Transact SQL :: How To Purge Data From A Table
Nov 4, 2015
We have staging table in which data is dumped from files . The staging table is truncated for every load . In order to retain data from staging table we are creating staging_purge table which hold the staging data. what is the fastest way to copy data from staging to purge table without impacting the load process.
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Aug 18, 2015
How to purge data in transaction table or we can delete some data and store in separate table in data warehouse?
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May 14, 2007
Hi all I have table with about 67 million records
that are marked for deletion.
I know that I can
DELETE from table
WHERE ToBeDeleted='t'
But this may be too big a task for the server considering the amount
of data to delete at once. And if it runs out of resources and errors then nothing gets deleted....
Is there a way to segmant or loop so i can delete like 100k records at a time?
Many thanks in advance
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May 21, 2007
greets all, ive got a table with batches of records. each group of records has a batch id as part of the PK in the form BTCXXXX where XXXX is an auto-incremented number. so lets say i have 100 batches of 20k records per batch in the table. so the distinct batch ids are BTC0200 (oldest batch) through BTC0300 (newest batch).
i only want to keep the 90 most recent batches in the table at any given time.
is it ok to just subtract 90 from the last batch id and do something like:
DECLARE @batch_id char(10)
SET @batch_id = 'BTC' + batch_num-90
DELETE FROM ITEM_BATCH
WHERE BATCH_ID < @batch_id
i want to cover if the table has more than 90 batches and if the table has less then 90 batches. is this a feasible approach?
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Dec 14, 2006
Hi,
Not sure if this question makes sense, but is it necessary to purge old data in msdb tables used by the db mirroring monitor job?
I'm just wondering if an insert into the data table every minute of the day would still be needed a month from now. I'm thinking this data would be useful for the purpose of "alerts" and to have access to its recent history, but other than that, is it recommended (or necessary)? Would these records keep accumulating until manually purged?
TIA.
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Jan 25, 2007
Hello,
I have a database that I am setting up in SQL Server 2005. Initially, I am doing very large imports of data. Every time I run an import, I am having the increase the size of my transaction logs, and now they are approaching 2 GB. Should these be purging themselves? I have to keep increasing the max size of the log so that I can get my data in. While this will work for now, it is not a long term solution, because I can see the log size growing quite large and the amount of space on the server obviously isn't infinite. Is there a setting that I can change so they will automatically purge? If not, how do I purge this information myself?
Thanks so much!
Christine
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Jul 23, 2002
Hello all,
I hope someone can help me with a big problem... I'm using Citrix Resource Management Services with a SQL 2000 database. Their are 15 citrix servers which are all reporting to the SQL database.
The database is expanding very quickly and is becoming slower and slower.
My question is: I want to schedule a purge of old records on a friday afternoon, like this:
WEEK 1 - MON / FRI
WEEK 2 - MON / FRI (Friday's purge records week1)
WEEK 3 - MON / FRI (Friday's purge records week2)
etc...
Is this possible? if yes how do i do this !??!
Thank you very much for any info!!
Daan
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Jan 9, 2014
I am attempting to do a rather simple purge task on a very large table. This task will need to take place daily and delete records older than 6 months out of the database. On first pass this will delete well over 130 million rows. I thought the best way to handle this is create a proc and call the proc from a SQL Agent Job that runs nightly. Here is an example of the script:
CREATE PROCEDURE usp_Purge_WCFLogger
AS
SET NOCOUNT ON
EXEC sp_rename 'dbo.logs', 'logs_work'
GO
SELECT * INTO dbo.Logs_Backup FROM dbo.Logs_Work WHERE TIMESTAMP < DATEADD(month, -6, GETDATE())
[Code] .....
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Jan 28, 2008
I've got a large MS Sql Server 2000 database that has 15 indexes, with roughly 180 million rows representing 240 GB worth of data. Due to the massive size of the database we are trying to purge it down to a smaller dataset, about 40 million rows, in order to speed up the query performance and to be able to defrag the indexes (which are 30-50% fragmented). To complicate the matter, this table is also a publisher in a transactional replication setup, with one subscriber. Also, the system needs to be up constantly so I'm only allowed about a 3-5 hour period to take an outage a week.
So far I've tested several methods of delete following all best practices (batch deletes, using indexes in delete's where clause), and have come up with deleting/commiting 500 rows at a time. The problem is that it still takes 3-4 seconds to delete this many rows, on a 8 GB RAM, 4 processor machine that is not currently used or replicated.
I'm at a loss on a way to pare down the data with a delete as the current purge script will take 7 hours a day for about 3 months. Another option I'm considering is to do a truncate and copy the data back over from the replicated database, but again this has its own set of problems, i.e. network latency and slow inset times. Yet another option would be to create a replica of the table on the production db, copy the data to it, then rename the table.
Any one have experience with purging such a massive amount of data? Any help would be greatly appreciated.
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Oct 25, 2015
I have a temp table like this
CREATE TABLE #Temp
(
ID int,
Source varchar(50),
Date datetime,
CID varchar(50),
Segments int,
Air_Date datetime,
[code]....
Getting Error
Msg 102, Level 15, State 1, Procedure PublishToDestination, Line 34 Incorrect syntax near 'd'.
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Aug 14, 2015
Below is my table structure. And I am inserting data from other temp table.
CREATE TABLE #revf (
[Cusip] [VARCHAR](50) NULL, [sponfID] [VARCHAR](max) NULL, GroupSeries [VARCHAR](max) NULL, [tran] [VARCHAR](max) NULL, [AddDate] [VARCHAR](max) NULL, [SetDate] [VARCHAR](max) NULL, [PoolNumber] [VARCHAR](max) NULL, [Aggregate] [VARCHAR](max) NULL, [Price] [VARCHAR](max) NULL, [NetAmount] [VARCHAR](max) NULL,
[Code] ....
Now in a next step I am deleting the records from #revf table. Please see the delete code below
DELETE
FROM #revf
WHERE fi_gnmaid IN (
SELECT DISTINCT r2.fi_gnmaid
FROM #revf r1, #revf r2
[Code] ...
I don't want to create this #rev table so that i can avoid the delete statement. But data should not affect. Can i rewrite the above as below:
SELECT [Cusip], [sponfID], GroupSeries, [tran], [AddDate], [SetDate], [PoolNumber], [Aggregate], [Price], [NetAmount], [Interest],
[Coupon], [TradeDate], [ReversalDate], [Description], [ImportDate], MAX([fi_gnmaid]) AS Fi_GNMAID, accounttype, [IgnoreFlag], [IgnoreReason], IncludeReversals, DatasetID, [DeloitteTaxComments], [ReconciliationID],
[Code] ....
If my above statement is wrong . Where i can improve here? And actually i am getting 4 rows difference.
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Oct 13, 2015
I am stuck in the following scenario.
Tbl_Loan
Trans_ID
Emp_ID
Guarantor_1_ID
Guarantor_1_ID
TRN_01
EMP_01
[code]....
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Aug 4, 2015
I have a table called ADSCHL which contains the school_code as Primary key and other two table as
RGDEGR(common field as SCHOOl_code) and RGENRl( Original_school_code) which are refrencing the ADSCHL. if a school_code will be updated both the table RGDEGR (school_code) and RGERNL ( original_schoolcode) has to be updated as well. I have been provided a new data that i have imported to SQL server using SSIS with table name as TESTCEP which has a column name school_code. I have been assigned a task to update the old school_code vale ( ADSCHL) with new school_code ( TESTCEP) and make sure the changes happen across all 3 tables.
I tried using Merge Update function not sure if this is going to work.
Update dbo.ADSCHL
SET dbo.ADSCHL.SCHOOL_CODE = FD.SCHOOL_Code
FROM dbo.ADSCHL AD
INNER JOIN TESTCEP FD
ON AD.SCHOOL_NAME = FD.School_Name
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Oct 4, 2015
I am studying indexes and keys. I have a table that has a fixed width of data to be loaded in the first column which is parsed in a view based on data types within the fixed width specifications.
Example column A:
(name phone house cost of house,zipcodecountystatecountry)
-a view will later split this large varchar string based
column b: is the source filename of the data load (varchar 256)
....
a. would there be a benefit of adding a clustered or nonclustered index (if so which/point in direction on why)
b. is there benefit of making one of these two columns a primary key (millions of records) or for adding a 3rd new column as a pk?
c. view: this parses the data in column a so it ends up looking more like "name phone house cost of house zipcode county state country" each having their own column.
-any pros/cons of adding indexes (if so which) to the view instead of the tables or both for once the data is parsed?
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Oct 5, 2015
I want to insert the data from temp table to other table. Only condition is, it needs to sorted based on tool number and tool date. For example if we have ten records for tool number 1000, it should be order by tool number and then based on tool_dt. Both tables doesn't have any primary keys. Please find below my code. I removed all the unnecessary columns for simple understanding. INSERT INTO tool_summary (tool_nbr, tool_dt) select tool_nbr, tool_dt from #tool order by tool_nbr, tool_dt...But this query is not working as expected. Data is getting shuffled.
Actual Data
Expected Result
1000
1-Aug
1000
1-Feb
1000
1-Jul
1000
[code]....
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Oct 22, 2015
I have a simple table data i want want to show row data in to column data.
SELECT clblcode,mlblmsg
FROM warninglabels
My expected result will be
0001 0002 0003 0004
------- ------- -------- --------
May Cause.... Important..... Take madi........... Do Not Take.......
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Aug 22, 2015
we have a table below
TABLE1
ID Roll Name Amount . . . . . . so on
---------------------------------------
1 2 Alex 500
2 5 Jones 600
3 2 Ales 400
and we have TABLE 2
ID Roll Name Amount . . . . . . . so on
In both the Tables ID Field is Identity Field and rest all the columns are identical in both the tables.I want to perform a query in such a way that SQL Should,
1) Remove all data from TABLE2 First
2) Select those records from TABLE1 where Roll = 2
3) Then, Insert the results to TABLE 2
So we should get the result similar to below:
ID Roll Name Amount . . . . . . . so on
---------------------------------------
1 2 Alex 500
3 2 Ales 400
how can I do this in a same sql statement.
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Jul 9, 2015
I have a table with couple of hundred thousand records, i have added a new column to the table named MD_Group.
Now i need this column populated, so that every 10,000 row set in that table gets a numeric (incremental number) assigned starting from 1.
So the first 10,000 rows will have MD_Group = 1, next 10,000 rows will have MD_Group = 2 , next 10K MD_Group = 3 etc.
For testing purpose here is a results table with total of 11 rows where we want data grouped every 3 rows.
MD_Group
CustomerNumber
AmountBilled
1
12
15243
1
1231234
15243
[code]....
-- Create Sample Table
Declare @GroupRelation_Test TABLE (
MD_Group [varchar](20),
CustomerNumber [varchar](20) ,
AmountBilled [varchar](20) ,
[code]....
-- Test data
INSERT INTO @GroupRelation_Test
( CustomerNumber, AmountBilled,MinAmounttBilled)
SELECT'12','15243','' UNION ALL
SELECT'1231234','15243','' UNION ALL
SELECT'463','15243','' UNION ALL
SELECT'442','15243','' UNION ALL
[code]....
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Aug 19, 2015
I have 2 tables: Source Table - IncidentDimNew and Destination Table - IncidentDimNew with identical columns: Id and CreatedDate but the data is different.
I would like to insert distinct data from those 2 columns of 1st table into the same 2 columns into the 2nd table but I onlt want to replace the values in the 2nd table where the Created Date is > 2015-04
I compiled the code in order to get the information I want from 2 tables:
Source Table
SELECT
COUNT(Id),
LEFT(CONVERT(VARCHAR(10)), CreatedDate, 126), 7)
FROM
IncidentDimNew
[Code] ...
This is the code I wrote in order to do it
INSERT INTO IncidentDim
[Id]
,[CreatedDate]
SELECT
[Id]
,[CreatedDate]
FROM
IncidentDimNew
where left(CONVERT(VARCHAR(10), CreatedDate, 126),7) > '2015-04'
GO
But what it does it's gives the SUM of the values in the corresponding rows where the values are not null which I don't want.
So how do I leave the values as is from table IncidentDim and insert new values as it is from IncidentDimNew where the Created Date is > 2015-04?
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Aug 10, 2015
I am still learning T-SQL .Lets consider the table below, ID 1-3 shows our purchase transactions from various Vendors and ID 4-6 shows our payments to them
Table 1 - VendorTransactions
ID PARTY AMOUNT VOUCHER
---------------------------------------
1 A 5000 Purchase
2 B 3000 Purchase
3 C 2000 Purchase
4 A 3000 Payment
5 B 1000 Payment
6 C 2000 Payment
7 A 1000 Payment
Now we have a blank table Table 2 - Liabilities
ID PARTY AMOUNT
I want that SQL should look for each individual party from Table 1 and Calculate TOTAL PURCHASE and TOTAL PAYMENTS and then deduct TOTAL PAYMENTS from TOTAL PURCHASE so we get the remaining balance due for each party and then add the DIFFERENCE AMOUNT alongwith PARTY to the TABLE 2 so I can get the desired result like below
ID PARTY AMOUNT
-------------------------
1 A 1000
2 B 2000
3 C 0
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Oct 26, 2015
I have a table which has data like shown in below image , I want to get count of case numbers which has responses 123 AND 125 ( case should have both responses), like this I have requirement for other responses, how can I do it in Stored procedure .
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Sep 25, 2015
I am having two table i.e( tbl_oldEmployee , tbl_NewEmployee ),which is having Column name Employee Name and City same in both table but inside column data is different in different table.but i want to view the Employee name and City from tbl_NewEmployee to tbl_oldEmployee which is having EmployeeId common with tbl_oldEmployee extra record also required (i.e tbl_NewEmployee having 6 record and tbl_oldEmployee having 10 record,so i need to display data from tbl_oldEmployee but first 6 record which id match with tbl_NewEmployee id should be replaced and extra data from tbl_oldEmployee also display).
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Jun 17, 2015
I have a table, dbo.Table1(Id,Col1,Col2,Col3,Col4,Col5,Col6,Col7,Col8) that I need to split between two tables dbo.Table2(Id, Col1, Col3, Col4) and dbo.Table3(Id,dbo.Table2_Id,Col5,Col6,Col7,Col8). But in dbo.Table3 I need to have the Id column from dbo.Table2 populated since its a foreign key constraint in dbo.Table3. How do I go about doing this?
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Jun 4, 2015
I have 900000 rows of data in a table and a sample of it is as shown below.Now I need to convert data into the format shown.
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May 10, 2015
I would like to know what is the preferred format for form submissions to a SQL table.
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Jul 1, 2015
I am wanting to fire-off an email with the failed jobs anytime they are deposited into a table. My syntax fires off an email even when the table does not contain data, it just sends a blank email. this will only generate an email if teh table contains data?
if exists (Select from FailedJobs)
exec msdb.dbo.sp_send_dbmail
@profile_name = 'DatabaseMail'
@recipients = 'asdfasdfsdf@aafas.com'
@from_address = 'asdfasdfacasca@cc.com'
@query = 'Select * from failedjobs'
@subject = 'List Of Failed Jobs'
@attach_query_result_as_file = 1;
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May 29, 2015
I have table with about 10000 rows, there is a column named Raw_XMLData is defined as varchar but data is xml format.
I try to insert into another table, if Raw_XMLData column has is valid xml data?
Is it possible to do in T sql?
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May 14, 2015
i am having three tables
test
testId testName totalQuestion
Questions
QuestionId fktestId QuestionName
Now i am trying to insert a duplicate copy test by passing testId..Here is my sp
if not EXISTS(SELECT testName from tblTest WHERE UPPER(@testName) = UPPER(@testName))
BEGIN
INSERT INTO tblTest SELECT @userId, testName,duration,totalQuestion,termsCondition,0,GETUTCDATE(),GETUTCDATE() from tblTest WHERE id=@testId
SET @insertedTestId=@@identity
INSERT INTO tblTestQuestion SELECT @insertedTestId,question,0,GETUTCDATE(),GETUTCDATE() from tblTestQuestion WHERE testId=@testId
END
how to insert in answer table as one question can be multiple answers.
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Sep 15, 2015
I want to select custom format from table?
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Oct 14, 2015
I've a table named Master in which a column is referenced in other tables like Child1, Child2,.. ChildN. I've deleted a part of data( say Column Id values 1,2,3,4,5) from all the Child tables which pointed to Master table Id column.
Now, I want to delete the same Id values from Master table as there rows are not referred in any of the child tables. When I try to delete the Id values 1 thru 5 from Master table, it is scanning all child tables for the references and taking lot of time for the deletion.
Is there any way to specify to the system(in the query) to delete the Master table values without scanning the child tables..?
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Jul 17, 2015
Table 1:
------- ----- ---- ----
Name Add No RowID
------- ----- ---- -------
aa #a-1,India 10
bb #a-1,India 11
aa #a-1,India 12
----------------------------------------------------
table 1 inserting to Table 2 (Using 1st Data flow)
Table 2:
------- ----- ----
Name Add ID(Note:Here Identity1,1)
------- ----- ----
aa #a-1,India 1
bb #a-1,India 2
aa #a-1,India 3
----------------------------------------------------
My Requirement is Update Table 1 set Column::No=Table 2.ID
based on Exact Match of
Table1.Name=Table2.Name and
Table1.Add=Table2.Add
It means Get back the Id for Source Table 1
2nd Data flow
Source(Table1:Name, Add,No)
|
--LOOKUP(Table2:Name, Add::Matched Look Columns Name, Add and
Tick Mark on ID)
|(Match)
-->OLEDB Command: update Table1 set N0=? where RowID=?(Here Param_0= NO ,Param_1=RowID)
Here My Issue is if Table 1 had Duplicates(same Name, Add, but Row Id is different it is Updating Same ID for Table 1.No It means Get Back ID correctly not updating Result::
Table 1:
------- ----- ---- ----
Name Add No RowID
------- ----- ---- -------
aa #a-1,India 1 10
bb #a-1,India 2 11
aa #a-1,India 1 12
----------------------------------------------------
My correct Output is 3 instead of Result:Table1 1.NO 1 where RowID =12
It caused by LOOKUP , It picking Top1 ID while Matching Look on fields.
How Should I update the (Identity) Get Back Table 2.ID to Source Table1. NO in Above logic in SSIS?
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May 29, 2015
I have a SQL text column from SP_who2 in table #SqlStatement:
like 1row shown below :
"update Panel set PanelValue=7286 where PanelFirmwareID=4 and PanelSettingID=9004000"
I want to find what table and column names are in the text ..
I tried like below ..
Select B.Statement from #sp_who2 A
LEFT JOIN #SqlStatement B ON A.spid = B.spid
where B.Statement IN (
SELECT T.name, C.name FROM sys.tables T
JOIN sys.columns C
ON T.object_id=C.object_id
WHERE T.type='U'
)
Something like this : find the column names and tables name
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Sep 17, 2015
I have been tasked with writing an update query to update a table with more than 150 million rows of data. Here are the table structures:
Source Tables :
OC
CREATE TABLE [dbo].[OC](
[OC] [nvarchar](255) NULL,
[DATE DEBUT] [date] NULL,
[DATE FIN] [date] NULL,
[Code Article] [nvarchar](255) NULL,
[INSERTION] [nvarchar](255) NULL,
[Code] ....
The update requirement is as follows:
DECLARE @Counter INT=0 --This causes the @@rowcount to be > 0
while @@rowcount>0
BEGIN
SET rowcount 10000
update r
set Comp=t.Comp
[Code] ....
The update took more than 48h and didn't terminate , how to accelerate it ?
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