How can i change dataset cell format - sql

Question

if i use this query thath creates a table(look Table1), But VisitingGap column is not correct format.
i used cast method to give format. But not working correctly.i need Table2
declare #date1 nvarchar(100) , #date2 nvarchar(100) , #countgap int,#count int
set #date1='2009-05-12'
set #date2 = '2009-05-13'
set #countgap = 30
set #count=48
CREATE TABLE #Temp (VisitingCount int, [Time] int, [Date] datetime )
DECLARE #DateNow DATETIME,#i int,#Time int, #Date datetime
set #DateNow='00:00'
set #i=1;
while(#i<#count)
begin
set #DateNow = DATEADD(minute, #countgap, #DateNow)
set #Time = (datepart(hour,#DateNow)*60+datepart(minute,#DateNow))/#countgap
set #Date = CONVERT(VARCHAR(5),#DateNow, 108)
insert into #Temp(VisitingCount,[Time],[Date]) values(0,#Time,#Date )
set #i=#i+1
end
select
Sum(VisitingCount) as VisitingCount, [Time],
Cast([Time]*#countgap/60 as nvarchar(50)) +':'+Cast( [Time]*#countgap%60 as nvarchar(50))
from (
select 0 as VisitingCount, [Time] from #Temp
Union All
select count(page) as VisitingCount,
(datepart(hour,Date)*60+datepart(minute,Date))/#countgap as [Time]
from scr_SecuristLog
where Date between #date1 and #date2
GROUP BY (datepart(hour,Date)*60+datepart(minute,Date))/#countgap
) X
group by [Time]
order by 2 asc
Table 1 :
.
.
.
VCount Time VisitingGap
0 1 0:30
0 2 1:0
0 3 1:30
0 4 2:0
0 5 2:30
0 6 3:0
0 7 3:30
0 8 4:0
0 9 4:30
0 10 5:0
.
.
.
Table 2 : i need below table !!!!
.
.
.
VCount Time VisitingGap
0 1 00:30
0 2 01:00
0 3 01:30
0 4 02:00
0 5 02:30
0 6 03:00
0 7 03:30
0 8 04:00
0 9 04:30
0 10 05:00
.
.
.
Look please! i think problem the cast method
Cast([Time]*#countgap/60 as nvarchar(50)) +':'+Cast( [Time]*#countgap%60 as nvarchar.........

Answer 1

Instead of casting numerics to strings, try converting to dates and the dates to strings:
CONVERT(CHAR(5), DATEADD(mi, [Time], '1900-01-01'), 108)

Answer 2

You have the answer staring you in the face in the while loop :
CONVERT(VARCHAR(5),#DateNow, 108)
Replace #DateNow with [Date] and you've got it.

Answer 3

What a mess. Use an auxiliary numbers table (avoids the loop) and handle your slot grouping that way. Also note that your use of between can have problems, which is why I always use a >= and < construct.
/*
-- DROP Numbers table if it exists
IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Numbers]') AND type in (N'U'))
DROP TABLE [dbo].[Numbers]
GO
-- Now re-create it and fill it with sequential numbers starting at 1
SELECT TOP 10000 IDENTITY(INT,1,1) AS Num
INTO dbo.Numbers
FROM master.INFORMATION_SCHEMA.COLUMNS i1
CROSS JOIN master.INFORMATION_SCHEMA.COLUMNS i2;
GO
-- Add a primary key/clustered index to the numbers table
ALTER TABLE dbo.Numbers
ADD CONSTRAINT PK_Numbers PRIMARY KEY CLUSTERED (Num);
GO
*/
CREATE TABLE #Log (
page varchar(255) NOT NULL
,date datetime NOT NULL
)
INSERT INTO #Log
VALUES (
'page1'
,'2009-05-12 08:30'
)
INSERT INTO #Log
VALUES (
'page1'
,'2009-05-12 08:35'
)
INSERT INTO #Log
VALUES (
'page2'
,'2009-05-12 07:30'
)
INSERT INTO #Log
VALUES (
'page2'
,'2009-05-12 09:35'
)
DECLARE #date1 datetime
,#date2 datetime
,#countgap int
,#count int
SET #date1 = '2009-05-12'
SET #date2 = '2009-05-13'
SET #countgap = 30
SET #count = (24 * 60) / #countgap
;
WITH LogX
AS (
SELECT *
,DATEADD(DAY, -DATEDIFF(DAY, 0, date), date) AS time
FROM #Log
WHERE date >= #date1 AND date < DATEADD(DAY, 1, #date2)
),
Slots
AS (
SELECT Num
,DATEADD(MINUTE, (Num - 1) * #countgap, 0) AS SlotStart
,DATEADD(MINUTE, Num * #countgap, 0) AS SlotEnd
FROM Numbers
WHERE Num <= #count
)
SELECT Num, CONVERT(varchar(5), SlotEnd, 108) AS [Time], COUNT(page) AS VistingCount
FROM Slots
LEFT JOIN LogX
ON LogX.TIME >= Slots.SlotStart
AND LogX.TIME < Slots.SlotEnd
GROUP BY Num, SlotEnd
DROP TABLE #Log

Answer 4

when you do the math, you lose the leading zeros, this will add them back when you form the string
EDIT
original code--> Cast([Time]*#countgap/60 as nvarchar(50)) +':'+ Cast( [Time]*#countgap%60 as nvarchar(50))
changed code--->RIGHT('00'+Cast([Time]*#countgap/60 as varchar(2) ),2) +':'+RIGHT('00'+Cast( [Time]*#countgap%60 as varchar(2) ),2)