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mLipok

SQL Query question

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I have an MS SQL DB with Table which have columns :   [Tabel ID], [SIGNATURE ID ], [DATE], [TEXT]

this is an simple SQL QUERY

Quote

SELECT [SIGNATURE ID ], [DATE] FROM [TABLE]
WHERE [TEXT] like '%urz%skarb%'
ORDER BY [SIGNATURE ID ], [DATE] ASC

This query is only first step in my task.

I was trying to get unique [SIGNATURE ID] but only for the latest [DATE]

Can anybody show me the proper SQL Query ?

 

Regards,
mLipok

Remarks:
It may sound strange even stupid, because although I know ADO and other technologies well, I do not work with complicated SQL Queries, I usually have very simple cases.

 

EDIT:
I know that I can use .GetRows from this SQL Query which I post, and then loop through this table, analyze them and create new result table, but I was trying to do this with one query without any further AutoIt analysis, which should be much faster for large amount of data (about 10000 rows which I get from my first query ).

 

Edited by mLipok

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"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

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SELECT [SIGNATURE ID ], [DATE] FROM [TABLE]
WHERE [TEXT] like '%urz%skarb%'
ORDER BY [DATE] ASC LIMIT 1

Will return one row with the requested columns for the oldest date satisfying text search.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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1 hour ago, jchd said:

Will return one row with the requested columns for the oldest date satisfying text search.

My intention was to get latest [DATE] for each unique [SIGNATURE ID] ,   I mean not single row.

16 minutes ago, user4157124 said:

To group by [SIGNATURE ID] showing last [DATE] for each:

SELECT
    [SIGNATURE ID],
    MAX([DATE])
FROM
    [TABLE]
WHERE
    [TEXT] LIKE '%urz%skarb%'
GROUP BY
    [SIGNATURE ID]
ORDER BY
    [DATE] ASC
;

 

I think/hope this should be what I was looking for.
I will check it soon and back with results.

 

Edited by mLipok

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PDF Related:https://www.autoitscript.com/forum/topic/177368-how-to-get-reference-to-pdf-object-embeded-in-ie/ *

I encourage you to read: * Global Vars * Best Coding Practices * Please explain code used in Help file for several File functions * OOP-like approach in AutoIt * UDF-Spec Questions *  EXAMPLE: How To Catch ConsoleWrite() output to a file or to CMD *

"Homo sum; humani nil a me alienum puto" - Publius Terentius Afer
"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

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Probably not that then: grouping is done first, which result in one (random) row being selected for each signature; then the resultset is sorted on date ascending. SQL doesn't explicitely specify which row is selected by GROUP BY, so assume the choice is random and not repeatable. Hence the resulting row may not be the oldest date for each signature.

In the OP I understood "unique signature" as "one row".

 


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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Is there any way to make any QUERY < SUBQUERY < SUBQUERY solution ?

 


Signature beginning:   Wondering who uses AutoIT and what it can be used for ?
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Include Dependency Tree (Tool for analyzing script relations)
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Spoiler

Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind. 

My contribution (my own projects): * Debenu Quick PDF Library - UDF * Debenu PDF Viewer SDK - UDF * Acrobat Reader - ActiveX Viewer * UDF for PDFCreator v1.x.x * XZip - UDF * AppCompatFlags UDF * CrowdinAPI UDF * _WinMergeCompare2Files() * _JavaExceptionAdd() * _IsBeta() * Writing DPI Awareness App - workaround * _AutoIt_RequiredVersion() * Chilkatsoft.au3 UDF * TeamViewer.au3 UDF * JavaManagement UDF * VIES over SOAP * WinSCP UDF * GHAPI UDF - modest begining - comunication with GitHub REST APIErrorLog.au3 UDF - A logging Library *

My contribution to others projects or UDF based on  others projects: * _sql.au3 UDF  * POP3.au3 UDF *  RTF Printer - UDF * XML.au3 UDF * ADO.au3 UDF SMTP Mailer UDF * Dual Monitor resolution detection * * 2GUI on Dual Monitor System * _SciLexer.au3 UDF * SciTE - Lexer for console pane

Useful links: * Forum Rules * Forum etiquette *  Forum Information and FAQs * How to post code on the forum * AutoIt Online Documentation * AutoIt Online Beta Documentation * SciTE4AutoIt3 getting started * Convert text blocks to AutoIt code * Games made in Autoit * Programming related sites * Polish AutoIt Tutorial * DllCall Code Generator * 

Wiki: Expand your knowledge - AutoIt Wiki * Collection of User Defined Functions * How to use HelpFile * Good coding practices in AutoIt * 

IE Related:  * How to use IE.au3  UDF with  AutoIt v3.3.14.x * Why isn't Autoit able to click a Javascript Dialog? * Clicking javascript button with no ID * IE document >> save as MHT file * IETab Switcher (by LarsJ ) * HTML Entities * _IEquerySelectorAll() (by uncommon) * IE in TaskScheduler

PDF Related:https://www.autoitscript.com/forum/topic/177368-how-to-get-reference-to-pdf-object-embeded-in-ie/ *

I encourage you to read: * Global Vars * Best Coding Practices * Please explain code used in Help file for several File functions * OOP-like approach in AutoIt * UDF-Spec Questions *  EXAMPLE: How To Catch ConsoleWrite() output to a file or to CMD *

"Homo sum; humani nil a me alienum puto" - Publius Terentius Afer
"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

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That can be done with a CTE:

with [sigs] as (select distinct [signature id] [s] from [table] where [TEXT] like '%urz%skarb%') 
select [s], (select min([date]) from [table] [d] where [d.sign] = [s]) from [sigs];

Edit: can as well be written as a self-join, but I find CTEs clearer.

Edited by jchd

This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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@jchd Aggregate function MAX() on [DATE] explicitly defines selected value per group. Exact record should be irrelevant ([SIGNATURE ID] is equal for each group's record; they're grouped). ORDER BY aims to sort result (not records in each group). Described behavior would indeed occur if no aggregation were applied (incorrect use of GROUP BY). Did I misunderstand something?

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OK, you're right. I was also confused by MAX while you actually mean MIN. The order by clause is irrelevant, unless output order is meant by date or any other criterion.

I'm an SQLite fan and I know engines differ on how grouping-aggregation work: some bark other not, SQLite being overly friendly in trying to be kind. Not having ever used MS SQL I suspected it could behave differently.

Sorry for noise I should have paid more attention.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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I can't understand properly because i am new in this filed to learning SQL as a beginner. I have also some query can you suggest the best forum. I follow https://hackr.io/tutorials/learn-sql to learn SQL programming. is there any other better way

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Which engine are you using? SQL has a number of variants (even deviant) implementations.

My recommendation to learn SQL would be to start with a "simple" yet powerful engine you can play with easily: SQLite. No installation nor maintenance needed as it's an embedded engine (not client-server). You can download and play with some free third-pary SQLite DB manager (I recommend SQLite Expert).

Create some DBs and learn the basics by guided experimentation (W3school is a good reference; also sqlite.org website). Assign yourself a sensible goal: i.e. create a cute complete directory of relatives and friends (adding more details at each design step). Then build an appointments scheduler coupled with your contacts with features similar to what the apps in your smartphone offer.

Another direction: supply chain management. Build something to handle suppliers, items, buys, stock, orders, sales, deliveries, payments. You can just do with what you buy and use in your own home (real or simulated). All products come with a barcode, add designation, type; enter date bought, price, quantity, date used.  Create views to profile your consumption of various types of items: food, or wearables, or ..., etc. grouped by period, or maker, or whatever criterion of your choice.

If you're serious about learning the possibilities are endless.

Don't waste your time making programmatic applications: just enter directly data in base tables then use the built-in SQL tabs to issue SQL statements and/or use ad-hoc views to access your data. This way you can concentrate your time on manipulating SQL, accumulating working knowledge during your learning curve.

Don't forget to try large DBs (samples available on the net) and see how to optimize both the DB design and queries.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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On 12/20/2018 at 1:05 PM, mLipok said:

I was trying to get unique [SIGNATURE ID] but only for the latest [DATE]

SELECT sig
        WHERE date in 
        (select max(date) from table);

Or

SELECT distinct sig, date 
    from [table]
    order by date desc

==> Should return a two column list of sigs and dates, with the top items being most recent dates. DISTINCT should give you a single instance of each sig

 

Am I too late to the party?

Is it possible to provide SQLite example? (the SQL should be very similar)

Edited by Skysnake
another option

Skysnake

Why is the snake in the sky?

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SELECT distinct
    [SIGNATURE ID ]
FROM 
    [TABLE]
WHERE 
    [TEXT] like '%urz%skarb%'
    and DATE in
    (
        select 
            max([date])
        from
            [table]
        where
            [TEXT] like '%urz%skarb%'
    )
 

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Thank you for you answer.

And :welcome: to the AutoIt forum.

 


Signature beginning:   Wondering who uses AutoIT and what it can be used for ?
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Include Dependency Tree (Tool for analyzing script relations)
ADO.au3 UDF     POP3.au3 UDF     XML.au3 UDF    How to use IE.au3  UDF with  AutoIt v3.3.14.x  for other useful stuff click the following button

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Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind. 

My contribution (my own projects): * Debenu Quick PDF Library - UDF * Debenu PDF Viewer SDK - UDF * Acrobat Reader - ActiveX Viewer * UDF for PDFCreator v1.x.x * XZip - UDF * AppCompatFlags UDF * CrowdinAPI UDF * _WinMergeCompare2Files() * _JavaExceptionAdd() * _IsBeta() * Writing DPI Awareness App - workaround * _AutoIt_RequiredVersion() * Chilkatsoft.au3 UDF * TeamViewer.au3 UDF * JavaManagement UDF * VIES over SOAP * WinSCP UDF * GHAPI UDF - modest begining - comunication with GitHub REST APIErrorLog.au3 UDF - A logging Library *

My contribution to others projects or UDF based on  others projects: * _sql.au3 UDF  * POP3.au3 UDF *  RTF Printer - UDF * XML.au3 UDF * ADO.au3 UDF SMTP Mailer UDF * Dual Monitor resolution detection * * 2GUI on Dual Monitor System * _SciLexer.au3 UDF * SciTE - Lexer for console pane

Useful links: * Forum Rules * Forum etiquette *  Forum Information and FAQs * How to post code on the forum * AutoIt Online Documentation * AutoIt Online Beta Documentation * SciTE4AutoIt3 getting started * Convert text blocks to AutoIt code * Games made in Autoit * Programming related sites * Polish AutoIt Tutorial * DllCall Code Generator * 

Wiki: Expand your knowledge - AutoIt Wiki * Collection of User Defined Functions * How to use HelpFile * Good coding practices in AutoIt * 

IE Related:  * How to use IE.au3  UDF with  AutoIt v3.3.14.x * Why isn't Autoit able to click a Javascript Dialog? * Clicking javascript button with no ID * IE document >> save as MHT file * IETab Switcher (by LarsJ ) * HTML Entities * _IEquerySelectorAll() (by uncommon) * IE in TaskScheduler

PDF Related:https://www.autoitscript.com/forum/topic/177368-how-to-get-reference-to-pdf-object-embeded-in-ie/ *

I encourage you to read: * Global Vars * Best Coding Practices * Please explain code used in Help file for several File functions * OOP-like approach in AutoIt * UDF-Spec Questions *  EXAMPLE: How To Catch ConsoleWrite() output to a file or to CMD *

"Homo sum; humani nil a me alienum puto" - Publius Terentius Afer
"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

Signature last update: 2020-09-20

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This works with SQL[ite]:

CREATE TABLE "Signatures" (
  "Signature" CHAR, 
  "Stamp" CHAR DEFAULT (Datetime('now', 'utc')));

insert into Signatures values 
('aaa','2019-12-10 13:30:18'),
('bbb','2019-12-10 13:30:22'),
('aaa','2019-12-10 13:30:26'),
('ccc','2019-12-10 13:30:30'),
('aaa','2019-12-10 13:30:32'),
('ddd','2019-12-10 13:30:37'),
('bbb','2019-12-10 13:30:39'),
('ccc','2019-12-10 13:30:41'),
('aaa','2019-12-10 13:30:44'),
('eee','2019-12-10 13:30:47'),
('fff','2019-12-10 13:39:40'),
('ggg','2019-12-10 13:39:44'),
('bbb','2019-12-10 13:39:47'),
('bbb','2019-12-10 13:39:49'),
('ddd','2019-12-10 13:39:53'),
('aaa','2019-12-10 13:39:54'),
('hhh','2019-12-10 13:39:57');

select
  distinct Signature Who,
  stamp LastDate
from
  signatures
group by
  who
having
  stamp = max(stamp)
order by
  LastDate asc;

gives:

Who LastDate
ccc 2019-12-10 13:30:41
eee 2019-12-10 13:30:47
fff 2019-12-10 13:39:40
ggg 2019-12-10 13:39:44
bbb 2019-12-10 13:39:49
ddd 2019-12-10 13:39:53
aaa 2019-12-10 13:39:54
hhh 2019-12-10 13:39:57

 


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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You're right, don't know why I used a having clause here. Anyway, no need of a subquery.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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