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Grouping records by time interval


Grouping records by time interval

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geert.de.vylder
geert.de.vylder
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ChrisM@Work (3/6/2013)

I meant in terms of potentially reducing the rowcount.
Let's call a set from this table containing the same day, all of the intervals, and the same Event_Channel, a frame. One frame contains 96 rows, one row per interval. There are 9 event channels so there are 864 rows per date. Multiply 864 by the number of dates in the tickets table - 1366 - to yield the number of rows in the matrix table.
One possibility is to remove frames which don't have any corresponding rows in the tickets table.


Sorry,

I misunderstood you.
Then the best would be to work with a variable of the datetime type and set this variable to a fix date (for example 2013-03-01 YYYY-MM-DD format) or to set it to yesterdays date. And then retreive the frame for all 9 event channels.

Would that be better?

Greetz,

Geert
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geert.de.vylder (3/6/2013)
ChrisM@Work (3/6/2013)

I meant in terms of potentially reducing the rowcount.
Let's call a set from this table containing the same day, all of the intervals, and the same Event_Channel, a frame. One frame contains 96 rows, one row per interval. There are 9 event channels so there are 864 rows per date. Multiply 864 by the number of dates in the tickets table - 1366 - to yield the number of rows in the matrix table.
One possibility is to remove frames which don't have any corresponding rows in the tickets table.


Sorry,

I misunderstood you.
Then the best would be to work with a variable of the datetime type and set this variable to a fix date (for example 2013-03-01 YYYY-MM-DD format) or to set it to yesterdays date. And then retreive the frame for all 9 event channels.

Would that be better?

Greetz,

Geert


I've no idea, Geert. Folks here on SSC will help you with coding decisions; this is more of a business decision. A date filter seems sensible to me but is it appropriate for the consumers of the data? How many days' worth of data are other folks expecting to see?

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
geert.de.vylder
geert.de.vylder
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ChrisM@Work (3/6/2013)


I've no idea, Geert. Folks here on SSC will help you with coding decisions; this is more of a business decision. A date filter seems sensible to me but is it appropriate for the consumers of the data? How many days' worth of data are other folks expecting to see?


We would like to see a month worth of data. Let's say February.
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geert.de.vylder (3/6/2013)
ChrisM@Work (3/6/2013)


I've no idea, Geert. Folks here on SSC will help you with coding decisions; this is more of a business decision. A date filter seems sensible to me but is it appropriate for the consumers of the data? How many days' worth of data are other folks expecting to see?


We would like to see a month worth of data. Let's say February.


How about "all data for last month - which as of today will be February"?

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
ChrisM@Work
ChrisM@Work
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geert.de.vylder (3/6/2013)
ChrisM@Work (3/6/2013)


I've no idea, Geert. Folks here on SSC will help you with coding decisions; this is more of a business decision. A date filter seems sensible to me but is it appropriate for the consumers of the data? How many days' worth of data are other folks expecting to see?


We would like to see a month worth of data. Let's say February.


There's no data in the table for February :-P

-- last month:
SELECT
   MonthStart = DATEADD(month,DATEDIFF(month,0,getdate())-1,0), -- 1st Feb
   MonthEnd = DATEADD(month,DATEDIFF(month,0,getdate()),0) -- 1st Mar
   
-- month before last:
SELECT
   MonthStart = DATEADD(month,DATEDIFF(month,0,getdate())-2,0), -- 1st Jan
   MonthEnd = DATEADD(month,DATEDIFF(month,0,getdate())-1,0) -- 1st Feb

-- Usage:
SELECT *
FROM Tussen_Tickets
WHERE Ticket_Closed_DateTime >= DATEADD(month,DATEDIFF(month,0,getdate())-1,0) -- greater than or equal to
   AND Ticket_Closed_DateTime < DATEADD(month,DATEDIFF(month,0,getdate()),0) -- LESS THAN



“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
geert.de.vylder
geert.de.vylder
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ChrisM@Work (3/6/2013)


There's no data in the table for February :-P

-- last month:
SELECT
   MonthStart = DATEADD(month,DATEDIFF(month,0,getdate())-1,0), -- 1st Feb
   MonthEnd = DATEADD(month,DATEDIFF(month,0,getdate()),0) -- 1st Mar
   
-- month before last:
SELECT
   MonthStart = DATEADD(month,DATEDIFF(month,0,getdate())-2,0), -- 1st Jan
   MonthEnd = DATEADD(month,DATEDIFF(month,0,getdate())-1,0) -- 1st Feb

-- Usage:
SELECT *
FROM Tussen_Tickets
WHERE Ticket_Closed_DateTime >= DATEADD(month,DATEDIFF(month,0,getdate())-1,0) -- greater than or equal to
   AND Ticket_Closed_DateTime < DATEADD(month,DATEDIFF(month,0,getdate()),0) -- LESS THAN



I do get 160 rows for february from the Tusen_Tickets table. But this is the Original not aggregated table Tussen_Tickets.
I'm getting desperate now, because I dont get any result from the last query with the 2 temp tables.
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SELECT MAX(Ticket_Closed_DateTime)
FROM Tussen_Tickets

-- returns '2013-01-17 10:22:00.000'

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
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