Question

如何重复行值到结束日期

例如

表1

Date         Name   Dept 
-----------------------
12-02-2009   Raja   IT
13-02-2009   Ravi   CSE
14-02-2009   Ramu   ECE

从上表中我想重复从12-02-2009到12-03-2009两个日期之间的值。

预期产出

Date         Name   Dept 
--------------------------
12-02-2009   Raja   IT
13-02-2009   Ravi   CSE
14-02-2009   Ramu   ECE
15-02-2009   Raja   IT
16-02-2009   Ravi   CSE
17-02-2009   Ramu   ECE
18-02-2009   Raja   IT
19-02-2009   Ravi   CSE
20-02-2009   Ramu   ECE
...
...
12-03-2009

如何查询重复行值到结束日期，或者在vb.net中使用while循环如

码

select max(date) from table

while max(date) < End Date

'Repeat the row values

end while

我的表格结构

日期名称部门时间

12-02-2009   Raja   IT  09:00 
13-02-2009   Ravi   CSE 18:00 
14-02-2009   Ramu   ECE 10:00

预期产出

Date Name Dept Time StartDate EndDate

12-02-2009   Raja   IT  09:00 12-02-2009 12-02-2009
13-02-2009   Ravi   CSE 18:00 13-02-2009 14-02-2009
14-02-2009   Ramu   ECE 10:00 14-02-2009 14-02-2009

...

如果StartDate与Date列的值相同对于EndDate，我必须检查时间列，如果时间大于17:00，它应该在EndDate列中显示下一个日期。

需要SQL查询或VB.Net代码帮助

Answer 1

您可以尝试类似

的内容

DECLARE @Table TABLE(
        Date DATETIME,
        Name VARCHAR(50),
        Dept VARCHAR(50)
)

INSERT INTO @Table SELECT '12 Feb 2009', 'Raja', 'IT'
INSERT INTO @Table SELECT '13 Feb 2009', 'Ravi', 'CSE'
INSERT INTO @Table SELECT '14 Feb 2009', 'Ramu', 'ECE'



DECLARE @StartDate DATETIME,
        @EndDate DATETIME,
        @Count INT

SELECT @Count = COUNT(1) FROM @Table

SELECT @StartDate = '12 Feb 2009',
        @EndDate = '12 Mar 2009'

--using CTE create a date range, and associated id per date
;WITH Dates AS (
        SELECT  @StartDate DateVal,
                0 ID
        UNION ALL
        SELECT  DateVal + 1,
                (ID + 1) % @Count
        FROM Dates
        WHERE DateVal + 1 <= @EndDate
),
--using cte, create id per entry in the table you wish to repeat
RowNumbers AS(
        SELECT  *,
                ROW_NUMBER() OVER(ORDER BY Date) ID
        FROM    @Table
)
--join dates to table to repeat id generated ids.
SELECT  *
FROM    Dates d LEFT JOIN
        RowNumbers r on d.ID + 1 = r.ID

看看

用于执行来自vb.net/c＃

的params的查询

修改

要获得预期的输出，您可以尝试

DECLARE @Table TABLE( Date DATETIME, Name VARCHAR(50), Dept VARCHAR(50), Time VARCHAR(5) ) INSERT INTO @Table SELECT '12 Feb 2009','Raja','IT','09:00' INSERT INTO @Table SELECT '13 Feb 2009','Ravi','CSE','18:00' INSERT INTO @Table SELECT '14 Feb 2009','Ramu','ECE','10:00' SELECT *, Date AS StartDate, CASE WHEN CAST(LEFT(Time,2) AS INT) > 17 THEN Date + 1 ELSE DATE END EndDate FROM @Table

现在您需要在ROW_NUMBER（）行中决定要用于订购的日期，或者您希望按日期重复行的方式。

修改

This is how you would insert values DECLARE @InsertTable TABLE( DateVal DATETIME, ID INT, Date DATETIME, Name VARCHAR(50), Dept VARCHAR(50) ) DECLARE @Table TABLE( Date DATETIME, Name VARCHAR(50), Dept VARCHAR(50) ) INSERT INTO @Table SELECT '12 Feb 2009', 'Raja', 'IT' INSERT INTO @Table SELECT '13 Feb 2009', 'Ravi', 'CSE' INSERT INTO @Table SELECT '14 Feb 2009', 'Ramu', 'ECE' DECLARE @StartDate DATETIME, @EndDate DATETIME, @Count INT SELECT @Count = COUNT(1) FROM @Table SELECT @StartDate = '12 Feb 2009', @EndDate = '12 Mar 2009' --using CTE create a date range, and associated id per date ;WITH Dates AS ( SELECT @StartDate DateVal, 0 ID UNION ALL SELECT DateVal + 1, (ID + 1) % @Count FROM Dates WHERE DateVal + 1 <= @EndDate ), --using cte, create id per entry in the table you wish to repeat RowNumbers AS( SELECT *, ROW_NUMBER() OVER(ORDER BY Date) ID FROM @Table ) --join dates to table to repeat id generated ids. INSERT INTO @InsertTable --INSERT VALUES HERE SELECT d.DateVal, d.ID, r.Date, r.Name, r.Dept FROM Dates d LEFT JOIN RowNumbers r on d.ID + 1 = r.ID OPTION (MAXRECURSION 0) --this is required. SELECT * FROM @InsertTable

如何重复行值

1 个答案: