How To Delete A Column Using Script Code
Nov 2, 2006
hi all
iam having a query , c guys iam having a table in sql with some coulmns in it , i have a column named as country in the table , now wat i want to be done is , i want to delete the column country based on some conditions , i ve to write a script code as : i ve to check if the column is there already or not if its there it shld delete the column or if its not there it shld not show any error and just return empty handed thats all , i dont know wat to be done , so if anyone knows abt it pls do send as soon as possible guys , hopefully waiting for a reply
Note : any dbts pls do mail me again
Venkatesan
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Nov 12, 2012
I am trying to exclude records from a table where the ID column is the same but the Mail code Column is multi-valued.For Example: (the table looks like....)
ID Mail_code
111111 XNT
111111 N11
111111 XNC
222222 XNC
222222 XNL
333333 XNC
So, if there is any ID that has a value of XNC, I want to exclude the ID all together from my output regardless of the other values.
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Dec 2, 2007
in Table A Column is
PriKey No Name
1 1 Apple
2 2 Orange
3 3 Juicy
in Table B column is
Prikey ColumnA Price
1 1 10
2 3 2
3 2 5
TableA.Prikey have Depency with TableB.ColumnA
when I am trying to Delete data from Table A , I got error message becaue the depency
how to delete data when there have depency?
I just know when table have trigger , we can disable trigger before delete Data, and enable trigger when data deleted
does there have a way to disable depency and then enable ?
thank you
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Jul 15, 2007
hi friends, i've a table with (columns) username, content,data,........... i need to delete all column names(i.e.,content,data,........) except username for the specified username. eg: consider username=mahendran. i've to delete the values in the content,data,...............for the username=mahendran. but username should exist.how to do that?pls help me......
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Jan 14, 2007
I have mysql type db in which I need computer to search for a key phrase of text that has several hundred occurances inside product table descriptions of products on live site. Once it finds the text, I would like for it to simply remove it, and look for the next occurance of the phrase and repeat the process until all are flagged and removed. I was told their may be a line of sql code that employs such a feature. Can anyone tell me what such a line would be?
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Oct 18, 2000
Hello people
Can someone tell me if, and then how I can delete/remove a column from a table in SQL6.5. (I know how to add a column)
Regards
De Waal
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Jan 30, 2006
Guys, i have a table that one of the columns (Email To) is
a concatenated list of email addresses separated by semi colons ";".
i.e.:
rrb7@yahoo.com;richard.butcher@sthou.com;administr ator@sthou.com
etc like that.
each row varies with one exception. administrator@sthou.com is in each one.
is there a simple way thru sql or T-SQL to delete that "administrator@sthou.com" part? or should i call each row individually into say, a VB.net form using a split with the deliminator ";"
and then looping thru and updating each row?
thanks again for any easy answer
rik
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Jul 5, 2007
Hi
I have to delete the value of acktitle where ackby = null
I tried using update but its not helping me i tried doing
update incidents(table name)
set acktitle = null where ackby = null
its not giving me any results thats why i thought of delecting but delete syntax removes the whole row
How should i go about it
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Mar 30, 2006
Dear all
I would like to ask one sql question , it's that possible to use statement delete my columns ?
select * from tablename where columna = '--delete from tablename '
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Mar 31, 2008
Currently running Sql Server 2005Is it possible to issue the delete command and capture the affected rows asxml types that will be stored in an audit table with an xml column?Something along the lines of:delete from source_tableoutput(deleted.*into audit_table (xml_audit_column)for xml auto)where source_table.column = @delete_value
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Feb 27, 2008
The business operation is this:
The data is stored and accessed by Invoice Number and Line Number. If there are 4 lines, 1,2,3,4 and number 2 is deleted the users want lines 3 and 4 reordered to be 2 and 3.
The existing code does things the following way, but I have my suspicions about how bulletproof it is:
Existing Data:
123,1
123,2
123,3
123,4
Begin Transaction
Delete where InvoiceNumber = 123 and LineNumber = 2.
Update set LineNumber=2 where InvoiceNumber=123 and LineNumber=3
Update set LineNumber=3 where InvoiceNumber=123 and LineNumber=4
Commit Transaction
Is there a better way of doing this?
Thanks.
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May 5, 2015
I have a table named [New Item] and created a default constraint on a column, and i wanted to change the data type of the column using the query
alter table [new item]
alter column pcs_qty decimal(15,2) not null
but the name of the default constraint is 'DF__New Item__Pcs_Qt__2D12A970' and i am not able to delete the constraint because it contains a space in between.Is there any work around for this.
I tried to delete the constraint by using the query
alter table [new item]
drop constraint 'DF__New Item__Pcs_Qt__2D12A970'
but I am getting the exception,
Msg 102, Level 15, State 1, Line 2
Incorrect syntax near 'DF__New Item__Pcs_Qt__2D12A970'.
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Apr 30, 2007
Hello,
I am looking to preserve the ROWGUID column that is created automatically when a table is added to a publication as I have noticed that the column is removed and readded (with new values) each time the publication is deleted and recreated. We are planning on using the values in the rowguid column for a non-replication purpose, and don't wish the column to be removed or the values to be reset in the event the 'owning' publication is dropped for whatever reason. I've done some research and have identified the preserve_rowguidcol column of the sysmergearticles table as a candidate for achieving the desired goal. Before moving forward, I wanted to ask for input regarding this. Are there any best practices I've overlooked on this topic? Neither Google nor this forum's search results yield any real discussion on this topic.
Thanks!
DanD
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Nov 10, 2005
I have a column that contains extra info that needs to be moved to another column or deleted alltogether. is there a way to select these items and move them to another column, leaving the rest of the data in the original column?
EXAMPLE
MYTABLE >COLUMN1
May have Data Like: ABCDE123 SER1 or XYZ12DEFSer1:1
WHAT I NEED TO DO IS
Move anything after the SER1 to a new column and retain the rest of the data in the original column. making it look something like this:
COL1 COL2
ABCDE123 SER1
XYZ12DEF Ser1:1
Another question is if there is a way to delete extra spaces? Like make all data that has two or more extra spaces, just single spaces and any additional spacing after a row of data, delete all additional spaces after the last letter/character/number.
One more question - What would be a great resource to learn MS SQL in more depth?
I am trying to learn ASP/VBScript/JavaScript/ and now MS SQL all at once b/c this is what my business depends on. Trying to be 5,000 hats at once can get confusing and overwhelming, so I am looking for any "Crash course" I can to learn as much, as fast as possible. Any direction or ideas?
Thank you.
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Dec 16, 2005
Quote: Originally Posted by mrtwice99 Yes, but how would you figure out which row was "before" it?
Code:
SELECT id, sortOrder, name FROM daTable
WHERE id = 937 OR sortorder =
( select max(sortorder) from daTable
where sortorder < ( select sortorder from daTable where id = 937) )
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Nov 18, 2011
I have a MS SQL table with a derived column, for date the records were imported, and need to delete records, based on the content of this column. What I need to do is delete all records from the table with a date of '2011-11-18'. Now this column is a datetime column, so it contains the time info after the date, i.e. 2011-11-18 09:29:38.000, but no matter what command I try for this:
-Delete from table where Date_Imported like '2011-11-18%'
-Delete from table where Date_Imported like '2011-11-18'
-Delete from table where Date_Imported = 2011-11-18
It comes back saying "0 rows affected", even though I know there are records with that date in the table.
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Dec 11, 2007
I recently converted a column that was once an int to an bigint on one of my tables. The modified column provided a generic row id information and there are duplicates within this column. I am trying to perform a self join via the following:
SELECT a.row_id FROM test_db a INNER JOIN test_db b ON b.row_id < a.row_id.
This code use to work when the column was an int but now I am getting high CPU issues since I converted to bigint. I am unsure on why the change to bigint will cause such an issue. The OS/SQL is 64BIT.
Thanks for the help in advance.
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Aug 3, 2007
Howdy folks! (I feel im creating too many topics...but all my questions are unrelated :-/)
Dev environment: SSCE, Native c++ OLE code, Win CE 5
I have a routine that calculates the size of a set of columns in order to create a byte buffer for retrieving data from an IRowset and inserting it into a custom class. This method works great for all data types except ntext. When I look at the column information from an ntext field, the DBCOLUMNINFO::ulColumnSize member holds 536,870,911 (the max length of an ntext type). Obviously I dont want to allocate 1GB of memory for each ntext column. Is there anyway (natively) to determine the actual number of characters in a field?
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May 19, 2015
DELETE FROM Report_temp2
WHERE MSSalesID in
( Select Report_temp.MSSalesID FROM Report_temp)
DELETE FROM Report_temp
WHEREMSDate < '2015-07-01'
Actually the year stating form july.
Q1 is july,aug,sep.
Q2 is oct nov,dec.
Q3 is jan,feb,mar.
Q4 is april, may,june.
So what I need is dynamically I want to delete the data every year prior to current year.
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Nov 16, 2015
I need to look at all tables in a database that has a column name of GEO
Then look for all values in each table where the GEO value is NULL and delete each of the records found...
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Sep 8, 2015
I am querying with a SELECT statement against an address table that has a post code column with corrupt data.
Sample record:- Northants NN4 0NB
Should be NN4 0NB
I have used the following on another column:-
LEFT(A.Addr1,CASE WHEN CHARINDEX ('(', A.Addr1) =0 THEN LEN(A.Addr1) ELSE CHARINDEX('(' ,A.Addr1) -1 END) AS 'Address 1'
but unable to correct this problem?
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Oct 26, 2004
Hi,
On my aspx Web page, I want to delete a member from database table 'tblMember', but if this MemberID is used as FK in another table, I want to display a user friendlier message like "You cannot delete this member, ....." I am using Try, Catch blocks in my Web Page.
Currently it display this message:
"DELETE statement conflicted with COLUMN REFERENCE constraint 'FK_..._....' The conflict occurred in database '...', table 'tblMembers', column 'MemberID'. The statement has been terminated. "
So how should I precisely trap this error? Does anybody know what Exception is it? or what error number in SQL server?
Thanks
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Feb 4, 2015
I have these two tables Log and CategoryLog, I need to archive records older than 13 months in these two tables to two separate tables and then delete the archived records from Log and CategoryLog tables. The problem is that only 'Log' table has a date column, the other table CategoryLog does not have any date column. But the two tables are connected by a column(LogID). How to archive the data and then delete the archive data from both tables.
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Jul 25, 2015
I have a four tables called plandescription, plandetail and analysisdetail. The table plandescription has the columns DetailQuestionID which is the primary and identity column and a QuestionDescription column.
The table plandetail consists of the column PlanDetailID which the primary and identity column, DetailQuestionID which is the foreign key attribute of plandescription table and a planID column.
The third table analysisdetail consists of a analysisID which the primary and identity column, PlanDetailID which is the foreign key attribute of plandetail table and a scenario.
Below is the schema of the three tables
I have a two web form that will insert, update and delete data into these three tables in a two transaction. One web form will perform CRUD operations in plandescription and plandetail table. When the user inserts QuestionDescription and planid in this web form, I will insert the QuestionDescription Value in the plandescription table and will generate a DetailQuestionID value and this value is fed to the plandetail table with the planid. Here I will generate a PlanDetailID.
Once this transaction is done, I will show the second web form in which the user enters the scenario and this will be mapped with the plandescription using the PlanDetailID.
This schema cannot be changes as this is the client requirement. When I insert values I don’t have any problem. However when I update existing data, I need to delete existing PlanDetailID in the plandetail table and recreate PlanDetailID data for that DetailQuestionID and planID. This is because, the user will be adding or deleting a planID associated with the QuestionDescription.
Once I recreate PlanDetailID for that DetailQuestionID and planID, I need to update the old PlanDetailID with the new PlanDetailID in the third table analysisdetail for the associated analysisID.
I created a #Temp table called #DetailTable to insert the values analysisID, planid and old PlanDetailID and new PlanDetailID so that I can have them in update statement once I delete the data from plandetail table for that PlanDetailID.
Then I deleted the plandetailid from the plandetail table and recreate PlanDetailID for that DetailQuestionID. During my recreation I fetched the new PlanDetailID’s created into another temp table called #InsertedRows
After this I am running a while loop to update the temp table #DetailTable with the newly created PlanDetailID for the appropriate planID’s. The problem is here. When I have the same number of planID’s for example 2 planID’s 1,2 I will have only two old PlanDetailID and new PlanDetailID for that planID and analysisID.But When I add a new PlanID or remove a existing planID I am getting null value for that newly added or deleted planID. This is affecting my update statement of analysisdetail table as PlanDetailID cannot be null.
I tried to remove the Null value from the #DetailTable by running the update statement of analysis detail in a while loop however its not working.
DECLARE @categoryid INT = 8
DECLARE @DetailQuestionID INT = 1380
/*------- I need the query to run for the below three data.
Here i'm updating my planids that already exists in my database*/
DECLARE @planids VARCHAR(MAX) = '2,4,5'
[code].....
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Jun 29, 2015
I need to delete records from a table (Table1) which has a foreign key column in a related table (Table2).
Table1 columns are: table1Id; Name. Table2 columns include Table2.table1Id which is the foreign key to Table1.
What is the syntax to delete records from Table1 using Table1.Name='some name' and remove any records in Table2 that have Table2.table1Id equal to Table1.table1Id?
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May 25, 2000
Hello,
This probably has been addressed before but I was unable to get the search to work properly on this site.
I am needing a script/way of deleting all rows from a DB with the exception of one record left for each row that has duplicate column data. Example :
Row 1
Field1 = 12345 Field2 =xxxxx Field 3=yyyyy Field4=zzzzz etc.
Row 2
Field1 = 12345 Field2 =zzzzzz Field 3=xxxxxx Field4=yyyyyy etc.
Row3
Field1 = 12345 Field2 =20202 Field 3=11111 Field4=zzzzz etc.
Row 4
Field1 = 54321 Field2 =xxxxx Field 3=yyyyy Field4=zzzzz etc.
Etc. Etc.
I want to be able to find the duplicates for Field1 and then delete all but 1 of those rows.( I don't care which one I keep just so only one is left.) The data in the other fields may or may not be unique.
I know how to find the duplicates it's just the deleting part I am having problems with. Any help would be much appreciated. Thanks,
Kerry
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Jul 27, 2006
Hi all--I'm trying to convert a function which I inherited from a SQL Server 2000 DTS package to something usable in an SSIS package in SQL Server 2005. Given the original code here:
Function Main()
on error resume next
dim cn, i, rs, sSQL
Set cn = CreateObject("ADODB.Connection")
cn.Open "Provider=sqloledb;Server=<server_name>;Database=<db_name>;User ID=<sysadmin_user>;Password=<password>"
set rs = CreateObject("ADODB.Recordset")
set rs = DTSGlobalVariables("SQLstring").value
for i = 1 to rs.RecordCount
sSQL = rs.Fields(0).value
cn.Execute sSQL, , 128 'adExecuteNoRecords option for faster execution
rs.MoveNext
Next
Main = DTSTaskExecResult_Success
End Function
This code was originally programmed in the SQL Server ActiveX Task type in a DTS package designed to take an open-ended number of SQL statements generated by another task as input, then execute each SQL statement sequentially. Upon this code's success, move on to the next step. (Of course, there was no additional documentation with this code. :-)
Based on other postings, I attempted to push this code into a Visual Studio BI 2005 Script Task with the following change:
public Sub Main()
...
Dts.TaskResult = Dts.Results.Success
End Class
I get the following error when I attempt to compile this:
Error 30209: Option Strict On requires all variable declarations to have an 'As' clause.
I am new to Visual Basic, so I'm on a learning curve here. From what I know of this script:
- The variables here violate the new Option Strict On requirement in VS 2005 to declare what type of object your variable is supposed to use.
- I need to explicitly declare each object, unless I turn off the Option Strict On (which didn't seem recommended, based on what I read).
Given this statement:
dim cn, i, rs, sSQL
I'm looking at "i" as type Integer; rs and sSQL are open-ended arrays, but can't quite figure out how to read the code here:
Set cn = CreateObject("ADODB.Connection")
cn.Open "Provider=sqloledb;Server=<server_name>;Database=<db_name>;User ID=<sysadmin_user>;Password=<password>"
set rs = CreateObject("ADODB.Recordset")
This code seems to create an instance of a COM component, then pass provider information and create the recordset being passed in by the previous task, but am not sure whether this syntax is correct for VS 2005 or what data type declaration to make here. Any ideas/help on how to rewrite this code would be greatly appreciated!
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Mar 28, 2007
Dear Friends,
I am having 2 Tables.
Table 1: AddressBook
Fields --> User Name, Address, CountryCode
Table 2: Country
Fields --> Country Code, Country Name
Step 1 : I have created a Cube with these two tables using SSAS.
Step 2 : I have created a report in SSRS showing Address list.
The Column in the report are User Name, Address, Country Name
But I have no idea, how to convert this Country Code to Country name.
I am generating the report using the Layout tab. ( Data | Layout | Preview ) Report1.rdl [Design]
Anyone help me to solve this issue. Because, in our project most of the transaction tables have Code and Code description in master table. I need to convert all code into corresponding description in all my reports.
Thanks in advance.
Regards
Ramakrishnan
Singapore
28 March 2007
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Sep 11, 2015
I have some simple files but they are failing because the delete history task is failing as it is looking for files in a non existent directory.
It is looking for files in C:Program FilesMicrosoft SQL ServerMSSQL10_50.INSTANCEMSSQLLog whereas it should be looking in C:Program FilesMicrosoft SQL ServerMSSQL10_50.MSSQLSERVERMSSQLLog
how I can get this corrected so I can get the Maintenance Plans to run correctly.
I have tried deleting and recreating the Plan but to no avail
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May 19, 2012
I am using Master Data Service for couple of months now. I can load, update, merge and soft delete data in MDS. Occasionally we even have to hard delete data from MDS. If we keep on soft deleting records in a MDS table eventually there will be huge number of soft deleted records. Is there an easy way to hard delete all the soft deleted records from all MDS tables in a specific Model.
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Oct 23, 2004
Hello:
Need some serious help with this one...
Background:
Am working on completing an ORM that can not only handles CRUD actions -- but that can also updates the structure of a table transparently when the class defs change. Reason for this is that I can't get the SQL scripts that would work for updating a software on SqlServer to be portable to other DBMS systems. Doing it by code, rather than SQL batch has a chance of making cross-platform, updateable, software...
Anyway, because it needs to be cross-DBMS capable, the constraints are that the system used must work for the lowest common denominator....ie, a 'recipe' of steps that will work on all DBMS's.
The Problem:
There might be simpler ways to do this with SqlServer (all ears :-) - just in case I can't make it cross platform right now) but, with simplistic DBMS's (SqlLite, etc) there is no way to ALTER table once formed: one has to COPY the Table to a new TMP name, adding a Column in the process, then delete the original, then rename the TMP to the original name.
This appears possible in SqlServer too --...as long as there are no CASCADE operations.
Truncate table doesn't seem to be the solution, nor drop, as they all seem to trigger a Cascade delete in the Foreign Table.
So -- please correct me if I am wrong here -- it appears that the operations would be
along the lines of:
a) Remove the Foreign Key references
b) Copy the table structure, and make a new temp table, adding the column
c) Copy the data over
d) Add the FK relations, that used to be in the first table, to the new table
e) Delete the original
f) Done?
The questions are:
a) How does one alter a table to REMOVE the Foreign Key References part, if it has no 'name'.
b) Anyone know of a good clean way to get, and save these constraints to reapply them to the new table. Hopefully with some cross platform ADO.NET solution? GetSchema etc appears to me to be very dbms dependant?
c) ANY and all tips on things I might run into later that I have not mentioned, are also greatly appreciated.
Thanks!
Sky
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Nov 13, 2006
I am having great difficulty with cascading deletes, delete triggers and referential integrity.
The database is in First Normal Form.
I have some tables that are child tables with two foreign keyes to two different parent tables, for example:
Table A
/
Table B Table C
/
Table D
So if I try to turn on cascading deletes for A/B, A/C, B/D and C/D relationships, I get an error that I cannot have cascading delete because it would create multiple cascade paths. I do understand why this is happening. If I delete a row in Table A, I want it to delete child rows in Table B and table C, and then child rows in table D as well. But if I delete a row in Table C, I want it to delete child rows in Table D, and if I delete a row in Table B, I want it to also delete child rows in Table D.
SQL sees this as cyclical, because if I delete a row in table A, both table B and table C would try to delete their child rows in table D.
Ok, so I thought, no biggie, I'll just use delete triggers. So I created delete triggers that will delete child rows in table B and table C when deleting a row in table A. Then I created triggers in both Table B and Table C that would delete child rows in Table D.
When I try to delete a row in table A, B or C, I get the error "Delete Statement Conflicted with COLUMN REFERENCE". This does not make sense to me, can anyone explain? I have a trigger in place that should be deleting the child rows before it attempts to delete the parent row...isn't that the whole point of delete triggers?????
This is an example of my delete trigger:
CREATE TRIGGER [DeleteA] ON A
FOR DELETE
AS
Delete from B where MeetingID = ID;
Delete from C where MeetingID = ID;
And then Table B and C both have delete triggers to delete child rows in table D. But it never gets to that point, none of the triggers execute because the above error happens first.
So if I then go into the relationships, and deselect the option for "Enforce relationship for INSERTs and UPDATEs" these triggers all work just fine. Only problem is that now I have no referential integrity and I can simply create unrestrained child rows that do not reference actual foreign keys in the parent table.
So the question is, how do I maintain referential integrity and also have the database delete child rows, keeping in mind that the cascading deletes will not work because of the multiple cascade paths (which are certainly required).
Hope this makes sense...
Thanks,
Josh
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Nov 17, 2006
I'm trying to clean up a database design and I'm in a situation to where two tables need a FK but since it didn't exist before there are orphaned records.
Tables are:
Brokers and it's PK is BID
The 2nd table is Broker_Rates which also has a BID table.
I'm trying to figure out a t-sql statement that will parse through all the recrods in the Broker_Rates table and delete the record if there isn't a match for the BID record in the brokers table.
I know this isn't correct syntax but should hopefully clear up what I'm asking
DELETE FROM Broker_Rates
WHERE (Broker_Rates.BID <> Broker.BID)
Thanks
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