sql - Oracle SQL - 非空代码不起作用

Question

我正在尝试检索与项目 ID 关联的金额，但我只需要项目 ID 存在的数据(非空白)

当我在下面输入 SQL 代码时...

SELECT project_id, monetary_amount, journal_line_date 
FROM PS_JRNL_LN 
where project_id is not null
  and journal_line_date BETWEEN to_date ('2020/01/01','yyyy/mm/dd') 
                            AND TO_DATE ('2020/03/04','yyyy/mm/dd')

这个查询有效，但是我的结果中仍然得到空白值

Answer 1

您的查询中没有空值，但在下面添加了空格

 SELECT project_id, monetary_amount, 
  journal_line_date 
  FROM PS_JRNL_LN 
    where ( project_id is not null or
   ( project_id is not 
     null   
    and  LTRIM( RTrim(project_id)) not 
       like '') 
     and 
     journal_line_date BETWEEN 
     to_date ('2020/01/01','yyyy/mm/dd') 
                        AND TO_DATE 
   ('2020/03/04','yyyy/mm/dd')