Forum Replies Created
Viewing 15 posts - 3,331 through 3,345 (of 59,098 total)
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Reply To: Are the data types I've chosen the best choices?
ScottPletcher wrote:Phil Parkin wrote:This link gives a few reasons for choosing shorter varchar lengths.
In terms of storage, CHAR(n) columns are always n characters long.
VARCHAR(n) columns are anything between 2 and...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: Are the data types I've chosen the best choices?
ScottPletcher wrote:Remember, too, that the logical data model should be easily understood and use by business people. In fact, if possible, keep all developers out of the first one or...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: Are the data types I've chosen the best choices?
ScottPletcher wrote:Jeff Moden wrote:- There is no way that I'd ever create column names with spaces in them. It relegates you to always have to use brackets around every column name...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: Are the data types I've chosen the best choices?
I took a look at your spreadsheet and immediately found a pretty nasty issue... about 2/3rds of the rows have duplicated Ticket Numbers.
As for being new to the game, you...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: Datefirst format
No joy on the "new" formula. It has about the same performance for the DATETIME datatype and is 50% slower for the DATE datatype. It's also not "symmetrical" with how...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: Datefirst format
I'm also exploring a different method using the following formula for finding the week start, midweek, and end dates (the 1 needs to be changed to a 4 and 7...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: SQL database practices
Here's another example where it appears to be a well supported "Holy Grail" article. But, it produces "week start dates" that are greater than the original date. That's means it's...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: SQL Server 2016 SP3?
Microsoft SQL Server 2016 service packs are cumulative updates and upgrade all editions and service levels of SQL Server 2016 SP1 to SP2. This service pack contains up to...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: Query help
davelittle wrote:Thanks for the information that you share with us. I will try to figure it out for more.
Hi and welcome aboard.
Be advised that your post looks and smells like...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: Query help
I think that the easiest way would be to add a column to table A with an "OffsetDate" column built in. That will also me nicely indexable and easy to...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: SQL database practices
sqlenthu 89358 wrote:Hello friends, I am a casual learner and right now exploring the DBA field (I am a database developer). Now I recently had a discussion with my group of...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: SQL database practices
Ken McKelvey wrote:multiple bulkier tables with years of data
https://www.sqlshack.com/database-table-partitioning-sql-server/
https://www.brentozar.com/archive/2012/08/potential-problems-partitioning/
Partitioning is not a method of increasing performance of code. In fact, it usually slows code down, sometimes by a far amount.
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: Are the data types I've chosen the best choices?
Mr_X wrote:A newbie here. I have these columns, here are the samples and the data types I've chosen:
I'd just like to ask if the choices I've made...
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: SQL that copies and pastes data in a database that changes
It can't be deleted. No worries there, though. It can actually help others if they end up with a similar question.
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Reply To: How to avoid using operator when there are different values on two tables ?
Jeffrey Williams wrote:It looks like you want the results from the first table when they don't match. For this specific case I would use EXCEPT instead of joining and comparing:
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)
Viewing 15 posts - 3,331 through 3,345 (of 59,098 total)