Hi
I wanted to do a delete rows from a group of table. These tables have a common column UserID. I heard that there is something called ondelete cascade. But I don't know how to set it up and utilise it. Could someone tell me how to do it. Or point me to a tutorial which shows how to do it.
Thanks
Hi, I have had this problem for a while and have not been able solve it.
What im looking at doing is looping thru my patient table and trying to organise the patients in to there admission sequence, so when patient "A" comes in and is treated at my hospital and is discharged and admitted to another Hospital within one day then patient "A" will get a code of 1 being there first admission.
then if patient "A" is admitted again but there admission date is greater than one day they get a code of 2 being for there second admission but will need to loop thru table looking for other admissions and discharges.
The table name is Adm_disc_Match_tbl
Basically what i have 4 fields.
Index_key = which is the patient common link (text)
ur_episode = this wil change for each Hospital (text)
Admission_datetime = patient admission date and time (datetime)
Discharge_datetime = patient discharge date and time (datetime)
example of data
Code: ( text )
Index_key,ur_episode,Admission_datetime,discharge_ datetime
HERBERT-7/1929,513884-1686900,4/07/2006 10:58,17/07/2006 13:37
HERBERT-7/1929,C023092-1698859,17/07/2006 13:20,24/07/2006 0:30
ELSIE-5/1916,G148445-1720874,8/08/2006 11:00,30/08/2006 10:00
STANISLAWA-3/1918 ,G119981-1720045,8/08/2006 13:01,22/08/2006 12:13
FREDA-11/1925,183772-1998910,27/03/2007 9:53,3/04/2007 11:06
FREDA-11/1925,G147858-2007408,3/04/2007 10:49,26/04/2007 12:39
FREDA-11/1925,183772-2037727,28/04/2007 17:05,9/05/2007 11:41
FREDA-11/1925,G147858-2052082,9/05/2007 12:00,25/05/2007 11:17
If anyone could help it would be much appreciated.
I have a situation where deleting old records is blocking updating latest records on highly transactional table and getting timeout errors from application.
In details, I have one table called Tran_table1 in OLTP database. This Tran_table1 is highly transactional table, it will receive data for insert/update continuously
While archiving 2 years old records from Tran_table1 into Tran_table1_archive in batches(using DELETE OUTPUT INTO clause), if there is any UPDATEs on Tran_table1,these updates are getting blocked and result is timeout errors in application.
Is there any SQL Server hints to avoid blocking ..
Hi,I was wondering if it was possible to build a query that will include acolumn that will provide a count related records from another table.Although there is a way to achieve this through programming in thefront end, I would like to know if it possible to achieve the samething through a SQL statement alone.For example, say you have two related tables, Invoices andInvoiceItems. InvoiceID is the primary key of Invoices.Invoices tableInvoiceID PO_Num CompanyID-------------------------------1 37989 32 87302 43 78942 3InvoiceItems tableItemID InvoiceID PartNo Qty---------------------------------------1 1 ABA 32 1 ASLKDJ 23 1 9LF 84 2 IEPOW 185 2 EIWPD 36 2 DSSIO 17 2 EIWP 58 2 DC93 49 3 85LS0 8Then a query that has the Invoices table plus a count of InvoiceItemsfor each InvoiceID would generate this:InvoiceID PO_Num CompanyID ItemCount-------------------------------------------------1 37989 3 32 87302 4 53 78942 3 1Does anyone have any ideas how this would be done?Thank you.
View 1 Replies View RelatedMorning chucky eggsThis is duplicated over at SQLTeam...except I've moved on a bit so my question to you is different:http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=103798SQL 2k5I have a standard hierarchy in an adjacency table modelling business units in an organisation. I have another table associating people with (one single) business unit. I need to return all the people in each business unit in a cumulative manner i.e. a unit will include all people assigned to that unit and assigned to all child units too.Below is1) Set up code (in red)2) Initial query that failed on last data load due to the nature of the data changing and me not considering the ramifications of my initial solution properly3) My new soulution.My question is - is there a better way to accomplish this? I don't rate my code that highly and could do with this being as efficient as possible as at present I can't see it scaling to larger and larger data volumes all that well.USE tempdbgo----------------------------------------------------------------- Set up the structure & data...---------------------------------------------------------------CREATE TABLE dbo.org ( unit_code VARCHAR(10) NOT NULL , parent_code VARCHAR(10) NULL , CONSTRAINT pk_org PRIMARY KEY CLUSTERED (unit_code) WITH (FILLFACTOR = 100) )GO CREATE TABLE dbo.org_peeps ( unit_code VARCHAR(10) NOT NULL , person_code INT NOT NULL , CONSTRAINT pk_org_peeps PRIMARY KEY CLUSTERED (unit_code, person_code) WITH (FILLFACTOR = 100) , CONSTRAINT fk_org_peeps_other_org_peeps FOREIGN KEY (unit_code) REFERENCES dbo.org (unit_code) )GO CREATE VIEW dbo.org_peeps_parents--WITH SCHEMABINDINGAS SELECT org.unit_code , org.parent_code , org_peeps.person_code FROM dbo.org LEFT OUTER JOIN dbo.org_peeps ON org_peeps.unit_code = org.unit_codeGO INSERT INTO dbo.org (unit_code, parent_code)SELECT 'a', 'y' UNION ALLSELECT 'b', 'y' UNION ALLSELECT 'c', 'z' UNION ALLSELECT 'y', 'z' UNION ALLSELECT 'z', NULL--Insert people data (NOTE - the people are in units at the BOTTOM of the structure only)INSERT INTO dbo.org_peeps (unit_code, person_code)SELECT 'a', 1 UNION ALLSELECT 'c', 3 UNION ALL--These data go into intermediate levels of the organisation...SELECT 'y', 4 UNION ALLSELECT 'y', 5 UNION ALLSELECT 'y', 6---------------------------------------------------------------SELECT 'Original query. Because there is data in the intermediate tables --> ' + 'duplicate outputs....'---------------------------------------------------------------;WITH materialised_pathsAS ( SELECT unit_code , parent_code , person_code , unit_path = '/' + CAST(unit_code AS VARCHAR(MAX)) + '/' FROM dbo.org_peeps_parents WHERE parent_code IS NULL UNION ALL SELECT all_people.unit_code , all_people.parent_code , all_people.person_code , mp.unit_path + CAST(all_people.unit_code AS VARCHAR(MAX)) + '/' FROM dbo.org_peeps_parents AS all_people INNER JOIN materialised_paths AS mp ON mp.unit_code = all_people.parent_code )SELECT parents.unit_code , children.person_codeFROM materialised_paths AS childrenCROSS APPLY --Correlated derived table - get the child records per unit ( SELECT unit_code , parent_code FROM dbo.org AS parents_sub WHERE children.unit_path LIKE '%/' + parents_sub.unit_code + '/%' ) AS parentsWHERE children.person_code IS NOT NULLORDER BY person_code , unit_code-----------------------------------------------------------------SELECT 'This query returns the correct results but man it is ugly. '+ 'Can it be refined optimised?'-----------------------------------------------------------------;WITH materialised_pathsAS ( SELECT unit_code , parent_code , unit_path = '/' + CAST(unit_code AS VARCHAR(MAX)) + '/' FROM dbo.org WHERE parent_code IS NULL UNION ALL SELECT all_orgs.unit_code , all_orgs.parent_code , mp.unit_path + CAST(all_orgs.unit_code AS VARCHAR(MAX)) + '/' FROM dbo.org AS all_orgs INNER JOIN materialised_paths AS mp ON mp.unit_code = all_orgs.parent_code )SELECT all_orgs.unit_code , org_peeps.person_codeFROM dbo.org_peepsINNER JOIN ( SELECT org.unit_code , mp.unit_path FROM materialised_paths AS mp CROSS APPLY ( SELECT unit_code , parent_code FROM dbo.org WHERE mp.unit_path LIKE '%/' + org.unit_code + '/%' ) AS org ) AS all_orgsON all_orgs.unit_path LIKE '%/' + org_peeps.unit_code + '/'ORDER BY person_code , all_orgs.unit_code--Clean upIF EXISTS (SELECT NULL FROM sys.views WHERE object_id = OBJECT_ID('dbo.org_peeps_parents')) BEGIN DROP VIEW dbo.org_peeps_parentsENDIF EXISTS (SELECT NULL FROM sys.tables WHERE object_id = OBJECT_ID('dbo.org_peeps')) BEGIN DROP TABLE dbo.org_peepsENDIF EXISTS (SELECT NULL FROM sys.tables WHERE object_id = OBJECT_ID('dbo.org')) BEGIN DROP TABLE dbo.orgENDAs ever kudos and lavish thanks to anyone that can help :DOh - I nearly forgot - accounting for the Rudy clause - desired output:unit_code person_code---------- -----------a 1y 1z 1c 3z 3y 4z 4y 5z 5y 6z 6
View 14 Replies View RelatedI am trying to delete the records in 2 related tables. The 'child' table has a field called [SETA],
I want to delete all the records in this table that contain the same info, as well all the fields in the parent table that is related to this table. They share the [ID] field as key. This is my code:
Code:
DELETE FROM Student a full outer JOIN Qualification b on a.[ID] =b.[ID] WHERE b.[SETA] = @SETA
Oh hai
This is closely related to this problem where Ryan & Peter helped me out loads (thanks again guys):
http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=101989
I now have a slightly different problem. Instead of returning the cumulative counts of people related to a business unit in the hierarchy I now need to return the actual people records. I had some code, derived from the above, that worked fine until I loaded some new data. It took a while but eventually I figured out the (now obvious) reason for the error. I have tried several changes to the query and not got anywhere. Please could someone have a look and see if you can suggest the required alteration(s)?
USE tempdb
go
---------------------------------------------------------------
--Set up the structure & data...
---------------------------------------------------------------
CREATE TABLE dbo.org
(
unit_codeVARCHAR(10)NOT NULL
, parent_codeVARCHAR(10)NULL
, CONSTRAINT pk_orgPRIMARY KEY CLUSTERED (unit_code) WITH (FILLFACTOR = 100)
)
GO
CREATE TABLE dbo.org_peeps
(
unit_codeVARCHAR(10)NOT NULL
, person_codeINTNOT NULL
, CONSTRAINT pk_org_peepsPRIMARY KEY CLUSTERED (unit_code, person_code) WITH (FILLFACTOR = 100)
, CONSTRAINT fk_org_peeps_other_org_peepsFOREIGN KEY (unit_code) REFERENCES dbo.org (unit_code)
)
GO
CREATE VIEW dbo.org_peeps_parents
--WITH SCHEMABINDING
AS
SELECT org.unit_code
, org.parent_code
, org_peeps.person_code
FROMdbo.org
LEFT OUTER JOIN
dbo.org_peeps
ONorg_peeps.unit_code= org.unit_code
GO
INSERT INTO dbo.org (unit_code, parent_code)
SELECT 'a', 'y'UNION ALL
SELECT 'b', 'y'UNION ALL
SELECT 'c', 'z'UNION ALL
SELECT 'y', 'z'UNION ALL
SELECT 'z', NULL
--Insert people data (NOTE - the people are in units at the BOTTOM of the structure only)
INSERT INTO dbo.org_peeps (unit_code, person_code)
SELECT 'a', 1UNION ALL
SELECT 'c', 3
---------------------------------------------------------------
SELECT'This works great....'
---------------------------------------------------------------
;WITHmaterialised_paths
AS
(
SELECTunit_code
, parent_code
, person_code
, unit_path= '/' + CAST(unit_code AS VARCHAR(MAX)) + '/'
FROMdbo.org_peeps_parents
WHEREparent_code IS NULL
UNION ALL
SELECTall_people.unit_code
, all_people.parent_code
, all_people.person_code
, mp.unit_path + CAST(all_people.unit_code AS VARCHAR(MAX)) + '/'
FROMdbo.org_peeps_parents AS all_people
INNER JOIN
materialised_paths AS mp
ONmp.unit_code= all_people.parent_code
)
SELECTparents.unit_code
, children.person_code
, children.unit_path
FROMmaterialised_paths AS children
CROSS APPLY--Correlated derived table - get the child records per unit
(
SELECTunit_code
, parent_code
FROMdbo.orgAS parents_sub
WHEREchildren.unit_path LIKE '%/' + parents_sub.unit_code + '/%'
) AS parents
WHEREchildren.person_code IS NOT NULL
ORDER BY person_code
, unit_code
--Add data to INTERMEDIATE levels of organisation
INSERT INTO dbo.org_peeps (unit_code, person_code)
SELECT 'y', 4UNION ALL
SELECT 'y', 5UNION ALL
SELECT 'y', 6
---------------------------------------------------------------
SELECT'Since there is now data in the intermediate tables there are ' +
'duplicate outputs....'
---------------------------------------------------------------
;WITHmaterialised_paths
AS
(
SELECTunit_code
, parent_code
, person_code
, unit_path= '/' + CAST(unit_code AS VARCHAR(MAX)) + '/'
FROMdbo.org_peeps_parents
WHEREparent_code IS NULL
UNION ALL
SELECTall_people.unit_code
, all_people.parent_code
, all_people.person_code
, mp.unit_path + CAST(all_people.unit_code AS VARCHAR(MAX)) + '/'
FROMdbo.org_peeps_parents AS all_people
INNER JOIN
materialised_paths AS mp
ONmp.unit_code= all_people.parent_code
)
SELECTparents.unit_code
, children.person_code
, children.unit_path
FROMmaterialised_paths AS children
CROSS APPLY--Correlated derived table - get the child records per unit
(
SELECTunit_code
, parent_code
FROMdbo.orgAS parents_sub
WHEREchildren.unit_path LIKE '%/' + parents_sub.unit_code + '/%'
) AS parents
WHEREchildren.person_code IS NOT NULL
ORDER BY person_code
, unit_code
---------------------------------------------------------------
SELECT'This is the output I want - but I can''t simply apply distinct - the volumes of data preclude this'
---------------------------------------------------------------
;WITHmaterialised_paths
AS
(
SELECTunit_code
, parent_code
, person_code
, unit_path= '/' + CAST(unit_code AS VARCHAR(MAX)) + '/'
FROMdbo.org_peeps_parents
WHEREparent_code IS NULL
UNION ALL
SELECTall_people.unit_code
, all_people.parent_code
, all_people.person_code
, mp.unit_path + CAST(all_people.unit_code AS VARCHAR(MAX)) + '/'
FROMdbo.org_peeps_parents AS all_people
INNER JOIN
materialised_paths AS mp
ONmp.unit_code= all_people.parent_code
)
SELECTDISTINCT
parents.unit_code
, children.person_code
, children.unit_path
FROMmaterialised_paths AS children
CROSS APPLY--Correlated derived table - get the child records per unit
(
SELECTunit_code
, parent_code
FROMdbo.orgAS parents_sub
WHEREchildren.unit_path LIKE '%/' + parents_sub.unit_code + '/%'
) AS parents
WHEREchildren.person_code IS NOT NULL
ORDER BY person_code
, unit_code
--Clean up
IF EXISTS (SELECT NULL FROM sys.views WHERE object_id = OBJECT_ID('dbo.org_peeps_parents')) BEGIN
DROP VIEW dbo.org_peeps_parents
END
IF EXISTS (SELECT NULL FROM sys.tables WHERE object_id = OBJECT_ID('dbo.org_peeps')) BEGIN
DROP TABLE dbo.org_peeps
END
IF EXISTS (SELECT NULL FROM sys.tables WHERE object_id = OBJECT_ID('dbo.org')) BEGIN
DROP TABLE dbo.org
ENDJust paste and run the code and hopefully it should be reasonably clear. If you need any further info please let me know
Hi,
I have 3 tables:
Employees with the fields:idEmployee and employeeName
Roles with the fields:idRole and roleName.
An employee can have one or many roles.
I created the table EmployeeRoles with the fields: id,idEmployee,idRole.
idEmployee and idRole are foreign keys.
I want to insert a new employee into Employees table, but I have to insert idEmployee field into EmployeeRoles table.
How can I do this?
Thanks
The problem of mine is, I have a datagrid, Which displays data from a Employee(parent) table.
Now I want to delete some records based on the user selected checkbox,only those records which has no related records in the EmployeeProject(child) can be deleted.I want to know which are all the record that cannot be deleted?
How can I achieve this?
Hi guysI'm mulling over the best way to do something and would like your input. Forgive me if this is a bit 101 - I haven't ever had to do this in SQL before!Fairly standard set up - Hierarchy table modelling the structure of an organisation.Related table associating members of staff to the hierarchy.I want to return all levels of the hierarchy and for each level I would like to know the total number of people in the level (so for a division it would be the sum of all people in the child teams).Parameters - This table will be modelling many organisations' structures - I cannot guarentee anything like "there will never be more than n levels". As such - I would strongly prefer to have something that is iterative recursive. I can change the schema to suit the method I use if necessary. Database is not transactional - I am not concerned about updating speed. SQL Server 2K5.I've tried CTE but it turns out you cannot use group by in CTEs (even in derived tables). I have not yet tried feeding it a view or similar.I have not tried nested sets, materialised paths, accumulator table - I thought I would see if there is something obvious before I start piddling around with those.Ta!
View 11 Replies View RelatedSQL Server 2005.
Schema is not fixed at this stage - small project, schema can be adapted if neccessary.
This needs to be produced in SQL Server - there is no client application.
Hi
I am really struggling to write the SQL for the following requirement and have got to the stage where I think I need someone to give me some pointers. I can't believe this is a novel requirement but I haven't had to do this before nor can find anything similar when googling.
I have a hierarchy detailing an organisation structure. Eventually the table will store many structures and these may one day be "pseudo structures" to enable really granular reporting. As such I cannot really say "there will never be more than N levels to this hierarchy". Currently I'm using a standard adjacency design. From now on I'll call the items in the table "business units".
There is a further table with a related FK declared which associates people with business units.
Requirement: Return all business units and cumulative total total of employees for each of these units (i.e. the total for each business unit will be the number of people in that unit plus the sum of the people in all the child units).
I've asked this question on dbforums but ended up a blind alley despite Peter's attempt to help. I'm starting again from scratch but feel free to review the (now dead) thread here:
http://www.dbforums.com/showthread.php?t=1629366
To summarise - I tried the CTE route but of course this evaluates the hierarchy from the top down. To fulfill the requirement, the bottom of the structure needs to be the starting point. I also tried reversing the hierarchy so that children, rather than the parent, are stored but my query fails if there are 3+ levels.
Code to reproduce problem (note - I expect that I will need to get the employee count per business unit prior to working with the hierarchy so I have flattened the schema to reflect this - I think I can handle the SQL to get the non-cumulative count per business unit ):
DECLARE @table TABLE
(
unit_codeTINYINT
, parent_codeTINYINT
, headcountINT
, PRIMARY KEY CLUSTERED (unit_code)
)
INSERT INTO @table (unit_code, parent_code, headcount)
SELECT 1, 4, 10 UNION ALL
SELECT 2, 4, 130 UNION ALL
SELECT 3, 10, 93 UNION ALL
SELECT 4, 10, 7 UNION ALL
SELECT 10, NULL, 1
Required output:
unit_codecumulative_headcount
------------------------------------
110
2130
393
4147
10241
Many thanks
I need a boost to understand how to get started on solving this SQL Query.
TicketId Seq StatusDateTime
T10001 1 2015-05-04 15:54:00.000
T10001 2 2015-05-04 16:35:00.000
T10001 3 2015-05-04 16:42:00.000
T10001 4 2015-05-05 08:19:00.000
T10002 1 2015-05-04 15:56:00.000
T10002 2 2015-05-04 15:57:00.000
I need to find the total StatusDateTime for each TicketId
I need to find the average StatusDateTime for all TicketIDs
Ex. TicketId, "T10001", has 4 records based on the Seq column.
By using this, I should be able to find the amount of time between the first Seq and the last Seq to get a total time span for Ticket.
Expanding on this, I should be able to add up all of the Ticket's calculated time spans and divide by the number of tickets to get the average time span.
I have a table that has multiple transactions for stock items.
This table holds all records relating to items that are inducted onto the system and there movement. For each stock item i am interested in getting the drop destination, if it has one, and only when it follows the sequential order of "Inducted>OnTransport>Dropped" (this sequence isn't always the case). Also note the CreatedDate for the Inducted and OnTransport records for the valid sequences are always the same. Below is a valid sequence for a stock item so i would want to return 'Lane01' for the Destination of this occurrence of the stock item, if this item didn't have a valid drop location then destination would be blank. Also note each stock item can be inducted more than one time per-day.
I think i have managed to build the below sql but it will only do one item at a time, so would have to wrap it in a function. Is there a way of writing a set based select statement that gets all the inducted items and for the ones that do follow the "Inducted>OnTransport>Dropped" return the destination it was dropped at? I've attached scrips below:
DECLARE @StockItemID nVarchar(128)
DECLARE @CreateDate DATETIME
Set @StockItemID='8cbe17da-6079-4170-b27a-41c0d38830f6'
Set @CreateDate = CAST('2015-08-31 13:52:39.890' AS datetime)
[Code] ....
Terminology question:Is there a term for a set of records related directly or indirectly by keyvalue in several tables? For example, a single invoice record and its lineitem records -or- a single customer, the customer's orders, the order linesfor those orders, the customer's invoices, and the invoice lines for thoseinvoices.I'm thinking the term might be graph, but I'm not at all certain of this.Thanks,Steve J
View 17 Replies View RelatedI must admit I dont know all that much about SQL, which is why I hope someone can show me the light. I have a script almost finished, however I have no idea how to have it trim database entries that are older than, say, 90 days. Any ideas?
View 10 Replies View RelatedI have a table with a load of orphaned records (I know... poor design)
I'm trying to get rid of them, but I'm having a brain cramp.
I need to delete all the records from the table "Floor_Stock" that
would be returned by this select statement:
SELECT FLOOR_STOCK.PRODUCT, FLOOR_STOCK.SITE
FROM PRODUCT_MASTER INNER JOIN
FLOOR_STOCK ON PRODUCT_MASTER.PRODUCT =
FLOOR_STOCK.PRODUCT LEFT OUTER JOIN
BOD_HEADER ON FLOOR_STOCK.PRODUCT =
BOD_HEADER.PRODUCT AND FLOOR_STOCK.SITE =
BOD_HEADER.SITE
WHERE (BOD_HEADER.BOD_INDEX IS NULL) AND
(PRODUCT_MASTER.PROD_TYPE IN ('f', 'n', 'k', 'b', 'l', 's'))
I was thinking along the lines of:
DELETE FROM FLOOR_STOCK INNER JOIN
(SELECT FLOOR_STOCK. PRODUCT, FLOOR_STOCK.SITE
FROM PRODUCT_MASTER INNER JOIN
FLOOR_STOCK ON PRODUCT_MASTER. PRODUCT =
FLOOR_STOCK.PRODUCT
LEFT OUTER JOIN BOD_HEADER ON FLOOR_STOCK. PRODUCT =
BOD_HEADER. PRODUCT AND FLOOR_STOCK.SITE = BOD_HEADER.SITE
WHERE (BOD_HEADER.BOD_INDEX IS NULL) AND
(PRODUCT_MASTER.PROD_TYPE IN ('f', 'n', 'k', 'b', 'l', 's'))) F ON
FLOOR_STOCK. PRODUCT = F. PRODUCT
AND FLOOR_STOCK.SITE = F.SITE
... but Sql Server just laughs at me: "Incorrect Syntax near the keyword INNER"
How do I delete one record from one table and cascade down all related tables?
Mike B
Hey all,
Here is the scenario. I'm working with two tables:
Contact1
Conthist
Contact1 contains basic contact information and conthist contains history records for those contacts. Conthist can hold many records related to a single contact1 record.
The link between the two tables is a column called accountno.
I'm trying to delete any records in conthist that have an accountno that does not exist in contact1. The queries that I've tried keep returning conthist records that do actually have a matching accountno.
Any help would be appreciated.
Thanks,
Tony
Whenever I try to delete records from a table joined to another table, like so:
DELETE [tblTransaction Detail Local] FROM [tblTransaction Detail Local], [tblTransaction Header] WHERE ([tblTransaction Detail Local].[Transaction ID] = [tblTransaction Header].[Transaction ID]) AND ([tblTransaction Header].[Computer ID] = 3)
I get the error:
Major Error 0x80040E14, Minor Error 25501
> DELETE [tblTransaction Detail Local] FROM [tblTransaction Detail Local], [tblTransaction Header] WHERE ([tblTransaction Detail Local].[Transaction ID] = [tblTransaction Header].[Transaction ID]) AND ([tblTransaction Header].[Computer ID] = 3)
There was an error parsing the query. [ Token line number = 1,Token line offset = 38,Token in error = FROM ]
This is an SQL CE database, and SQL Server Management Studio. Any ideas?
I have a couple SQL tables that have been appended to daily over the last two years. There is now about 50,000,000 records in the table. Does anyone know the fastest way to delete records before a certain date to shorten these tables? Delete queries and everything else I've tried is taking way too long.
View 13 Replies View RelatedThanks for your time,
How to calculate & save a Parent status [qcStatus varchar(30)] and Alert [alertFlag bit] in dbo.a1_qcParent
based on comparison of its Child records in dbo.a3_qcItems2Fix columns [itemComplete bit] and [alertFlag bit]
Where a1_qcParent[a1_id] = a3_qcItems2Fix[a1_ID]
- Parent CLOSED: if all children [itemComplete] are True
- Parent OPEN: if any child [itemComplete] is False
- Parent ALERT: True if any child row [alertFlag bit] is True
Using sql_Datasource in webpage, but more comfortable in sql... After-Trigger?
Can Parent columns have calculated formula referencing the child table? Please help.
Apparently, deleting 7,000,000 records from a table of about 20,000,000 is not advisable. We were able to take orders at 8:00AM, but not at 7:59.
So, what's the best way of going about deleting a large number of records? Pretty basic lookup table, no relationships with other tables, 12 or so address-type fields, 4 or 5 simple indexes. I can take it down for a weekend or night, if needed.
DTS the ones to keep to another table, drop the old and rename the new table?
Bulk copy out, truncate and bring back in?
DTS to text, truncate and import back?
Other ways?
Never worked with such a large table and need a little experienced guidance.
Thanks for the help
My Web Host does not provide administrative privilages to the SQL server I have access to. I would like to delete tens of thousands of records from two of my tables without writing to the Transaction Log. Is what I'm trying to do is delete these records quickly without utilizing any of the alotted space my web host has set aside for my transaction log (they give me 50 mb and I go way over that when I run a DELETE statement)
What is the best way to do this?
I need a sql statement to delete duplicate records.
I have a college table with all colleges in the nation.
I noticed that all of the colleges were listed twice.
How do I delete all of the duplicate records.
Here is my table.
Colleges
-------------------
schoolID - smallint NOT NULL,
schoolName - varchar(60) NULL
Can someone help me out with the sql statement???
I'm running SQL Server 6.5.
- ted
Hi All,
I am having one table named MyTable and this table contains only one column MyCol. Now i m having 10 records in it and all the records are duplicate ie value is 7 for all 10 records.
It is something like this,
MyCol
7
7
7
7
7
7
7
7
7
7
Now i m trying to delete 10th record or any record then it gives me error
"Key column information is insufficient or incorrect. Too many rows were affected by update."
What should i do if i want only 4 records insted 10 records in my table?
How do i delete the 6 records from table?
Plz help me.
Regards,
Shailesh
I have a problem where records in underlying tables of a dataview are being deleted (seemingly at random)
For example.
CREATE TABLE [Employee] (Id int, Name varchar(50))
CREATE TABLE [Company] (Id int, Name varchar(50))
CREATE TABLE [EmployeeCompany] (CompanyId int, EmployeeId int)
CREATE VIEW [dvEmployee]
AS
SELECT *
FROM [Employee] INNER JOIN [EmployeeCompany]
ON [Employee].[Id] = [EmployeeCompany].[EmployeeId]
CREATE TRIGGER [dvEmployeeUpdate]
ON [dbo].[dvEmployee]
INSTEAD OF UPDATE
AS
BEGIN
UPDATE EmployeeCompany
SET Status = INSERTED.Status
FROM EmployeeCompany, INSERTED
WHERE EmployeeCompany.CompanyId = INSERTED.CompanyId
AND EmployeeCompany.EmployeeId = INSERTED.EmployeeId
END
Because the column [Status] is a t-sql keyword, does the fact that the trigger contains the line "SET Status = ..." without saying "SET [Status] = ..." mean that I could lose records in the EmployeeCompany table?
Reason I'm asking is we have an already designed database that is littered with columns named the same as sql keywords (almost every table has a [Status] column, and there are many [Password] columns). When using a dataview on these tables, triggers exist that aren't putting the [] around these column names (the same as my dvEmployeeUpdate trigger above), and somehow we are seemingly randomly losing records. It is very rare, and they are getting completely deleted, and it seems to be the tables that contain the keyword columns and are used in dataviews with instead of triggers that don't put [] around the column names. Nowhere in any trigger or stored procedure is there a DELETE FROM on these tables, and the software running on the database uses only the data views, and doesn't directly access the underlying tables.
I've been going through all of the code adding the [], but my question is simply whether or not anyone has heard of this causing the deletion of any records, or whether there may be something else going on that I should be looking into?
help me out on this one.
i have 2 text boxes in my page.
user enter any number in those two text boxes.
i slect that many record randomly from my main table, and put it into two another tables.
now the problem is coming in how to delete those records which were randomly selected from main table in main table.
for eg
main table contains
srNo. UswerID
1 abcd
2 trtr
3 tret
4 yghg
5 jjhj
user enters in text box1 '2' and in text box2 `1'
so total of 3 random records are selected
and put it into two another table say
table1
sr.no UserID
2 trtr
and table2 contains
sr.no. userid
3 tret
5 jjhj
now i want to delete these records which are sr.no 2,3,5 from the main table.
how do i do it as user can enter any number in the text box.so writing multiple delete statements would not be possible.
how do i write statements or help me with logic.
gaurav writes "respected sir
here i have a question
how we can delete duplicate records through query in SQL Server
thanks"
I have a database that is used to store a lot of data. We load the data on adaily basis, several thousand records per day. The Log file is not needed,so whats the best way to delete the records in it and reduce the sizeThanksDerrick
View 1 Replies View RelatedI have around 3 tables having around 20 to 30gb of data. My table A related to table B by a FK and same way table B related to table C by FK. I would like to delete all rows satisfying certain condition from table A and all corresponding related records from table B and C. I have created a query to delete the grandchild first, followed by child table and finally parent. I have used inner join in my delete query. As you all know, inner join delete operations, are going to be extremely resource Intensive especially on bigger tables.
What is the best approach to delete all these rows? There are many constraints, triggers on these tables. Also, there might be some FK relations to other tables as well.
Hi, i need the suggestion here in very familiar db situation ..i have a main table and a primary key of that table is used in many other table as foreign key.If i am deleting a record in a main table,how do i make sure that all the corresponding record in the associated tables,where that foreign key is used, gets deleted too?What are my options?Thanks
View 5 Replies View RelatedHello all,
I have a DTS package set up to import a text file on a daily basis. I need to dump the data in 2 table after 7 days of the last import .this is the code that I have
Delete From TblTemp
date(Day(-7), CurrentStamp).
But for some reason it deleting the data right after it imports it. And it doesn't delete anything out of the other table.
Thanks in advance
I have a function that opens a connection to an SQL database, issues a
SELECT command, and reads the records with an OleDbDataReader. As the
records are read, any that match certain criteria are deleted with a
DELETE command. Simplified example code is shown below:
Dim dbCmd As OleDb.OleDbCommand = New OleDb.OleDbCommand()
dbCmd.Connection = New OleDb.OleDbConnection(UserDbConnString)
dbCmd.CommandText = "SELECT * FROM [User] ORDER BY UserID"
dbCmd.Connection.Open()
Dim reader as OleDb.OleDbDataReader = dbCmd.ExecuteReader(CommandBehavior.CloseConnection)
While reader.Read()
If reader("SomeColumn") = SomeCalculatedValue Then
Dim dbCmd2 As OleDb.OleDbCommand = New OleDb.OleDbCommand()
dbCmd2.Connection = New OleDb.OleDbConnection(UserDbConnString)
dbCmd2.CommandText = "DELETE FROM [User] WHERE UserID = " + reader("UserID")
dbCmd2.Connection.Open()
dbCmd2.ExecuteNonQuery()
dbCmd2.Connection.Close()
End If
End While
reader.Close()
This code worked well with an MS Access database, but when I changed to
SQL Server, I get a database timeout error when attempting to do the
DELETE. I suspect the reason is that the connection the reader has open
has the record locked so it cannot be deleted.
The SQL connection string I am using is something like this:
UserDbConnString = "Provider=SQLOLEDB; Server=(Local); User ID=userid; Password=password; Database=dbname"
The connection string I used for MS Access included the property
"Mode=Share Deny None". I wonder if there is some similar way to tell
SQL Server to allow editing of records that are open for reading with
an OleDbDataReader.
Any help would be appreciated.