m
connect by level <= regexp_count(m.name, ',') + 1
and m."projectId" = prior m."projectId"
and prior dbms_random.value is not null
这sql有点绕,根据实际查询单独理解下填红字部分其实就是下面这个样子
这段SQL就是根据in关键字里面的id去查询对应的name,name虽然查出来了,但name结果却不是按照3,5,4,2,1,6这么排序的,导致列转行后,name和id的位置对应不上,解决方法就是让这段sql查出来的name结果集,根据3,5,4,2,1,6这个顺序排就可以了,所以改一下这段sql中的order by关键字,换成order by INSTR(字符串,排序字段),字符串为in里面的数据
SELECT
listagg (name, ',') WITHIN GROUP (order by name) name
FROM
asmis_check_item
WHERE
item_id in (3,5,4,2,1,6)
修改后为:
SELECT
listagg (name, ',') WITHIN GROUP (order by INSTR(‘3,5,4,2,1,6’,id)) name
FROM
asmis_check_item
WHERE
item_id in (3,5,4,2,1,6)