Jeff Moden

Forum Replies Created

Viewing 15 posts - 361 through 375 (of 59,095 total)

Reply To: MySQL joining - a tricky problem from a newby

dkreynolds wrote:
Jeff, This works perfectly. The LEFT JOIN did the trick. I'm investigating this as part of my quest for knowledge. Thanks!
Thank you for the feedback!
--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)

November 4, 2024 at 9:48 pm

#4477426
Reply To: problem with PIVOT Table

To follow up on Eddie Wuerch's good post, it's an old but powerful bit of ancient code known as a CROSSTAB. You can get a good introduction to them in...
--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)

November 4, 2024 at 12:56 am

#4477088
Reply To: how to force SS to run certain SP in parallel?

I'm not a ninja at it but you could try it in a "Maintenance Plan". To execute a proc, you would use an execute SQL block. You could have the...
--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)

November 2, 2024 at 4:13 am

#4476680
Reply To: Iterative query to sum a colum relating to dates.

Here's another method. I got this idea for Piet Linden's post above. We could work on the dates as he suggested because your latest data has overlapping date ranges but...
--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)

October 31, 2024 at 5:09 am

#4475785
Reply To: Iterative query to sum a colum relating to dates.

Tallboy wrote:
Thanks Jeff, that worked well.
Can I ask you to explain how it works, as reading it does nto make a lot of sense.
Kind regards.
Sure...
If we look at the original...
--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)

October 31, 2024 at 4:01 am

#4475768
Reply To: From each string, extract numbers following a '#' and create separate row

SqlRookie wrote:
I am still evaluating how to apply this to an existing table..
And there's the rub. Please provide 5 to 10 rows of readily consumable data for use to operate...
--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)

October 31, 2024 at 1:42 am

#4475733
Reply To: From each string, extract numbers following a '#' and create separate row

Alan... you might want to explain what the bernieML.samd. stuff is.
--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)

October 31, 2024 at 1:16 am

#4475730
Reply To: strange selection for update

There should be an additional lesson learned here... when doing modifications to rows, start with BEGIN TRANSACTION and then run the UPDATE. If the rowcount is right, then COMMIT else...
--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)

October 31, 2024 at 12:08 am

#4475720
Reply To: How to determine if a DB is currently being used

You can have a look at sys.dm_db_index_usage_stats() to see if there have been any reads or writes since the last time the SQL Server Service was started.
Once you've decided that...
--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)

October 30, 2024 at 11:58 pm

#4475716
Reply To: Update Function

fk.da wrote:
Hello everyone,
I need your help. I have a “datetime” column (data type is Varchar(64) )with the following content: Sun Sep 29 2024 09:28:55 GMT+0000 (Coordinated Universal Time)
I would...
--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)

October 30, 2024 at 11:55 pm

#4475713
Reply To: MySQL joining - a tricky problem from a newby

Try this... notice the only change is a couple of left outer join's for the drivers table (the word OUTER is optional... I left it out). I not only did...
--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)

October 30, 2024 at 12:08 am

#4475180
Reply To: Pivot Using SQL

First, thank you for helping us help you by posting the readily consumable data code.
Ed B.'s code is good, although I'll never use PIVOT because of the issue he pointed...
--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)

October 29, 2024 at 11:48 pm

#4475175
Reply To: MySQL joining - a tricky problem from a newby

dkreynolds wrote:
Thanks for this. It confirms my googling explroations, and I'm about to try it.
I wonder what will happen on those requests where a driver hasn't yet been allocated. They...
--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)

October 28, 2024 at 8:50 pm

#4474729
Reply To: Iterative query to sum a colum relating to dates.

It turns out that I simply misread the dd/mm/yyyy format of the expected answer and the original code that I posted was just fine. Here's that post again...
Apparently, you didn't...
--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)

October 28, 2024 at 6:16 pm

#4474667
Reply To: Iterative query to sum a colum relating to dates.

Sorry... made a mistake... will repost in, hopefully, a couple of minutes.
--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)

October 28, 2024 at 6:07 pm

#4474663

Viewing 15 posts - 361 through 375 (of 59,095 total)