Transact SQL :: String Hex Comparison And Partitioning?
Oct 22, 2015
Our dev team wants to introduce a complex key, which is made up of
EventDate datetime2(5) = ‘2015-10-22 10:19:59.12345’
ConsumerID bigint = 1234
SiteID tinyint = 15
EventDate will be converted to a bigint and then to a hex value
= 2015-10-22 10:19:59.12345 = 2015102210195912345 = 1BF714C8A0D4F699
ConsumerID will be converted to a hex value
= 1234 = 4D2
SiteID will be converted to a hex value
= 15 = F
The hex values will then be concatenated together and stored as a string (varchar). The application will handle the creation of the complex key
= ‘1BF714C8A0D4F699-4D2-F’
I am trying to argue against this approach and get them to store the values in their native form, in separate columns as a natural key.
To make matters worse, we need to use partitioning, where the partition boundary will be on a hexed datetime2(5) at weekly intervals. I was really hoping a proof of concept would show that hex string comparison could potentially put a row under a wrong partition, but so far, on an 8 million rowset, it is working fine.
For example, in the proof of concept, right partition boundary:
= '1BF398D53DFA1800'
(2014-12-15 00:00:00.00000)
contains rows
= '1BF3983242B9C000-1-2'
(2014-12-08 00:00:00.00000-1-2)
Through to
= '1BF398C373960580-2FAF3003-2'
(2014-12-14 23：59：00.00000-800010243-2）
The prior partition boundary is 1
= 'BF3983242B9C000'
(2014-12-08 00:00:00.00000)
How is this working, given that the string lengths (varchar) are different and the row value contains dashes and the partition boundaries are smaller in length without dashes? How varchar string comparison is working here?
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Oct 11, 2015
DECLARE @Teams AS TABLE(Team VARCHAR(3))
INSERT INTO @Teams
SELECT 'IND'
UNION
SELECT 'SA'
UNION
SELECT 'AUS'
select Team from @Teams where Team > 'AUS'
[code]....
co-relation between comparison operators in WHERE Clause and the respective output.
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Oct 27, 2015
We are currently developing an OLTP application, which will need to purge data when it becomes older than 1 hour.Rather than having a process which deletes rows periodically (and risks locking the tables), I am considering using partitioning on a rolling 15 minute window.The idea is to have 5 active partitions, with the 5<sup>th</sup> one being swapped out, merged and a new one split in. This will allow data to live to a max of 1 hour 15 mins,which is acceptable.
Actually, I will have 8 partitions; there will be 4 partitions set in the future, just to ensure when the last partition is split, there isn’t any data movement, as the newest partition will be empty.I am wondering if there will be any performance issues due to partition swapping, merging and splitting every 15 minutes? The application will have a high volume of users when live. I think this should be a better option that continually deleting from the tables.
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Jul 31, 2015
I am new to Partitioning tables. My scenario is as listed below.
I am getting Monthly Transaction data on Every First Monday of the Month and I want to do partition for those data.
For Example: Let's say I will get my next monthly data on August 3rd 2015 which is First Monday of the month of August.
I want those Transaction data to go in new partitioned FileGroup in my existing partitioned table. How can I do partition for this kind of scenario ? Can we create one or multiple Stored Procedure which will create New Partition and load data in that partition ?
FYI, this monthly data will be loaded in Staging table and that table has LoadDate column which will have 2015-08-03 in it. I am using SQL 2012 Enterprise edition.
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May 15, 2001
Hi,
Assuming a table with a column defined char or varchar.
I have a SQL query like this :
Select * from table1 where column1='Building'
It returns the same result that
Select * from table1 where column1='BUILDING'
It is my understanding SQL Server (verison 7 or 2000, I tried on both) is lower/capital insensitive by default when it is installed. If I want SQL Server to be case-sensitive with my char or varchar columns, where can I set it?
Is it at database level or server level I can find this setting . What is the setting that control it?
Best Regards,
Alain Gagne, Lead DBA
gagnea@msagroup.com
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Jul 23, 2007
i have 2 tables
table1
id name salary
2 sas 2000
3 jsh 2220
table2
id name
1 sas
2 jsh
how can we copmpare string like
name=name
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Apr 4, 2006
Dear All:I encounter one problem when I want to implement my thought. My thoughtis that user want to search a record of someone but maybe user wouldtype wrong name or spell name wrong. I wish to compare the string whichuser inputed to the database column using "Socre Method". "ScoreMethod" has a variable "grade" to accumulate the score. I want toconvert the string to char array, and compare the char one by one. Ifthe string is more accurate , the grade is more high. At last, I choosethe most higher score record to show. How to do this thought with tsql?Could give me some tips or guide to learn? I will appreciate yourkindness, thanks.
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Feb 25, 2008
I'm working on a program that reads in zip codes and then does some checking on them. Occasionally, the end user typos or transposes digits. It's easy enough to identify bad zip codes, but I would like to offer up a single recommendation. The problem is that there are often multiples to choose from. Is there a function or has anyone tried to figure out the delta between two strings?
Thanks
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Nov 10, 2015
I upload data from a Txt File(Txt_Temp) where I have VinNumber with 6 digits. Another table name Resrve_Temp1 where I have Vinumber with 17 digit. Now I need to update the vinnumber 6 digit to 17 digit or to new column in Txt_temp.
Txt_Temp - Table
I tried this code with no succes and only one row is updating
update Txt_Temp Set Txt_Temp.Vinnumber=dbo.R_ResrvStock.Vin
from dbo.R_ResrvStock inner join Txt_Temp on Right (dbo.R_ResrvStock.Vin,6)=Txt_Temp.VinNumber
OR Add this code in view
Select dbo.R_ResrvStock.Vin,R_Txt_Temp.Vinnumber,R_Txt_Te mp.Model_Code
from dbo.R_ResrvStock inner join R_Txt_Temp on Right (dbo.R_ResrvStock.Vin,6)=R_Txt_Temp.VinNumber
Vin
123456
123123
123789
Resrve_Temp1 - Table
asddfghjklk123654
asddfghjklk123456
asddfghjklk321564
asddfghjklk123123
asddfghjklk123789
asddfghjklk654655
asddfghjklk456465
My Result can be in Txt_Temp table or new table or with one or two columns
asddfghjklk123456 123456
asddfghjklk123123 123123
asddfghjklk123789 123789
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Jun 1, 2015
I'm trying to come up with a formula that will calculate the number of lines where two conditions are true.First, SLA must be either breached or achieved.And the second condition must be that the "country" and SLO group must be the same (these two values are located in different tables. So far I have only accomplished the first....
=CALCULATE(DISTINCTCOUNT([ID]),Data![SLA Result]="Breached")
I have tried adding FIND, EXACT or USERELATIONSHIP to the formula to no avail.... I keep running into the same error."The value for 'SLO Group' cannot be determined. Either 'SLO Group' doesn't exist, or there is no current row for a column named 'SLO Group'."
Country
SLO Group
SLA Achieved
SLA Breached
[code]....
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Oct 20, 2015
I need to take all records from table @A where ID = 1. Also i need to process the records with datewise from table @A. Here is the table structure
DECLARE @A TABLE (ID INT, ACCOUNT VARCHAR(10), EFFDT DATE)
INSERT INTO @A VALUES (1,'AAA','2015-10-01')
INSERT INTO @A VALUES (1,'BBB','2015-10-01')
INSERT INTO @A VALUES (1,'CCC','2015-10-01')
INSERT INTO @A VALUES (1,'AAA','2015-10-05')
INSERT INTO @A VALUES (1,'DDD','2015-10-01')
INSERT INTO @A VALUES (2,'AAA','2015-10-02')
INSERT INTO @A VALUES (2,'BBB','2015-10-02')
INSERT INTO @A VALUES (2,'CCC','2015-10-02')
INSERT INTO @A VALUES (2,'DDD','2015-10-02')
[code]...
how to achieve this in SQL query, i cannot use CTE or temp table as i need to use this code in another tool, it has to be single query, can use subquery or join would be better.
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Aug 10, 2015
What i need is to create a function that compares 2 strings variables and if those 2 variables doesn't have at least 3 different characters then return failure , else return success.
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Sep 24, 2015
For Below example when @x=1 to retrieve col>0 rows or all rows.
With out another if else blocks or Dynamic sql to solve only in where clause.
select 0 col into #x
union
select 1 col
union
select 2 col
declare @x INT =1
SELECT * FROM #x
where col>CASE WHEN @x=1 THEN 0 ELSE (col=col) END
--here in case i want to compare only when @x=1 then col>0 other wise select all rows with out filter
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Dec 5, 2006
Hi all,I have created this simple Stored procedure. But it gives me wrong result when I pass a parameter to it. But if I hard
code it, it gives me the right result.
The I check if the field value of 'Email' is exactly equal to the parameter '@Email'.
The field 'Email' is varchar, and CID is integer.
CREATE PROCEDURE EmailExists @Email varcharASSELECT CIDFROM CustomersWHERE Customers.Email = @Emailreturn
Instead, if I check the value directly, it gives me correct answer. The the following code works fine when I typethe Email directly in the code.
CREATE PROCEDURE EmailExists @Email varcharASSELECT CIDFROM CustomersWHERE Customers.Email = 'tomyseba@yahoo.com'
return
Can anyone tell me the reason for it.
Thanking you in advance
Tomy
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Apr 14, 2015
how SQL 2012 would treat a literal string for a comparison similar to below. I want to ensure that the server isn't implicitly converting the value as it runs the SQL, so I'd rather change the data type in one of my tables, as unicode isn't required.
Declare @T Table (S varchar(2))
Declare @S nvarchar(255)
Insert into @T
Values ('AR'), ('AT'), ('AW')
Set @S = 'Auto Repairs'
Select *
from @T T
where case @S when 'Auto Repairs' then 'AR'
when 'Auto Target' then 'AT'
when 'Auto Wash' then 'AW' end = T.STo summarise
in the above would AR, AT and AW in the case statement be treated as a nvarchar, as that's the field the case is wrapped around, or would it be treated as a varchar, as that's what I'm comparing it to.
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Sep 1, 2015
Is there way to search for the particular string and return the string after that searched string
SalesID
Rejection reason
21812
[code]....
The timeout period elapsed hence disqualified
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Jul 28, 2015
I have a string variable and following data.
Declare @ServiceID varchar(200)
set @ServiceID='change chock','change starter','wiring for lights','servicing'
when I assign values in @ServiceID in the above manner then it shows error. How to get string array in @ServiceID variable so that i can go ahead.
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Sep 9, 2015
I want to split the string 'MR JAMES WELL II' into three what is the easiest way of doing?
First part = MR
Second part = II
Third part = JAMES WELL
Tried couple of methods using CHARINDEX/REVERSE but not getting through.
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May 18, 2015
DECLARE @FullName VARCHAR(100)
SET @FullName = 'Vauxhall Adam Rocks AIR Vauxhall'
SELECT LEFT(@FullName, NULLIF(CHARINDEX(' ', @FullName) -1, -1)) AS [FirstName],
RIGHT(@FullName, ISNULL(NULLIF(CHARINDEX(' ', REVERSE(@FullName)) - 1, -1), LEN(@FullName))) AS [LastName]
This is only gives first and last not first and middle
DECLARE @FullName VARCHAR(100)
SET @FullName = 'Vauxhall Adam Rocks AIR Vauxhall'
SELECT
STUFF(@FullName,charindex(' ',SUBSTRING(@FullName,5,LEN(@FullName)))+5,LEN(@FullName),'') [Firstname1],
STUFF(@FullName,1,charindex(' ',SUBSTRING(@FullName,5,LEN(@FullName)))+4,'') Lastname1
Not right as it gives
Vauxhall
Adam Rocks AIR Vauxhall
Ideally the result should be
Vauxhall
Adam Rocks AIR
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Sep 19, 2015
I have a SQL table like this
col1 col2 col3
1 0 0
1 0 1
1 1 1
0 1 0
I am expecting output as
col1 col2 col3 NewCol
1 0 0 SL
1 0 1 SL,PL
1 1 1 SL,EL,PL
0 1 0 EL
condition if col>0 then SL else '', if col2>0 EL else '', if col3>0 PL else ''
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Apr 29, 2015
Currently we have requirement like below.
Input @Filename ="233-sssee-FILENAMETYPE@ssss.xml"
In the DB i have column values like below.
FileType Val
FILENAMETYPE Direct
Now my requirement is to search for FIleTYPE in above table by passing @Filename as parameter and that should return Val as response. How to write a search query for this type.
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Jun 30, 2015
Is there a function / way to extract a word from a particular position in the String.
I want to extract a word which is in the 16th position. All words are separated by spaces.
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Jul 7, 2015
I am trying to compare the ADDRESS FIELDS Between 2 tables in SQL SERVER 2008. However when I run the comparisons below it throws the error below:
Query:
select
inner
JOIN TABLE2 B
ON
COLLOAN=
COLLOAN1
a.ADDRESS<>b.PropertyAdd
Error : Cannot resolve the collation conflict between "SQL_Latin1_General_Pref_CP437_CI_AS" and "SQL_Latin1_General_CP850_BIN" in the equal to operation.
WHERE
A.Address ,b.PropertyAdd
,a.*
from TABL1 A
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Nov 2, 2015
I want to extract two strings from xxxxx - yyyyyy separately as xxxxx and yyyyyy. The source always has two strings brought together with a - symbol. How to extract these two strings.
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Apr 20, 2015
I want to run an update command where the user types in a CSV value and the query runs. If I simulate 1 number it works, but if I put in 2 variable it returns nothing (but doesn't fail).
declare @SITE_ID int
declare @txtSchedule varchar (500)
set @SITE_ID=1
set @txtSchedule='5,6'
select * from Schedules WHERE SITE_ID=@SITE_ID and WEEK IN(@txtSchedule .
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Jul 28, 2015
I have below string, which is a datetime value
I want to convert it into datetime data type and insert into table
DECLARE @Date VARCHAR(100)
SET @Date='10312013122642'
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Jun 9, 2015
I have column with location for all reports, dashboards, images, pages in URL format from Sharepoint audit database. Like
sites/fm/finance/PowerPivot Gallery/FinancialStatement.rdlx
sites/ea/Mn_medical/Pages/Medical_DP/3 Site Compare.aspx
There are millions of rows like the above URLs. I need to separate all the strings from that ULR separated by "/" and make column for each so that I can create a hierarchy in tabular model. How do I write a sql for that. I could get first one and last ones with these kinds of substring:
SUBSTRING( b.DocLocation , LEN(b.DocLocation) - CHARINDEX('/',REVERSE(b.DocLocation)) + 2 , LEN(b.DocLocation) )
This gives me last piece of ULR. How I do I get all the middle pieces of URL?
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Jun 29, 2015
I wondered if it is possible to convert/transpose a list into a 1 row. I have attached a small sample of data and what outcome I would like.
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May 3, 2005
Ladies and Gentlemen,
I would like to offer you the following string functions Transact-SQL
GETWORDCOUNT() Counts the words in a string
GETWORDNUM() Returns a specified word from a string
AT() Returns the beginning numeric position of the first occurrence of a character expression within
another character expression, counting from the leftmost character
RAT() Returns the numeric position of the last (rightmost) occurrence of a character string within
another character string
OCCURS() Returns the number of times a character expression occurs within another character expression
PADL() Returns a string from an expression, padded with spaces or characters to a specified length on the left side
PADR() Returns a string from an expression, padded with spaces or characters to a specified length on the right side
PADC() Returns a string from an expression, padded with spaces or characters to a specified length on the both sides
PROPER() Returns from a character expression a string capitalized as appropriate for proper names
RCHARINDEX() Is similar to a built-in function Transact-SQL charindex but the search of which is on the right
ARABTOROMAN() Returns the character Roman number equivalent of a specified numeric expression
ROMANTOARAB() Returns the number equivalent of a specified character Roman number expression ...
More than 2000 people have already downloaded my functions. I hope you will find it useful as well.
For more information about string UDFs Transact-SQL please visit the
http://www.universalthread.com/wconnect/wc.dll?LevelExtreme~2,54,33,27115
Please, download the file
http://www.universalthread.com/wconnect/wc.dll?LevelExtreme~2,2,27115
With the best regards
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Nov 17, 2005
Ladies and Gentlemen,
I am pleased to offer, free of charge, the following string functions Transact-SQL:
AT(): Returns the beginning numeric position of the nth occurrence of a character expression within another character expression, counting from the leftmost character.
RAT(): Returns the numeric position of the last (rightmost) occurrence of a character string within another character string.
OCCURS(): Returns the number of times a character expression occurs within another character expression (including overlaps).
OCCURS2(): Returns the number of times a character expression occurs within another character expression (excluding overlaps).
PADL(): Returns a string from an expression, padded with spaces or characters to a specified length on the left side.
PADR(): Returns a string from an expression, padded with spaces or characters to a specified length on the right side.
PADC(): Returns a string from an expression, padded with spaces or characters to a specified length on the both sides.
CHRTRAN(): Replaces each character in a character expression that matches a character in a second character expression with the corresponding character in a third character expression.
STRTRAN(): Searches a character expression for occurrences of a second character expression, and then replaces each occurrence with a third character expression. Unlike a built-in function Replace, STRTRAN has three additional parameters.
STRFILTER(): Removes all characters from a string except those specified.
GETWORDCOUNT(): Counts the words in a string.
GETWORDNUM(): Returns a specified word from a string.
GETALLWORDS(): Inserts the words from a string into the table.
PROPER(): Returns from a character expression a string capitalized as appropriate for proper names.
RCHARINDEX(): Similar to the Transact-SQL function Charindex, with a Right search.
ARABTOROMAN(): Returns the character Roman numeral equivalent of a specified numeric expression (from 1 to 3999).
ROMANTOARAB(): Returns the number equivalent of a specified character Roman numeral expression (from I to MMMCMXCIX).
AT, PADL, PADR, CHRTRAN, PROPER: Similar to the Oracle functions PL/SQL INSTR, LPAD, RPAD, TRANSLATE, INITCAP.
Plus, there are CHM files in English, French, Spanish, German and Russian.
More than 6000 people have already downloaded my functions. I hope you will find them useful as well.
For more information about string UDFs Transact-SQL please visit the
http://www.universalthread.com/wconnect/wc.dll?LevelExtreme~2,54,33,27115
Please, download the file
http://www.universalthread.com/wconnect/wc.dll?LevelExtreme~2,2,27115
With the best regards.
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May 27, 2005
Ladies and Gentlemen,
I would like to offer you the following string functions Transact-SQL
GETWORDCOUNT() Counts the words in a string
GETWORDNUM() Returns a specified word from a string
AT() Returns the beginning numeric position of the first occurrence of a character expression within another character expression, counting from the leftmost character
RAT() Returns the numeric position of the last (rightmost) occurrence of a character string within another character string
CHRTRAN() Replaces each character in a character expression that matches a character in a second character expression with the corresponding character in a third character expression
STRFILTER() Removes all characters from a string except those specified
OCCURS() Returns the number of times a character expression occurs within another character expression (include overlaps)
PADL() Returns a string from an expression, padded with spaces or characters to a specified length on the left side
PADR() Returns a string from an expression, padded with spaces or characters to a specified length on the right side
PADC() Returns a string from an expression, padded with spaces or characters to a specified length on the both sides
PROPER() Returns from a character expression a string capitalized as appropriate for proper names
RCHARINDEX() Is similar to a built-in function Transact-SQL charindex but the search of which is on the right
ARABTOROMAN() Returns the character Roman number equivalent of a specified numeric expression (from 1 to 3999)
ROMANTOARAB() Returns the number equivalent of a specified character Roman number expression (from I to MMMCMXCIX)
AT, PADL, PADR, CHRTRAN, PROPER are similar to functions Oracle PL/SQL INSTR, LPAD, RPAD, TRANSLATE, INITCAP
More than 2000 people have already downloaded my functions. I hope you will find it useful as well.
For more information about string UDFs Transact-SQL please visit the
http://www.universalthread.com/wconnect/wc.dll?LevelExtreme~2,54,33,27115
Please, download the file
http://www.universalthread.com/wconnect/wc.dll?LevelExtreme~2,2,27115
With the best regards.
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Jun 3, 2005
Ya know...I don't think I would Ever be able to build those functions if I needed them.
http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=50370
You must be a very clever developer
Brett
8-)
Hint: Want your questions answered fast? Follow the direction in this link
http://weblogs.sqlteam.com/brettk/archive/2005/05/25/5276.aspx
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Jun 4, 2015
I have a query that pulls back task and user assigned. Each task can have multiple users assigned. I want to pull back the single task and all the users assigned in one row.
Current Query:
select
t.Name 'Task',
d.FirstName + d.LastName 'User'
from [dbo].[Tasks_TemplateAssignTo] a join
Task_Template t on a.template_id = t.ID join
Doctor d on d.id = a.provider_id
Results from query above:
TaskUser
Call CustomerJohn Smith
Call CustomerBetty White
Call CustomerTammy Johnson
Order suppliesGreg Bullard
Order suppliesJosephine Gonzalez
Expected Results:
TaskUser
Call CustomerJohn Smith, Betty White, Tammy Johnson
Order SuppliesGreg Bullard, Jospehine Gonzalez
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