Filling In Missing Values
Oct 29, 2004
I have a table that keeps track of click statistics for each one of my dealers.. I am creating graphs based on number of clicks that they received in a month, but if they didn't receive any in a certain month then it is left out..I know i have to do some outer join, but having trouble figuring exactly how..here is what i have:
select d.name, right(convert(varchar(25),s.stamp,105),7), isnull(count(1),0)
from tblstats s(nolock)
join tblDealer d(nolock)
on s.dealerid=d.id
where d.id=31
group by right(convert(varchar(25),s.stamp,105),7),d.name
order by 2 desc,3,1
this dealer had no clicks in april so this is what shows up:
joe blow 10-2004 567
joe blow 09-2004 269
joe blow 08-2004 66
joe blow 07-2004 30
joe blow 06-2004 8
joe blow 05-2004 5
joe blow 03-2004 9
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Oct 31, 2007
Hi,
I have the following table :
Code Block
Create table #Customers (custid int,name nvarchar(20),age int, st_code int,
citycode int, internalid int,type int,oldcustid int)
Insert into #Customers values(101,'Aron',23,1,1,12,1,0);
Insert into #Customers values(102,'Cathy',28,1,1,13,1,0);
Insert into #Customers values(103,'Zarog',33,1,1,14,1,0);
Insert into #Customers values(104,'Michale',25,1,2,12,1,0);
Insert into #Customers values(105,'Linda',43,1,2,13,1,0);
Insert into #Customers values(106,'Burt',53,1,2,14,1,0);
If you observe, the rows are unique based on the internalid per st_code,per city_code
Problem :
Now the user inserts another row but this time he passes only the following :
Insert into #Customer values(120,'AronNew',null,1,1,12,null,null) -
Note he doesnt pass the age or the type
I want that when he passes this row, i match up this row with the existing row based on st_code,citycode and internalid and then update the new row with the missing values(only columns with null) that were there in the existing row
OUTPUT
120,'AronNew',23,1,1,12,1,0
How could I write the query for this?
thanks.
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Mar 7, 2006
Hi,
I want to display some stats using captured information. the x-axis is the date on which something occured. the y-axis is the number of occurance on that day.
The problem is that the x-axis need to be of continous range, so say from 1st Mar 2006 to 8th Mar 2006, I need to display every date within that range.
I've gathered the neccessary stats with a group statement but I was hoping I can fill in the gaps without having to loop through the returned data to identify missing dates, is there any built int SQL Server function which will allow me to do this within my SELECT statement?
Cheers
james
`
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Sep 3, 2007
Filling a DataTable from SqlQuery : If SqlQuery returns some null values problem ocurrs with DataTable.
Is it possible using DataTable with some null values in it?
Thanks
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Jan 7, 2007
Hello all and a happy new year!
I used Microsoft clustering for grouping my data. Even though i already cleaned the data and have no null values i get one cluster with missing values in every attribute. (i set CLUSTER_COUNT=3 and i'm using Scalable k-means algorithm)
Does "missing" mean that the algorithm cannot group that particular tuple in another group so it consider it as missing?
Thank you in advance.
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Mar 7, 2008
I have two columns, where I have the start and stop numbers (and each of them ordered asc). I would like to get a query that will tell me the missing range.
For example, after the first row, the second row is now 2617 and 3775. However, I would like to know the missing values, i.e. 2297 for start and 2616 for stop and so on as we go down the series. Thanks in advance to any help provided!
StartStop
---------
20452296
26173775
568936948
3727084237
84409178779
179013179995
180278259121
259292306409
307617366511
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Nov 16, 2015
I have table with column having values 1,2,3,5,6,10.
I want to get the missing values in that column between 1 and 10 i.e., min and max... using sql query.
I want to get the values 4,7,8,9.
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May 16, 2008
I've got a field that might have spurious values in it (say, an admin adds a new row but doesn't have an entry for this field).
I'm trying to swap in the string no_image_EN.jpg if the value in the db does NOT end in .jpg. That way, any value rreturned is either a valid filename or no_image
I'm having trouble with the CASE statement, particularly testing just the last few cahracters of the string:
select product_code,
CASE can_image_en
?? When (can_image_en LIKE '%.jpg') then can_image_en
Else 'no_image_EN.jpg'
End as can_image_en,
none of these do the trick either (some are bad syntax obviously):
? When (can_image_en LIKE '%.jpg') then can_image_en
? When LIKE '.jpg' then can_image_en
? When '%.jpg' then can_image_en
? When right(can_image_en,4) = '%.jpg' then can_image_en This is the one that has correct syntax, though it seems to return false in ALL cases CASE can_image_en
When '%.jpg%' then can_image_en
Else 'no_image_EN.jpg'
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May 29, 2012
We are facing the following issue, several machines/users that are executing very often a command similar to :
INSERT INTO TableName (FieldOne,FieldTwo) VALUES ('ValueOne','ValueTwo');
SELECT SCOPE_IDENTITY() AS Table_ID;
Where TableName has a primary key defined as identity(1,1).and that Table_ID is being used as reference in others tables
These queries are executed using different dababase users and among several diffrent apps..The Problem is that we are detecting lost block of "Table_ID's" as the other tables shows the InsertedID as a reference, but the TableName table lacks of this ID record. In other words, the INSERT seems to work, the SCOPE_Identity returns an InsertedID, and the other tables are populated using this number. However, when we query the TableName table the mentioned record does not exist. We are profiling the server and we're sure that there are no DELETE statement on the TableName table. This seems to be happening when the are either deadlocks or blocked processes. Whenever the deadlocks and locks disappear/solved, everything works as expected.why the Scope_Identity returns the Inserted ID if the INSERT action had failed.
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Jan 15, 2013
KEYIDGROUP
1 1 a
2 1 b
3 2 a
4 2 b
5 3 a
6 3 b
7 4 a
8 5 a
This is my simple table I need a query that will identity the ID's that are missing the group "b" but I don't want ID 1,2,3 to come up because they are part of a and b. I just need to see anything missing only "b" but not if it's part of a and b.
query should reveal answer should be missing the group b
KEYID
7 4
8 5
I tried the NULL search but since the records don't exist it cant find a null. I am writing a query to identify the missing ID without B but exclude ID that are part of A and B
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Dec 13, 2007
I can't figure out how to get my line chart to break when there isn't a value. For example, I have a trend line over 4 time periods. The 3rd time period is missing a value. Instead of the line ending at the 2nd period and picking up again at the 4th time period, it's connecting the line 2nd to the 4th period. I'd like it to break and for there to be no line appearing in the 3rd period. I bet that's as clear as mud, but let me know if you have any questions.
Thanks!
sash
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Apr 27, 2015
Write the query that produces the below results. I'm not ale to join the two sets in a way so that it displays NULLs if no purchase was made on a given day for a particular product. I need NULLs or s so that it shows up correctly on my SSRS report.
-- declare @from DATE='2015-1-5',@to DATE='2015-1-10'
-- test data
;with testdata as(
SELECT 1 AS Id,'1/6/2014' AS Date, 21 As Amount UNION ALL
SELECT 1 ,'1/8/2014', 25 UNION ALL
SELECT 1 ,'1/9/2014', 30 UNION ALL
SELECT 1 ,'1/10/2014', 60 UNION ALL
SELECT 1 ,'1/5/2015', 3800 UNION ALL
SELECT 1 ,'1/6/2015', 7120 UNION ALL
[code]....
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Feb 8, 2007
Ok, so I must have screwed something up.
I have several databases set up for transactional replication to another instance of SQL Server 2005 for fail over purposes. Today, I restored one of those replicated databases to my development machine and discovered two surprising problems:
1) The Default Values settings in the replicated tables are missing. They are there in the publishing tables, just as they were before I set up replication. However, they are not in the subscribing tables. Now, this is not such a big issue, since I tend to send all default values in insert queries as necessary.
2) The second problem is a more of an issue, since I use auto-numbered Identity columns in my tables (yes, I know that's just plain lazy...). Anyway, in the replicated tables, €śIs Identity€? is indeed set to yes, but despite that fact that there are thousands of records with incrementally unique IDs, SQL server is trying to insert a record starting with 1. This, of course, throws a PK constraint error.
Obviously, if I am use them for failover purposes, these replicated databases need to be identical in every way.
So, what did I do to cause this situation, and how to I fix it?
Thanks a bunch!
md
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Jul 19, 2007
Hi, all,
Just really wonder what is the good idea to deal with missing values? Should we leave the missing values there in the traning data set ? Or replace it with other values?
What I am really concerned is that if we simply replace those missing values with other values, then how will it really affect the correctness of the training models?
I am looking forward to hearing from you for the above issue and it will be really great if we have any kind of best practices of dealing with this issue.
Thanks.
With best regards,
Yours sincerely,
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Jan 7, 2008
Hello,
I have the following query which grabs monthly usage data which is logged to a database table from a web page:
SELECT Button = CASE ButtonClicked
WHEN 1 THEN '1st Button'
WHEN 2 THEN '2nd Button'
WHEN 3 THEN '3rd Button'
WHEN 4 THEN '4th Button'
WHEN 5 THEN '5th Button'
WHEN 6 THEN '6th Button'
WHEN 7 THEN '7th Button'
WHEN 8 THEN '8th Button'
WHEN 9 THEN '9th Button'
ELSE 'TOTAL'
END,
COUNT(*) AS [Times Clicked]
FROM WebPageUsageLog (NOLOCK)
WHERE DateClicked BETWEEN @firstOfMonth AND @lastOfMonth
GROUP BY ButtonClicked WITH ROLLUP
ORDER BY ButtonClicked
The results look like this:
TOTAL 303
1st Button 53
2nd Button 177
3rd Button 10
4th Button 4
6th Button 18
7th Button 19
8th Button 21
9th Button 1
If a button is never clicked in a given month, it never gets logged to the table. In this example, the 5th button was not clicked during the month of December, so it does not appear in the results. I want to modify my query so it displays the name of the button and a zero (in this case "5th Button 0") in the results for any buttons that were not clicked. For some reason I am drawing a blank on how to do this. Thanks in advance.
-Dave
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Jun 2, 2015
I'm trying to swap out old partitions and getting "An error occurred while processing 'AltFile' metadata for database id 12 file id 605" 605 is missing from sys.sysfiles. I've tried adding new file groups since it seemed to be assigning them in that range to allow the command to find a match. Once created and I issue the alter command the file id of the target file changes to something else in the missing range.
The file id values seem to be managed solely by sqlserver so I'm not sure what to try. There are hundreds of files with millions of rows and the method has been used problem free for years. I do occasionally get "unable to remove file because it's not empty" once in a while which may be related. I wind up having to shrink those and leave them in existence.
The target file group has an existing file id value when you join sys.sysfiles using the filegroup name.
I partition data in 2 tables on one filegroup per day. I swap out parition 1 each day which makes the new earliest day's partition the new partition 1. Different databases have different day ranges depending on requirements.
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Sep 18, 2006
Q1. Model Prediction -- Suppose we already have a trained Microsoft Linear Regression Mining Model, say, target y regressed on two variables:
x1 and x2, where y, x1, x2 are of datatype Float. We try to perform Model Prediction with an Input Table in which some records consist of NULL x2 values. How are the resulting predicted y values calculated?
My guess:
The resulting linear regression formula is in the form:
y = constant + coeff1 * (x1 - avg_x1) + coeff2 * (x2 - avg_x2)
where avg_x1 is the average of x1 in the training set, and avg_x2 is the average of x2 in the training set (Correct?).
I guess that for some variable being NULL in the Input Table, Microsoft Linear Regression just treat it as the average of that variable in the training set.
So for x2 being NULL, the whole term coeff2 * (x2 - avg_x2) just disappear, as it is zero if we substitute x2 with its average value.
Is this correct?
Q2. Model Training -- Using the above example that y regressed on x1 and x2, if we have a train set that, say, consist of 100 records in which
y: no NULL value
x1: no NULL value
x2: 70 records out of 100 records are NULL
Can someone help explain the mathematical procedure or algorithm that produce coeff1 and coeff2?
In particular, how is the information in the "partial records" used in the regression to contribute to coeff1 and the constant, etc ?
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Sep 18, 2006
Q1. Model Prediction -- Suppose we already have a trained Microsoft Linear Regression Mining Model, say, target y regressed on two variables:
x1 and x2, where y, x1, x2 are of datatype Float. We try to perform Model Prediction with an Input Table in which some records consist of NULL x2 values. How are the resulting predicted y values calculated?
My guess:
The resulting linear regression formula is in the form:
y = constant + coeff1 * (x1 - avg_x1) + coeff2 * (x2 - avg_x2)
where avg_x1 is the average of x1 in the training set, and avg_x2 is the average of x2 in the training set (Correct?).
I guess that for some variable being NULL in the Input Table, Microsoft Linear Regression just treat it as the average of that variable in the training set.
So for x2 being NULL, the whole term coeff2 * (x2 - avg_x2) just disappear, as it is zero if we substitute x2 with its average value.
Is this correct?
Q2. Model Training -- Using the above example that y regressed on x1 and x2, if we have a train set that, say, consist of 100 records in which
y: no NULL value
x1: no NULL value
x2: 70 records out of 100 records are NULL
Can soemone help explain the mathematical procedure or algorithm that produce coeff1 and coeff2?
In particular, how is the information in the "partial records" used in the regression to contribute to coeff1 and the constant, etc ?
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Jul 9, 2007
Hi,
I'm inserting a datetime values into sql server 2000 from c#
SQL server table details
Table nameate_test
columnname datatype
No int
date_t DateTime
C# coding
SqlConnection connectionToDatabase = new SqlConnection("Data Source=.\SQLEXPRESS;Initial Catalog=testdb;Integrated Security=SSPI");
connectionToDatabase.Open();
DataTable dt1 = new DataTable();
dt1.Columns.Add("no",typeof(System.Int16));
dt1.Columns.Add("date_t", typeof(System.DateTime));
DataRow dr = dt1.NewRow();
dr["no"] = 1;
dr["date_t"] = DateTime.Now;
dt1.Rows.Add(dr);
for(int i=0;i<dt1.Rows.Count;i++)
{
string str=dt1.Rows["no"].ToString();
DateTime dt=(DateTime)dt1.Rows["date_t"];
string insertQuery = "insert into date_test values(" + str + ",'" + dt + "')";
SqlCommand cmd = new SqlCommand(insertQuery, connectionToDatabase);
cmd.ExecuteNonQuery();
MessageBox.Show("saved");
}
When I run the above code, data is inserted into the table
The value in the date_t column is 2007-07-09 22:10:11 000.The milliseconds value is always 000 only.I need the millisecond values also in date_t column.
Is there any conversion needed for millisecond values?
thanks,
Mani
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Nov 1, 2004
Hello All
I am wanting to fill a drop down list in ASP.NET using C# from a SQL database table using a stored procedure. I have my Sproc. But using ASP.NET C# I have no idea how to do this. Can someone give me a good example, and if not too much trouble, place comments in the code, and give an explanation. I am just learning ASP.NET after moving from Classic. Things are alot different.
Thank You in advnace for all your help
Andrew
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Mar 21, 2008
I have a ton of data to load into a SQL 2005 database.
I just loaded a bunch of data for a number of tables using bcp, and the last table that my script loaded was an 8 million row table. The next table was a 12 million row table, and about 1 million rows into the bcp'ing a log full error was incurred. I have the batch size set to 10000 for all bcp commnads.
Here is the bcp command that failed:
"C:Program FilesMicrosoft SQL Server80ToolsBinncp" billing_data_repository..mtr_rdng_hrly_arc_t in mtr_rdng_hrly_arc_t.dat -c
-b10000 -Sxxxx -T
Here is the last part of the output from the bcp command:
...
10000 rows sent to SQL Server. Total sent: 970000
10000 rows sent to SQL Server. Total sent: 980000
10000 rows sent to SQL Server. Total sent: 990000
SQLState = 37000, NativeError = 9002
Error = [Microsoft][ODBC SQL Server Driver][SQL Server]The transaction log for database 'billing_data_repository' is full. To find out why space in the log cannot be reused, see the log_reuse_wait_desc column in sys.databases
BCP copy in failed
I thought that a commit was issued after every 10000 rows and that this would keep the log from filling up.
The log_reuse_wait_desc column in sys.databases is set to 'LOG_BACKUP' for the database being used.
Does a checkpoint need to be done more often?
Besides breaking up the 12 million row data file into something more manageable, does anyone have a solution?
How can I continue to use my same loading script, and keep the log from filling up?
Thank you.
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Feb 27, 2007
I have a class that works fine using the SQLDataReader but when I try and duplicate the process using a Dataset instead of a SQLDataReader it returnsa a null value.
This is the code for the Method to return a datareader
publicSqlDataReader GetOrgID()
{
Singleton s1 = Singleton.Instance();
Guid uuid;
uuid = new Guid(s1.User_id);
SqlConnection con = new SqlConnection(conString);
string selectString = "Select OrgID From aspnet_OrgNames Where UserID = @UserID";
SqlCommand cmd = new SqlCommand(selectString, con);
cmd.Parameters.Add("@UserID", SqlDbType.UniqueIdentifier, 16).Value = uuid;
con.Open();
SqlDataReader dtr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return dtr;
This is the code trying to accomplish the same thing with a Dataset instead.
public DataSet organID(DataSet dataset)
{
Singleton s1 = Singleton.Instance();
Guid uuid;
uuid = new Guid(s1.User_id);
string queryString = "Select OrgID From aspnet_OrgNames Where UserID = @UserID";
SqlConnection con = new SqlConnection(conString);
SqlCommand cmd = new SqlCommand(queryString, con);
cmd.Parameters.Add("@UserID", SqlDbType.UniqueIdentifier, 16).Value = uuid;
SqlDataAdapter adapter = new SqlDataAdapter();
adapter.SelectCommand = cmd;
adapter.Fill(dataset);
return dataset;
}
Assume that the conString is set to a valid connection string. The Singlton passes the userid in from some code in the code behind page ...this functionality works as well.
So assume that the Guid is a valid entry..I should return a valid dataset but its null.
Additionally if I change the sql query to just be Select * From aspnet_OrgNames I still get a null value...I am assuming I am doing something wrong trying to fill the dataset.
Any help would be appreciated.
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Jan 14, 2000
MS SQL Enterprise Server, SP5, running under version 6.5.
I have recently been having a problem with the TempDb database
filling up. I originally started the database at 250 Mb but
recently expanded it to 500 Mb.
My last check of the activity on the server during an event
such as this produced the following information.
- Approx. 300 connections to primarily 2 databases.
- 4 active connections:
Connection 1 -SELECT on database 1 with 13,000 records
and a record size of approx. 300 bytes.
Connection 2 -SELECT on database 1 with 13,000 records
and a record size of approx. 300 bytes.
Connection 3 -SELECT on database 2 with 550 records
and a record size of approx. 100 bytes.
Connection 4 -Replication subscriber set at 100 transactions.
My questions are:
1. What processes may cause the TempDb database to fill up?
2. What processes prevent the database from purging?
Any information would be greatly appreciated.
Jim Story
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Nov 2, 1999
We are having continual problems with our transaction log filling up on one of our major applications.
Does anyone know of a way or tool to read the transaction log? We want to determine what is causing this problem.
Thanks
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May 4, 1999
Recently, we converted an Access database to SQL server 6.5. One of the processes that runs against the server is
missing a commit causing temporary stored procedures to fill up TEMPDB in the sysobjects table. The only way to
clear up TEMPDB is to stop and start SQL server when the database fills up. I wrote a quick and dirty stored
procedure to delete the affending rows out of the tempdb..sysobjects table, however, the database still registers as
full after the deletes.
Question:
does anyone know of a process/DBCC I can run against the tempdb..sysobjects table to regain the space in TEMPDB
without having to stop and restart SQL Server? I need a temporary solution while the programmer is debugging the
affending code.
Thanks!
TC
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Dec 5, 1998
hello,
I've got replication set up as a publisher subscriber, to basically sync a primary server with a
backup server. My distribution log keeps filling up, I've got a perf alert for now to truncate it
at 75% full for now, but why does it fill up? it's size is about 1.5 gig
My tran log for my database will also not remove about 500mb of data as well, is there any way to
see what is going on?
Thanks
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Aug 2, 2007
hello, i'd need a little help with filling GridViewsi browsed over like 10 search pages, but couldnt find any which would solve my problem.so in my ajax project i made a testing page pulled a gridview (GridView1) on it with a fhew buttons and textboxes.i need to fill the gv from code so my websie.asp.cs looks like this 1 protected void Page_Load(object sender, EventArgs e)2 {3 4 5 string connstr = "Data Source=.;database=teszt;user id=user;password=pass";6 SqlConnection conn = new SqlConnection(connstr);7 SqlCommand comm = new SqlCommand("select * from users", conn);8 conn.Open();9 SqlDataReader reader;10 reader = comm.ExecuteReader();11 if (reader.HasRows)12 {13 GridView1.DataSource = reader;14 GridView1.DataBind();15 }16 reader.Close();17 conn.Close();18 comm.Dispose();19 } so i load the page and there's no gridview on the page at all, nor an error msg, the connection and the database/table is fine.any suggestions on what am i doing wrong? and i also like to know if there would be any problem with using this on a tabcontrol/tabthankyou
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Apr 9, 2008
hello everyone
i have created a table in sqlserver2005 named "Departments" - in this table different departments of a telephone ( landline ) company are to be stored,which deals with complaints registered to them by there users.
i want to know the name of these different departments which deals with complaints assigned to them like if i do have complaint from a user who has problem with his handset then that complaint will be assigned to "Maintance dept."
as i was never in indusrty , i need the help in filling the table.
just do write me name of departments and the nature of complaints wh they deal with!!!
thanks for the consideration
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Oct 2, 2000
I have complex VB code that loads millions of records into a SQL 7 database. I see my tempdb slowly growing until system runs out of disk space.
What are typical programming bugs that would cause tempdb to fill up,
and how can I identify the offending statements through profiler?
Any help greatly appreciated!
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Dec 28, 2006
What is the best way to fix issues with your log files in TempDB when you start to see them causing error msgs?
Thansk for your time.
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Aug 2, 2001
We have a stored procedure that uses temp tables and must gather a lot of data. When we stress test this stored procedure, the tempdb transaction log fills up.
We tried using "Select Into" for our tables. That caused us not to write to the transaction log but it caused problems because it locked up sysobjects.
Is there some other way not to write to the transaction log?
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Aug 13, 2002
I have a database that I am splitting the data using odd account numbers and even account numbers. The odd acct numbers in one database and the even in the other database.
This database is very large. The problem is when I run the delete statements
it is going to fill up the log files. Can I turn on the "Simple" mode on the database while I am deleteing the data. Will this cause a problem? Then can I turn back on the 'Full' mode when I have finished?
Has anyone ever done this and so how did it work. Or better yet is it possible?
Thanks,
Dianne
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Feb 26, 2007
Hello,
I am new to SQL Server and learning lots very quickly! I am experienced at building databases in Access and using VBA in Access and Excel.
I have a time series of 1440 records that may have some gaps in it. I need to check the time series for gaps and then fill these or reject the time series.
The criteria for accepting and rejecting is a user defined number of time steps from 1 to 10. For example, if the user sets the maximum gap as 5 time steps and a gap has 5 or less then I simply want to lineraly interpolate betwen the two timesteps bounding the gap. If the gap is 6 time steps then I will reject the timeseries.
I have searched the BOL and MSDN for SQL Server and think there must be a solution using the PredictTimeSeries in DMX, but not quite sure if I can do this. I may be better off simply passing through the time series as a recordset and processing as I would have done in Access...(I am reluctant to do this as I have of the order 100 * 5 * 365 time series and growng by 100 each day and fear it will take quite some time...)
Can anyone help me by pointing me in the right direction please?
Unless there is a way of using PredictTimeSeries on its own, I think the solution is:
Identify if a record is the a valid one or part of a gap (ie missing values).
Identify the longest gap and reject or process data on this value.
Identify if a record preceedes or succeeds a gap.
For each gap fill it using a linear interpolation.
Thanks,
Alan.
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