How to parse this, 'F0-B20170225131636437{A^CM.INIT}'

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How to parse this, 'F0-B20170225131636437{A^CM.INIT}'

NineIron

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March 7, 2017 at 12:22 pm

#321067

What is the best way to parse out 'CM.INIT' from 'F0-B20170225131636437{A^CM.INIT}'?

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Luis Cazares SSC Guru Points: 183706 More actions · Answer 1

NineIron - Tuesday, March 7, 2017 12:22 PM
What is the best way to parse out 'CM.INIT' from 'F0-B20170225131636437{A^CM.INIT}'?

Can you explain the rules?

Luis C.
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Lowell SSC Guru Points: 323518 More actions · Answer 2

if we assume there's only one carat, and only one curly brace:
/* (No column name) CM.INIT CM.INIT */WITH MySampleData(val) AS ( SELECT 'F0-B20170225131636437{A^CM.INIT}' UNION ALL SELECT 'F1-B30170226136437{A^CM.INIT}' ) --assuming only one carat exists, and only one right curly brace SELECT CASE WHEN CHARINDEX('^',val) > 0 AND CHARINDEX('}',val) > CHARINDEX('^',val) THEN SUBSTRING(val,CHARINDEX('^',val) + 1,CHARINDEX('}',val) - (CHARINDEX('^',val) + 1)) ELSE '' END FROM MySampleData

Lowell

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sgmunson SSC Guru Points: 110640 More actions · Answer 3

NineIron - Tuesday, March 7, 2017 12:22 PM
What is the best way to parse out 'CM.INIT' from 'F0-B20170225131636437{A^CM.INIT}'?

Like Luis said, what are the rules? Does the field that contains this value have any variations in length or format? What other possible values can be present? Are the braces "{ }" ALWAYS present in any given value? Is the ^ present in every record? There needs to be an exact set of rules one can follow to determine if that value can consistently be retrieved from a given record. And you have to be TOTALLY anal about ensuring that all the data ALWAYS follows ALL the rules. There are going to be occasions when data suddenly no longer follows the rules. Sometimes, you can change the rules to accommodate the new variation. Other times, there needs to be a whole new set of rules. In some cases, data just plain breaks the rules in such a way that a new rule or a change to the rules just isn't possible. Let us know...

Steve (aka sgmunson) 🙂 🙂 🙂
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NineIron SSChampion Points: 12537 More actions · Answer 4

I didn't think you needed rules but, here goes.............
The ^ is always the character before the string and the } is always after the string.

Jeff Moden SSC Guru Points: 1004409 More actions · Answer 5

NineIron - Wednesday, March 8, 2017 4:08 AM
I didn't think you needed rules but, here goes.............
The ^ is always the character before the string and the } is always after the string.

That's part of what they wanted to make sure of. The other thing they want to make sure of is, will EVERY row ALWAYS have those two things in it... ALWAYS?

--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.

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NineIron SSChampion Points: 12537 More actions · Answer 6

Got it. I would have said so otherwise in my first post but, I understand why they would want those specifics.

Jeff Moden SSC Guru Points: 1004409 More actions · Answer 7

Did you try Lowell's code (looks like it will work and he's really good about testing his stuff) and, if so, are you all set now?

--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)

NineIron SSChampion Points: 12537 More actions · Answer 8

Sorry, yes I did. I get very easily distracted here at work.
Thanx Lowell.