Question

以下查询如何在oracle数据库中处理，我在Toad中尝试

Query1 - SELECT T_BASIS_ACCESS_ID FROM ECKERNEL_MCA.T_BASIS_ACCESS WHERE ROLE_ID LIKE 'MCA.GFS.LEAD'
Query2 - SELECT OBJECT_ID, NAME  FROM ECKERNEL_MCA.OV_AREA WHERE END_DATE IS NULL AND OBJECT_ID  IN
         (SELECT DISTINCT REPLACE(REPLACE(REPLACE(ATTRIBUTE_TEXT, '(', '' ),')',''), '''', '') 
         FROM ECKERNEL_MCA.T_BASIS_OBJECT_PARTITION WHERE T_BASIS_ACCESS_ID IN 
         (SELECT T_BASIS_ACCESS_ID FROM ECKERNEL_MCA.T_BASIS_ACCESS WHERE ROLE_ID LIKE 'MCA.GFS.LEAD') )
Query3 - SELECT OBJECT_ID, NAME  FROM ECKERNEL_MCA.OV_AREA WHERE END_DATE IS NULL

Answer 1

试一试。它应该按照您在评论中指明的方式行事。

我想如果Query1从表中返回任何结果，比如如果记录为零，则记录数为1+然后执行Query2 如果（Query1> 0）执行Query2，则执行查询3，否则执行Query3

--Query 1
with Q_1 as
(SELECT T_BASIS_ACCESS_ID FROM ECKERNEL_MCA.T_BASIS_ACCESS WHERE ROLE_ID LIKE 'MCA.GFS.LEAD')

--Query 2
SELECT OBJECT_ID, NAME  FROM ECKERNEL_MCA.OV_AREA WHERE END_DATE IS NULL AND OBJECT_ID  IN
     (SELECT DISTINCT REPLACE(REPLACE(REPLACE(ATTRIBUTE_TEXT, '(', '' ),')',''), '''', '') 
     FROM ECKERNEL_MCA.T_BASIS_OBJECT_PARTITION WHERE T_BASIS_ACCESS_ID IN 
     (SELECT T_BASIS_ACCESS_ID FROM ECKERNEL_MCA.T_BASIS_ACCESS WHERE ROLE_ID LIKE 'MCA.GFS.LEAD') )
--If Query 1 returns anything
WHERE EXISTS (SELECT 1 FROM Q_1)

UNION ALL

--Query 3
SELECT OBJECT_ID, NAME  FROM ECKERNEL_MCA.OV_AREA WHERE END_DATE IS NULL
--If Query 1 returns nothing
WHERE NOT EXISTS (SELECT 1 FROM Q_1)

如果没有oracle查询

1 个答案: