ID ID_ENTITY ID_TICKET C_ENUM VAL2 VAL3
1 680 460910 quack
2 680 460910 65536
3 680 460910 text
4 680 460909 quack
5 680 460909 65536
6 680 460909 text
7 680 460908 quack
8 680 460908 65535
9 680 460908 text
我有 SQL 来获取 "ID_TICKET"
,其中 "C_ENUM"= 'quack'
:
select "ID_TICKET"
from "T_TICKET_TYPE_ENTITY_VALUE"
where "ID_ENTITY" = 680 and "C_ENUM" = 'quack'
但我需要获取所有 "ID_TICKET"
,其中 "C_ENUM"= 'quack'
并且,例如,VAL2 = 65536
。
像这样:
select "ID_TICKET"
from "T_TICKET_TYPE_ENTITY_VALUE"
where "ID_ENTITY" = 680 and "C_ENUM" = 'quack' and "VAL2" = 65536
我该怎么做?
我正在尝试执行的完整查询:
select t."ID"
from "T_TICKET" t
join "T_TICKET_TYPE_ENTITY_VALUE" entv on entv."ID_TICKET" = t."ID"
join "T_TICKET_TYPE_ENTITY" ent on ent."ID" = entv."ID_ENTITY"
where t."ID_STATUS" != 13 and ent."ID_TICKET_TYPE" = 462
and entv."C_ENUM" = 'quack'
最佳答案
一种方法是使用 EXISTS:前两个条件是选择你想要的 id,最后一个是提取所有 ID_TICKETs):
SELECT *
from "T_TICKET_TYPE_ENTITY_VALUE" A
WHERE EXISTS (SELECT 1
FROM "T_TICKET_TYPE_ENTITY_VALUE" B
WHERE B."ID_ENTITY" = 680 and B."C_ENUM" = 'quack'
AND A."ID_TICKET"=B."ID_TICKET");
输出:
ID_TICKET ID_ENTITY C_ENUM
1 680 quack
2 200 quick
3 680 quack
示例数据:
INSERT INTO "T_TICKET_TYPE_ENTITY_VALUE" VALUES (1,680,'quack');
INSERT INTO "T_TICKET_TYPE_ENTITY_VALUE" VALUES (1,200,'quick');
INSERT INTO "T_TICKET_TYPE_ENTITY_VALUE" VALUES (2,600,'quack');
INSERT INTO "T_TICKET_TYPE_ENTITY_VALUE" VALUES (3,680,'quack');
您的完整查询应该是:
select t."ID"
from "T_TICKET" t
join "T_TICKET_TYPE_ENTITY_VALUE" entv on entv."ID_TICKET" = t."ID"
join "T_TICKET_TYPE_ENTITY" ent on ent."ID" = entv."ID_ENTITY"
where t."ID_STATUS" != 13 and ent."ID_TICKET_TYPE" = 462
AND EXISTS (SELECT 1
from "T_TICKET_TYPE_ENTITY_VALUE" B
where B."C_ENUM" = 'quack' AND entv."ID_TICKET"=B."ID_TICKET")
关于sql - 通过行中的不同列值从数据库中选择,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46687590/