Question

我有以下查询：

SELECT PersonTotalHours.MA, PersonTotalHours.Year, PersonTotalHours.CalendarWeek,
PersonTotalHours.Hours, Person.Name, Person.Lastname 
FROM PersonTotalHours
INNER JOIN Person
ON PersonTotalHours.MA = Person.MA;

结果如下表所示：

  MA       Year    CalendarWeek    Hours    Name    Lastname
  aA       2000         5           53      aa        AA
  aA       2000         44          175     aa        AA
  ...      ...         ...          ...
  aA       2001         4           226     aa        AA
  aA       2001         12          87      aa        AA
  ...      ...         ...          ...
  bB       2000         1           189     bb        BB
  bB       2000         35          65      bb        BB
  ...      ...         ...          ...

如您所见，某些日历周没有数据。对于现在不存在的那些日历周（1到53）和小时= 0，我有什么方法可以获得一行吗？

修改我通过向表中添加缺少的行来暂时解决这个问题。使用报表打开时调用的函数。仍在寻找一个非愚蠢的解决方案。

Answer 1

创建帮助表Calendar，存储所有可能的值。 RIGHT JOIN它：

SELECT pth.MA, pth.Year, pth.CalendarWeek,
pth.Hours, p.Name, p.Lastname 
FROM PersonTotalHours pth
INNER JOIN Person p
    ON pth.MA = p.MA
RIGHT JOIN Calendar c
    ON pth.Year = c.Year AND pth.CalendarWeek = c.CalendarWeek

（使用表别名来节省一些打字。）

编辑： MS Access查询尝试，版本1：

SELECT pth.MA, pth.Year, pth.CalendarWeek,
pth.Hours, p.Name, p.Lastname 
FROM (PersonTotalHours pth
INNER JOIN Person p
    ON pth.MA = p.MA)
RIGHT JOIN Calendar c
    ON pth.Year = c.Year AND pth.CalendarWeek = c.CalendarWeek

编辑： MS Access查询尝试，版本2：

SELECT pth.MA, pth.Year, pth.CalendarWeek,
pth.Hours, p.Name, p.Lastname 
FROM calendar
    left join (PersonTotalHours pth
               INNER JOIN Person p ON pth.MA = p.MA)
    ON pth.Year = c.Year AND pth.CalendarWeek = c.CalendarWeek

Answer 2

请检查此查询。

select PersonTotalHours.MA,PersonTotalHours.YEAR,b.CalendarWeek, PersonTotalHours.Hours, '' Name, '' LastName from PersonTotalHours
right join (
select '' MA, 0 Year, no CalendarWeek, 0 Hours, '' Name, '' Lastname from (
select row_number() over(order by object_id) no from sys.all_objects
) a where no <= 53) b on b.CalendarWeek = Table_1.CalendarWeek

我没有加入人员表。

显示访问中没有数据的行

2 个答案: