Question

我需要从两张桌子中占用两张桌子

表1 TableMaster

_______________________________
|TableNo | TableType | Shared |
-------------------------------
|1       | WT        | FULL   |
|2       | WT        | FULL   |
|3       | WT        | SHARED |
|4       | WT        | SHARED |
-------------------------------

表2 TableSharedDetails

______________________________________________
|TableNo | ReservedDate | TableType | Shared |
----------------------------------------------
|4       | 29-12-2016   | WT        | FULL   |
|4       | 30-12-2016   | WT        | FULL   |
----------------------------------------------

我的桌面管理员有完整和共享表格。全表占用率为1，共享表占用率为2，我们将共享表转换为完整表，因为我正在使用表2 TableSharedDetails。

当我们在该日期将表格转换为完整时，我需要增加全表+ 1并减少共享表格 - 1

现在我想要特定时期的表类型明智可用状态，例如（2016年12月28日至2016年12月31日）

输出

______________________________________________
| ReservedDate | TableType | Shared |Totalava|
----------------------------------------------
| 28-12-2016   | WT        | FULL   |  2     |
| 28-12-2016   | WT        | Shared |  2     |
| 29-12-2016   | WT        | FULL   |  3     |
| 29-12-2016   | WT        | Shared |  1     |
| 30-12-2016   | WT        | FULL   |  3     |
| 30-12-2016   | WT        | Shared |  1     |
| 31-12-2016   | WT        | FULL   |  2     |
| 31-12-2016   | WT        | Shared |  2     |
----------------------------------------------

这里Totalava是tablemaster的桌子数

我尝试了一个程序，但这不正确

Create Procedure TableAvaStatus (@StartDate as DateTime, @EndDate as DateTime)
as
declare @AvaStatus table (ReserveDate DateTime, TableType varchar(10), Shared varchar(10), TotalAva int)

While @StartDate < @EndDate
Begin
    INSERT INTO @AvaStatus (ReserveDate, TableType, Shared, TotalAva)
    SELECT
        @StartDate,
        TableType,
        Shared,
        (CASE
            WHEN Shared = 'FULL' THEN COUNT(*)
            ELSE COUNT(*) END) 
        + (SELECT COUNT(*) FROM TableSharedDetails
          WHERE Shared = 'FULL'
          AND TableType = A.TableType
          GROUP BY TableType) AS TotalAva
    FROM TableMaster A
End
Select * From @AvaStatus

Answer 1

假设ReservedDate的数据类型为foreach (Match match in Regex.Matches(File.ReadAllText(file), @"<Root>[.\s]*<\/Root>")) {}。

尝试：

Date

SQL小提琴：http://sqlfiddle.com/#!6/84458/33

说明：

1- declare @startDate date declare @endDate date select @startDate = '2016-12-28' select @endDate = '2016-12-31' -- Recursive CTE to generate dates between start and end dates ;with dateRange as ( select @startDate as dt union all select dateadd(dd, 1, dt) from dateRange where dateadd(dd, 1, dt) < +dateadd(dd, 1, @endDate) ) select tbl_master.dt as ReservedDate, tbl_master.TableType, tbl_master.Shared, case tbl_master.shared when 'FULL' then tbl_master.avail+coalesce(tbl_shared.shared_count,0) when 'SHARED' then tbl_master.avail-coalesce(tbl_shared.shared_count,0) else tbl_master.avail end as Totalavail from ( -- Join date range data with `TableMaster` to get table availablity select dateRange.dt,TableMaster.TableType,TableMaster.Shared,count(*) as avail from dateRange left join TableMaster on 1=1 group by dateRange.dt,TableMaster.TableType,TableMaster.Shared ) as tbl_master -- Join `TableSharedDetails` for adding and subtracting counts from table availability left join ( select ReservedDate,TableType,count(*) as shared_count from TableSharedDetails group by ReservedDate,TableType ) tbl_shared on tbl_master.dt=tbl_shared.ReservedDate and tbl_master.TableType=tbl_shared.TableType;的使用：这是用于生成提供给存储过程的开始日期和结束日期之间的日期的递归CTE。

2-生成日期范围后，使用with dateRange加入范围数据以获取表的可用性。由于没有特定的条件要加入，所以我将1 = 1（在所有条件下均为True）将所有日期范围数据与TableMaster组合。

3-获得表可用性后，加入TableMaster以添加和减去FULL和共享表数据。

加入2个表并过滤Sql查询

1 个答案: