Question

我想获取具有

状态的员工

'A-->Active'
L-->Inactive
T-->terminated

此状态已在表lookup_table中定义。对于Active和Inactiev状态，没有其他条件，但是对于终止状态，有一个条件是term_date可以在今天和过去7天之间。如何将这些条件加入到一个查询中。我写的查询是： -

For active active inactive simply :-

select emp_no , full_name
from people_table pt,
lookup_table lt
where lookup_table_type='ASGN'
and pt.assignment_id=lt.code
and lookup_code in ('A','I')

For terminated :-

select emp_no , full_name
from people_table pt,
lookup_table
where lookup_table_type='ASGN'
and lookup_code in ('T')
and term_date between sysdate and sysdate-7
and pt.system_person_type='EX_EMP'

如何在不使用union的情况下将这两个查询合并为一个。

Answer 1

select emp_no , full_name
from people_table pt,
lookup_table
where lookup_table_type='ASGN'
and (
lookup_code in ('A','I')
or (
and lookup_code in ('T')
and term_date between sysdate and sysdate-7
and pt.system_person_type='EX_EMP' ) )

但我猜你没有向我们展示完整的代码。

Answer 2

要“合并”，请在您的位置使用OR并获得相同的效果。

像这样：

select emp_no , full_name
from people_table pt,
lookup_table lt on pt.assignment_id=lt.code
where lookup_table_type='ASGN'
  and (
       lookup_code in ('A','I')
       OR
       (lookup_code in ('T')
        and term_date between sysdate and sysdate-7
        and pt.system_person_type='EX_EMP')
      )

合并两个查询而不使用union

2 个答案: