Question

使用SQL Server 2000

Database1.Table1

ID  Name Date       title    
001 Ravi 23-02-2009 Accountant
001 Ravi 24-02-2009 Accountant
001 Ravi 25-02-2009 Accountant
002 Ram  21-02-2009 Supervisors
002 Ram  25-02-2009 Supervisors
002 Ram  26-02-2009 Supervisors

所以......，

Database2.Table2

ID  Name Date1      Date2    
001 Ravi 23-02-2009 24-02-2009 
002 Ram  21-02-2009 24-02-2009

所以......

假设我要显示从21-02-2009到26-02-2009的记录 - 预期产出：

001 Ravi 25-02-2009 Accountant
002 Ram 25-02-2009 Supervisors
002 Ram 26-02-2009 Supervisors

从上面两个表中我想显示来自Database1.table1的id，name，date，title，其中Database1.table1.id不应该在database2.table2的date1和date2之间显示：

(23-02-2009 to 24-02-2009) ID should not display from table1
(21-02-2009 24-02-2009) ID should not display from table1

如何在SQL中进行查询？

任何人都可以帮助我。

Answer 1

对于Table1中的每一行，我们在Table2中查找行，并仅显示没有Table2匹配的行：



SELECT
  TABLE1.*
FROM TABLE1
LEFT JOIN TABLE2
ON 
  (TABLE1.ID = TABLE2.ID) AND --JOIN TABLE2 BY ID
  (TABLE1.DATE BETWEEN TABLE2.DATE1 AND TABLE2.DATE2) --AND BY DATE CRITERIA
WHERE 
  (TABLE2.ID IS NULL) AND --SHOW ONLY IF IT DIDN'T MATCH ROW IN TABLE2
  (TABLE1.DATE BETWEEN '21-02-2009' AND '26-02-2009')

SELECT TABLE1.* FROM TABLE1 LEFT JOIN TABLE2 ON (TABLE1.ID = TABLE2.ID) AND --JOIN TABLE2 BY ID (TABLE1.DATE BETWEEN TABLE2.DATE1 AND TABLE2.DATE2) --AND BY DATE CRITERIA WHERE (TABLE2.ID IS NULL) AND --SHOW ONLY IF IT DIDN'T MATCH ROW IN TABLE2 (TABLE1.DATE BETWEEN '21-02-2009' AND '26-02-2009')

Answer 2

尝试：

SELECT t.id, 
       t.name, 
       t.date, 
       t.title
  FROM TABLE_1 t
 WHERE NOT EXIST(SELECT NULL
                   FROM TABLE_2 t2
                  WHERE t.date BETWEEN t2.date1 AND t2.date2)

如果您的数据模型将日期存储在字符串中，请更新NOT EXISTS以使用CAST / CONVERT将它们更改为DateTime ...

请注意LEFT JOIN/IS NULL is not as efficient as NOT IN/NOT EXISTS in SQL Server。

Answer 3

我想你正在寻找这个：

select db1.id, db1.name, db1.date, db1.title
from database1.table1 as db1
    join database2.table2 as db2 on db1.id = db2.id
where db1.date < db2.date1
    or db1.date > db2.date2

-don

ID不应该在指定的日期之间显示？

3 个答案: