To Split Or Not To Split
May 9, 2007
I have a database with a "large" table containing date based information Basically they're reservations. I've thought about creating a new table and adding any records from past years to this table. For the most part only current reservation need to be searchable, but in some circumstances it would be useful to be able to search through the archive too. so, my questions!!!
Is 8,000 or so rows of data "large" and unwieldly in SQL terms?
Would splitting this data into 2 tables - one small table for current and future reservations and one larger archive table then using a UNION SELECT query to make archive information seachable be a significant improvment on server resources/load or am I making the whole thing more complicated than it need be as 8,000 rows of data is nothing to worry about.............
What did they say about a little bit of knowledge being a dangerous thing?
Thanks in advance of any guidance to a neophyte!!?
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Feb 16, 2005
Quick question.
I've got a CHAR (70) field called NAME that has a first and last name separated by a space. I want to split it into two fields FIRST and LAST -- with all the characters to the left of the space a first name and all the characters to the right of the space as last name. I couldn't find a string function that would let me do this simply (it may be right in front of me and I missed it).
Thanks in advance.
Ray
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Jul 14, 2007
Hi to all
I have one problem regarding sp and pass value in sp
I am gating a value like Abc,Def,Ghi,
Now I want to split the whole pass value by “,�
And fire one for loop to store value in database
This things is done in asp.net web form but I want to do all process in sp
So please guide me how I am write sp .
The purpose is pass value one time so connection time is decrees and give fast perforce
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Jan 8, 2008
SQL UDF split()
The objective of this article is to help the SQL developers with an UDF that can be used within a stored procedures or Function to split a string (based on given delimiter) and extract the required portion of the string.
Scripting languages like VB script and Java script have in-built split() functions but there is no such function available in SQL server. In my experience this function is really handy when you’re working on an ASP application with SQL server as backend, whereby you’ll need to pass the ASP page submitted values to the SQL stored procedure.
To give a simple example, in a typical Monthly reporting ASP page – the users would select a range of months and extract the information pertaining to this date range. Classic implementation of this model is to have an ASP page to accept the input parameters and pass the values to the SQL stored procedure (SP). The SP would return a result set which is then formatted in the ASP page as results.
If the date range is continuous ie. JAN07 to MAR07 then the SP can typically accept a ‘From’ and ‘To’ range variables. But I’ve encountered situations whereby the users select 3 months from the current year and 2 months from previous year (non-continuous date ranges). In such scenario the SP cannot have a date range as input parameters.
Typically an ASP programmer would do is by having a single date input parameter in the SP and call the SP within a loop in the ASP page. This is an inefficient way of programming as contacting the database server within an ASP loop could cause performance overhead especially if the table being queried is an online transaction processing table.
Here is how I handled the above situation.
1.Declared one string input parameter of type varchar(8000) (if you’re using SQL 2005 then it is advisable to use Varchar(Max))
2.Pass the ASP submitted values as string, in this case the months selected by user would be supplied to the SP as a string
3.Within the Stored Procedure I’ll call the split() function to extract each month from the string and query the corresponding data
The basic structure of the stored procedure is as pasted below:-
CREATE PROCEDURE FETCH_SALES_DETAIL (
@MONTH VARCHAR(MAX)
)
AS
BEGIN
DECLARE @MONTH_CNT INT,@MTH DATETIME
SET @MONTH_CNT=1
WHILE DBO.SPLIT(@MONTH,',',@MONTH_CNT) <> ''
BEGIN
SET @MTH = CAST(DBO.SPLIT(@MONTH,',',@MONTH_CNT) AS DATETIME)
--<<Application specific T-SQLs>>-- (BEGIN)
SELECT [SALES_MONTH],[SALES_QTY],[PRODUCT_ID],[TRANSACTION_DATE]
FROM SALES (NLOCK)
WHERE [SALES_MONTH]= @MTH
--<<Application specific T-SQLs>>--(END)
SET @MONTH_CNT=@MONTH_CNT+1
END
END
Dbo.SPLIT() function takes 3 parameters
1)The main string with the values to be split
2)The delimiter
3)The Nth occurrence of the string to be returned
The functionality of the UDF is as explained STEP by STEP:
1.Function Declaration
CREATE FUNCTION [dbo].[SPLIT]
(
@nstring VARCHAR(MAX),
@deliminator nvarchar(10),
@index int
)
RETURNS VARCHAR(MAX)
Function is declared with 3 input parameters:-
@nstring of type VARCHAR(MAX) will hold the main string to be split
@deliminator of type NVARCHAR(10) will hold the delimiter
@index of type INT will hold the index of the string to be returned
2.Variable Declaration
DECLARE @position int
DECLARE @ustr VARCHAR(MAX)
DECLARE @pcnt int
Three variables are needed within the function. @position is an integer variable that will be used to traverse along the main string. @ustr will store the string to be returned and the @pcnt integer variable to check the index of the delimiter.
3.Variable initialization
SET @position = 1
SET @pcnt = 1
SELECT @ustr = ''
Initialize the variables
4.Main functionality
WHILE @position <= DATALENGTH(@nstring) and @pcnt <= @index
BEGIN
IF SUBSTRING(@nstring, @position, 1) <> @deliminator BEGIN
IF @pcnt = @index BEGIN
SET @ustr = @ustr + CAST(SUBSTRING(@nstring, @position, 1) AS nvarchar)
END
SET @position = @position + 1
END
ELSE BEGIN
SET @position = @position + 1
SET @pcnt = @pcnt + 1
END
END
4.1The main while loop is used to traverse through the main string until the word index is less than or equal to the index passed as input parameter.
4.2Within the while loop each character within the string is verified against the delimiter and if it does not match then local word count variable is checked against the input index parameter
4.3If the values are same ie., the input variable index and the word being processed in the while loop are the same then the word is stored in the @ustr variable. If the values does not match then the @position variable is incremented.
4.4If the character matches with the delimiter then the word count variable @pcnt is incremented along with the @position variable
5.Return the value
RETURN @ustr
I hope this article would benefit those who are looking for a handy function to deal with Strings.
Feel free to send your feedback at dearhari@gmail.com
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Feb 4, 2008
I have 5 dynamic rows each row consisting of 5 checkboxes & 5 dropdowns.I am concatenating the values of each controls in a row using a wildcard charater "~" and each row i am concatenating using "|".The complete string is then assigned to one hidden field and passed as sql parameter to the backend.
Please help in writing the split function to get the values of each checkboxes and dropdowns from the string in order to save them in separate columns.
Thanks
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Jan 28, 2004
Hi,
Is it possible to split the following value in sql server ?
I have the value like 25 Email Accounts,50 Email Accounts in my sqlserver database.
Here i need only the numeric value .ie 25,50.Is it possible? can any one give me the solution ..
I am using ASP.Net and C# backend is SQL Server 2000.
Thanks and Regards
Arul
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Oct 17, 2005
CREATE PROCEDURE [dbo].[ShowComboLocation]@Keyword varchar(50) ASSELECT TOP 100 PERCENT PropertyAreaID, PropertyAreaFROM dbo.iViewAllWHERE (PropertyArea LIKE '%' + @Keyword + '%')GOQuestion 1 isIf Keyword ="London WestEnd Harrods", I know my query will end up like this (PropertyArea LIKE 'London WestEnd Harrods')But I want to to individually search for 3 or 1-nth words therefore my query should end up like this(PropertyArea LIKE 'London')OR (PropertyArea LIKE 'WestEnd')OR (PropertyArea LIKE 'Harrods')i WANT TO perform this on my SQL STored Procedure,Can anybody provide code or links pls
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Mar 21, 2001
I have a procedure that is going to be called through asp pages. This procedure carries out instructions depending on whether customers wants to insert, update or delete their portfolios. Rules are as follows: 1. It should not allow duplicate portfolio name to insert. 2. If customer has reached their max limit of 20 portfolio they can't add. They may have to delete or update the existing portfolio first. 3. all the error handling is done and returned as output parameters.
Now coming to the question at present I have one procedure that does all these things. Should I split up the procedure and have three procedures handling the events seperately: 1 Insert 2 Delete 3 update The reason I am concerned is 1 procedure being hit so many times by concurrent users with varying events. I am concerned about performance issue and slowing down of the page. I do not have exact numbers of users at this point. But they would be in thousands or more. Thanks for any suggestions or advice you all might have to share. Hiku
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Mar 22, 2001
I want to know how to parse a fullname into a fname and lname.
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Sep 19, 2002
What I have is a table with a primary key. Then I have 5 other tables with a relating key. No problems there.
I need to create a relationship with the primary table (primary) key who's data field is 25 charachters. I need to parse that out and have 3 charachters go to one, 2 to the other and so on.
I don't know how to do that, can you help?
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Nov 28, 2002
Hi I need a stored procedure in SQL that will split a comma separated variable passed to it
select a name for each value and return a recordset. Any pointers greatfully received.
First attempt is dreadfully slow as I am opening recordsets each time
Function func_getFood()
Dim rsfoodsql
Dim foodoutput
for x=1 to ubound(masterfoodarray)-2
set rsfoodsql= objconn.execute ("select foodname from tbl"&language&"food where foodID='"& masterfoodarray(x) &"'")
if not rsfoodsql.eof then
foodoutput=rsfoodsql("foodname")
if not foodoutput="" then
response.write foodoutput&"<BR>"
end if
end if
next
End Function
Hope someone can help,
cheers
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Nov 4, 2004
Hi everybody
Does any body know how to split a field in a table into two fields
eg
usermaster(table)
userid(field)
usermaster has 40 users with user id 1 to 40
i want to get data as
userid userid
1 21
2 22
3 23
. .
. .
. .
20 40
Thanks you very much
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Sep 27, 2005
I have a large table that I'm planning on splitting out into 5 smaller ones. What I need to do is maintain some central repository for auto-numbering new records to make sure that no 2 records in different tables have the same unique ID. Thanks in advance!
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Oct 29, 2007
Hi
I have this string which might have a hyphen in it "-"
What I want to do is
if I get a hyphen then take all characters after hyphen
else take only all the characters starting from the 5th position of the string
How can this be achieved?
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Mar 14, 2014
following is the base table
create table #sample (id int , value varchar(100))
insert into #sample values (1,'aaa,bbb')
insert into #sample values (2,'ccc,ddd')
insert into #sample values (3,'aab')
& i need the attached output
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Dec 17, 2014
So I would like to split rows in my query based on if they match criteria and I really havent dealt with splitting in SQL only combining(which is usually what everybody does lol)
So for instance my query results is this
SOPNUMBER TAX TOTAL
14-123456 $500.00
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Apr 7, 2008
Hi
I have tried like this. but I cant execute my SP it ended up with errors.
IF (@FirstLetters IS NOT NULL)
BEGIN
SET @FirstLetter = 'SELECT SplitValue FROM dbo.FnSplitString('+@FirstLetters+','',''))'
print @FirstLetter
END
SELECT
P.PUB_ID AS ''PubId'',
P.PUB_TITLE AS ''PubTitle''
FROM HDS_PUBLICATION P
INNER JOIN HN_IM_JOIN IM
ON IM.PUB_UNID = P.PUB_UNID,
HDS_CUSTOM C,
WD_PUBLIC_SHELF S,
HDS_TOPIC T
WHERE P.PUB_UNID = C.PUB_UNID AND C.CUSTOM3 = ''False''
AND P.PUB_ID = S.PUB_ID
AND P.PUB_UNID = T.PUB_UNID
AND S.Audience = ''Public''
' + @FilterByLang + '
ANDP.PUB_TITLE LIKE '+ @FirstLetter +'''%''' +'
EXEC SP
Any one please clear me
Thanks,
shakthiA
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Jun 4, 2008
I am having City, State i need to split these two string with comma separated and to search based on the city and state how to write the select query
any one know help me
Regards,
Prabu R
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Jun 4, 2008
I have the following:
iddocidgroupidOption
48986111235
353973334
2314820112346
would like to see this result:
iddocidgroupidOption
48986111
48986112
48986113
48986115
35397333
35397334
231482011
231482012
231482013
231482014
231482016
thanks you
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Sep 7, 2013
A#B#C
A#B
A#B#C#D
How do I split above value in columns by "#"?
I need output:
Column1 Column2 Column3 Column4
A B C
A B
A B C D
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Apr 8, 2015
I have data like 'US.USA.Florida.Miami'. I need to split this string as below
Continent Country State Location
=========== ========= ========= ============
US USA Florida Miami
Delimiter is dot '.'.
Is there any chance to do this using the sql server built in functions.
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Nov 3, 2006
hai friends,
please help me.Here is my doubt
In a table I have fields like this TABLE NAME : table1
COLUMN NAME : ids
----------------
ids
-----------------
1,3,4
3,4
3
7,1
1
11
6
6,7
1
i want to get all the ids used i.e., 1,2,3,6,7,11
i want to update another table based on the id, which are not listed here.
I am doing like below
declare @IDs varchar(200)
select IDs=ids from table1
update table where(id not in(select ID from timeSplitter(@IDs)))
please help me.it is urgent
thanks in advance
bye
pavansagar
pavansagar
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Mar 21, 2007
My company use SQL server 2005 standard. considering deal with huge data, how if we want to split data (date range yearly or monthly) in order to ease transaction. that's simply for us to use query, but how if we want to split data that can be easily execute by operator (non-admin privilege). Is there any another way?
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Aug 21, 2007
not sure if this is possible...
but lets say i make a select like
select products, stock from table
and my rs is
chair | 1
couch | 3
lamp | 2
is there anyway in the select to make any row that has stock of more than 1 to make a new row... so my rs would come back as
chair
couch
couch
couch
lamp
lamp
Any info would be helpful...
Thanks,
~ moe
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Feb 21, 2008
hi,
how can i split text separated by semicolumn in different cells:
text1;text2;text3;
into
1 - text1
2 - text2
3 - text3
thank you
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Jul 23, 2005
Whats the best way to do the following?Field1 in Table1 contains numbers and characters seperated by #Examples: aaa#01, kjhkjhjh#21 and jlkjlkj#123How can I create two new fields in Table1, one containing what is tothe left of the # and the other what is to the right?Regards,Ciarán
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Aug 21, 2006
Is there any split function in sql server 2005. I just want to pass a string to a stored procedure. it should split that string when it encounters a space. for ex, consider the string " the intel mother board" it should give "the,intel,mother,board" as result.
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Oct 24, 2007
Hello Group
Can somebody guide me on the prefered standards of doing this
I have a Colunm in a table having both NULLS and some data
Ex:
Table 1
Col1 Col2
--------------------------
1 MSDN
2 Forum
3 NULL
4 NULL
5 Condition
6 Split
7 NULL
I want to move the data from this tabel to two different table depending upon the value in Col2
Table2
Col1 Col2
--------------------------
1 MSDN
2 Forum
5 Condition
6 Split
Table 3
Col1 Col2
--------------------------
3 NULL
4 NULL
7 NULL
For doing this I used a simple Conditional Split Task after table 1
First Approach
Output Name; Null Data Condition: ISNULL(Col2)
I routed the output Null Data to Table3 and the default to Table2.
Strangely I see some data in Table3 which is not NULL. That is Table 3 is having a data which is not equal to null in Col2.
I have no clue why will it do that.
Second approach
Output Name: Data, Condition: !(ISNULL(Col2))
I routed the output: Data to Table2 and the default to Table3.
Strangely I see some data in Table3 which is not NULL. That is Table 3 is having a data which is not equal to null in Col2.
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Mar 17, 2006
how can I tell the conditional component to split the records based on change of hdr_HeaderID
http://www.webfound.net/split_on_headerid.jpg
let me know if you need more info...
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Nov 5, 2007
I have a oledb source and destination in a data flow task..
I would like to put the records where customer_key is null to an error table
and rest of records to a destination table ( customers) using conditional split task..
how can i do this?
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Aug 23, 2007
I am using a conditional split to evaluate the condition below. It should only send records to my SQL Server database if the PatientZip matches one of the eight below and the PatientCity is not Wichita Falls (you wouldn't believe how bad this is mispelled sometimes). I checked the output table and it has all records for the zipcodes below both matching and non-matching the cityname of Wichita Falls. The table should not have entries for records with the cityname of Wichita Falls. Do I have the code correct or could I have missed something?
LTRIM(PatientCity) != "Wichita Falls" && (PatientZip == "76301" || PatientZip == "76302" || PatientZip == "76305" || PatientZip == "76306" || PatientZip == "76307" || PatientZip == "76308" || PatientZip == "76309" || PatientZip == "76310")
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Oct 16, 2006
my ssis package downloades the text file from Ftp. iT downloades for ex 5 files.
I want to split the file to smaller file after downloades. If the size of file is more then 600 mB then I want to split it into 6 files.
please suggest if any task in SSIS can perform this or any other way.
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Jul 23, 2007
I'm converting our companies binary file data to SQL Server data. I'm a developer, not a dba, and can't seem to get my company to hire a dba, so I need some advice from the community. I have an application running right now, it looks like it will take a week to run. Here's my estimates of the database size once it 's finished being loaded:
Database Size: 20 Gig
Largest Table (# of rows): 15 million rows
Number of Tables: 37
Other Details: I'm going to use Web Merge Replication to replicate filtered data to 500 customers.
QUESTION:
At what point do I need to consider splitting the database up onto multiple servers?
Or, is it better to split up the database into multiple databases on one server?
Someone suggested to me to split up each customers data into a separate database on the server (i.e. ~500 databases). Is this an accepted practice?
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