Update Function: Why SQL Server Update An Empty String With 0?

May 13, 2008

I'm new to this forum.

This 'problem' has occured many times, but I've always found a way around it.

I have pages with datagrids, in which a user can edit a certain fields and then update the tables with new data. Lets say when a user edit a Name field and a money field. If he/she left those two fields blank, the table is automatically updated with a <null> (for the name field) and a 0 (for the money field.) Both these columns were set up to allow Null values.

Anyone has an idea why they were updated that way? And is there like a standard on how the data types are updated if a field is left blank?

Thank you very much.

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How To Update An Empty Date-type Field

May 23, 2006

Hi,
I have update function that updating sql database table.
In the table I have fields like: name, address, phone, …, install_date
 
updateScreen(txtSName.text, txtSLocation.text, txtSPhone.text, txtSAddress.text, txtSPostal.text, ddSCity.SelectedItem.text, ddSCountry.SelectedItem.text, txtSOwner.text, txtSInstall.text )
 
The function work fine except the part whent install_date field is empty then I have the following message:
 
System.InvalidCastException: Conversion from string "" to type 'Date' is not valid.
 
Ii would like to use the same update function to make an updates even when date field is empty.
 
If someone has any idea how make it work, I would appreciate that
    
Alex

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Update On Machine Runs Immediately, Update On Linked Server Takes 8 Minutes

Jan 2, 2008

What's up with this?

This takes like 0 secs to complete:

update xxx_TableName_xxx
set d_50 = 'DE',modify_timestamp = getdate(),modified_by = 1159

where enc_id in

('C24E6640-D2CC-45C6-8C74-74F6466FA262',

'762E6B26-AE4A-4FDB-A6FB-77B4782566C3',

'D7FBD152-F7AE-449C-A875-C85B5F6BB462')

but From linked server this takes 8 minutes????!!!??!:

update [xxx_servername_xxxx].xxx_DatabaseName_xxx.dbo.xxx_TableName_xxx
set d_50 = 'DE',modify_timestamp = getdate(),modified_by = 1159

where enc_id in

('C24E6640-D2CC-45C6-8C74-74F6466FA262',

'762E6B26-AE4A-4FDB-A6FB-77B4782566C3',

'D7FBD152-F7AE-449C-A875-C85B5F6BB462')


What settings or whatever would cause this to take so much longer from the linked server?

Edit:
Note) Other queries from the linked server do not have this behavior. From the stored procedure where we have examined how long each query/update takes... this particular query is the culprit for the time eating. I thought it was to do specefically with this table. However as stated when a query window is opened directly onto that server the update takes no time at all.

2nd Edit:
Could it be to do with this linked server setting?
Collation Compatible
right now it is set to false? I also asked this question in a message below, but figured I should put it up here.

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SQL Server 2000 - Issue W/ UPDATE - Single Row Update Returns 2 Different Messages

Nov 11, 2007

I am hoping someone can shed light on this odd behavior I am seeing running a simple UPDATE statement on a table in SQL Server 2000.  I have 2 tables - call them Table1 and Table2 for now (among many) that need to have certain columns updated as part of a single transaction process.   Each of the tables has many columns. I have purposely limited the target column for updating to only ONE of the columns in trying to isolate the issue.  In one case the UPDATE runs fine against Table1... at runtime in code and as a manual query when run in QueryAnalyzer or in the Query window of SSManagementStudio - either way it works fine. 
However, when I run the UPDATE statement against Table2 - at runtime I get rowsaffected = 0 which of course forces the code to throw an Exception (logically).  When I take out the SQL stmt and run it manually in Query Analyzer, it runs BUT this is the output seen in the results pane...
(0 row(s) affected)
(1 row(s) affected)
How does on get 2 answers for one query like this...I have never seen such behavior and it is a real frustration ... makes no sense.  There is only ONE row in the table that contains the key field passed in and it is the same key field value on the other table Table1 where the SQL returns only ONE message (the one you expect)
(1 row(s) affected)
If anyone has any ideas where to look next, I'd appreciate it.
Thanks 
 

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SQL Server 2008 :: Update Null Enabled Field Without Interfering With Rest Of INSERT / UPDATE

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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SQL Server 2008 :: Normalizing Data Prior To Migration (Update String To Remove Special Characters)

Aug 21, 2015

I'm presented with a problem where I have a database table which must be migrated via a "custom tool", moving the data into a new table which has special character requirements that didn't exist in the source database. My data resides in an SQL Server 2008R2 instance.

I envision a one-time query which will loop through selected records and replace the offending characters with --, however I'm having trouble understanding how this works.

There are roughly 2500 records which meet the criteria of "contains bad characters", frequently containing multiple separate bad chars, and the table contains roughly 100000 rows.

Special Characters are defined as #%&*:<>?/{}|~ and ..

While the field is called "Filename" it isn't always so, it is a parent/child table where foldernames are also stored.

Example data:
Tablename = Items
ItemID Filename ListID
1 Badfile<2015>.docx 15
2 Goodfile.docx 15
3 MoreBad#.docx 15
4 Dog&Cat#17.pdf 15
5 John's "Special" Folder 16

The examples I'm finding are all oriented around SELECT statements, to change the output of what I see returned, however I'd rather just fix the entire column using an UPDATE. Initial testing using REPLACE fails because I don't always have a single character as the bad thing in a string.

In a better solution, I found an example using a User Defined Function to modify the output of a select, but I cannot use that UDF in an UPDATE.

My alternative is to learn enough C# to modify the "migration tool" to do this in-transit, but I know even less about C# than I do of SQL.

I gather I want to use @@ROWCOUNT to loop through the rows but I really can't put it all together in a cohesive way.

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Feb 1, 2015

I have one table1 which contain data like this
ID --- year --- months
1 --- 2015 --- null

table2 like this
ID --- Year --- months
1 --- 2015 --- 6
1 --- 2015 --- 7

I want to update the max value of month for id 1,which is 7 using update function, How can i do this.

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Jul 20, 2005

Take a table, where not all the columns are populated:CREATE TABLE #T (A int, B int, C int, D int)INSERT #T (A,B) VALUES (1,2)INSERT #T (A,B) VALUES (3,4)INSERT #T (A,B) VALUES (5,6)INSERT #T (A,B) VALUES (7,8)INSERT #T (A,B) VALUES (9,10)The values for C and D can be computed as functions of A and B. For thisexample, let's say they are twice A and three times B, respectively:CREATE FUNCTION dbo.F(@A int,@B int)RETURNS @Tbl TABLE (X int, Y int)AS BEGININSERT @Tbl (X,Y) VALUES (@A*2, @B*3)RETURNENDNow we use the function to compute the other columns:UPDATE #T SET C=X, D=YFROM dbo.F(A,B)Right? Well, no. Instead, I get this message:Server: Msg 155, Level 15, State 1, Line 2'A' is not a recognized OPTIMIZER LOCK HINTS option.Any suggestions? I would like to use this structure, if possible.Jim GeissmanCountrywide Home Loans

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UPDATE From A Function In CLR

Feb 14, 2008


I have been trying to get a function to UPDATE a row in the database. I know that this is not supported but by using code from a previous post this can be accomplished [See my code below].

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1863258&SiteID=1





Code Snippet
[SqlFunction(DataAccess = DataAccessKind.Read)]
public static int GetNextValue(string dbName)
{
int rows = 0;
lock (obj)
{
SqlPipe sp = SqlContext.Pipe;
using (SqlConnection conn = new SqlConnection("context connection=true"))
{
SqlCommand cmd = new SqlCommand("SELECT id FROM Items", conn);
conn.Open();
rows = int.Parse(cmd.ExecuteScalar().ToString()) + 1;
using (SqlConnection updateCon = new SqlConnection("Data Source=" + Environment.MachineName + ";Initial Catalog=" + dbName + ";Integrated Security=True;Pooling=False"))
{
SqlCommand updateCmd = new SqlCommand("UPDATE Items SET id=" + rows,updateCon);
updateCon.Open();
updateCmd.ExecuteScalar();
updateCmd.Dispose();
}

return rows;
}
}






I hope this is helpful.

Regards

tribal

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Jan 29, 2008

Can someone please tell me why in the bloody hell this isnt working? It ignores the WHERE VENDORID match portion and marks all instances of USERID match to TRUE. I've been banging my head for an hour... have I really forgotten basic sql???!!!!public static void UpdateVendor(VendorEvaluationEntity VEE)
{int vendorid = Convert.ToInt32(VEE.VendorevalVendor);
int userid = Convert.ToInt32(VEE.VendorevalUser);SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["VendorEvaluationConnectionString"].ConnectionString);
SqlCommand cmd = new SqlCommand("Update tblVendorUser set vendoruser_vendor_evaluated = 'true' where (vendoruser_vendor_id = @vendorid) and (vendoruser_user_id=@userid)", conn);SqlParameter pmvendorid = new SqlParameter();
SqlParameter pmuserid = new SqlParameter();pmvendorid.ParameterName = "@vendorid";pmvendorid.SqlDbType = SqlDbType.Int;
pmvendorid.Value = vendorid;
pmuserid.ParameterName = "@userid";pmuserid.SqlDbType = SqlDbType.Int;
pmuserid.Value = userid;
cmd.Parameters.Add(pmvendorid);
cmd.Parameters.Add(pmuserid);
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
 
}

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Trigger And Update() Function!

Jun 28, 1999

In the SQL 7.0 Documentation is indicated that the UPDATE(<fieldname>), if
used in a isert/update trigger, it return TRUE or FALSE based on presence of <field> in the SET List, if the trigger was fired by an UPDATE operation, or in the list of field to fill, if the trigger was fired by an INSERT operation.

Below there is a piece of code that demostrate the false documentation
assertion in the case of a trigger fired by an INSERT operation, infact even
if i have specified only the FIELD1 in INSERT Statement the trigger Print in the screen that i have touched FIELD2 too.

Now the SP1 don't solve this BUG, even if i had read some month ago (before
that SP1 was out) that in SP1 this will be fixed!

Anyone Can Help me to solve this problem, indicating me where i can post the
problem to sensitize the Microsoft's Service Pack Factory ?

Thank in Advance

PS:Sorry for my Bad English .... correct me please if some part are not
readable!

------[Cut Here]-------------------

CREATE TABLE TEST (FIELD1 INTEGER , FIELD2 INTEGER )
GO

CREATE TRIGGER TriggerIU_Test
ON TEST
FOR INSERT, UPDATE
AS

IF UPDATE(FIELD1) PRINT 'Field 1 Touched'

IF UPDATE(FIELD2) PRINT 'Field 2 Touched'
GO

print 'InsertIng '
INSERT INTO TEST (FIELD1) VALUES (2)

print 'Updating '
UPDATE TEST set FIELD1 = 1

GO
DROP TABLE TEST
------[Cut Here]-------------------

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Urgent : Update() Function

Jun 2, 2000

IF OBJECT_ID('dbo.TestTrigger') IS NOT NULL
BEGIN
DROP TABLE dbo.TestTrigger
IF OBJECT_ID('dbo.TestTrigger') IS NOT NULL
PRINT '<<< FAILED DROPPING TABLE dbo.TestTrigger >>>'
ELSE
PRINT '<<< DROPPED TABLE dbo.TestTrigger >>>'
END
go
CREATE TABLE dbo.TestTrigger
(
colA int NULL,
colB int NULL
)
go
IF OBJECT_ID('dbo.TestTrigger') IS NOT NULL
PRINT '<<< CREATED TABLE dbo.TestTrigger >>>'
ELSE
PRINT '<<< FAILED CREATING TABLE dbo.TestTrigger >>>'
go


IF OBJECT_ID('dbo.TestTrigger_i') IS NOT NULL
BEGIN
DROP TRIGGER dbo.TestTrigger_i
IF OBJECT_ID('dbo.TestTrigger_i') IS NOT NULL
PRINT '<<< FAILED DROPPING TRIGGER dbo.TestTrigger_i >>>'
ELSE
PRINT '<<< DROPPED TRIGGER dbo.TestTrigger_i >>>'
END
go
CREATE TRIGGER dbo.TestTrigger_i
ON dbo.TestTrigger
FOR INSERT AS

IF UPDATE(colA)
select "updating col A"

IF UPDATE(colB)
select "updating col B"

go
go
IF OBJECT_ID('dbo.TestTrigger_i') IS NOT NULL
PRINT '<<< CREATED TRIGGER dbo.TestTrigger_i >>>'
ELSE
PRINT '<<< FAILED CREATING TRIGGER dbo.TestTrigger_i >>>'
go



insert into TestTrigger
(colA)
values
(1)
go

insert into TestTrigger
(colA, colB)
values
(2,3)
go

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Mar 14, 2000

I have an application which uses DTS to import data. After the data is imported the transaction logs are no good since the import wasn't logging.
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Thanks

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Mar 8, 2004

I am trying to write an update statement based on an aggregate and it will not let me. Please find below the SQL.

update abtimesummary
set hours = sum(a.hours)
from abtimestore a
join abtimesummary b
on (cast(a.weekno as varchar(10)))+'-'+(cast(a.empno as varchar(10))) = b.summaryid

and this is the error message:

Server: Msg 157, Level 15, State 1, Line 2
An aggregate may not appear in the set list of an UPDATE statement.

Can someone tell me how to get round this please?

Many thanks

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Jul 23, 2005

Table test2 has multiple amounts for each account, I would like to sumthe amounts for the same account and use the result to update thevariable 'tot_amount' in table test1. But SQL does not allow me to usesum function in update. Is there any other way to do this? Thanks.update test1set tot_amount=sum(b.amount)from test1 as ajoin test2 as bon a.acc_no=b.acc_no

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Feb 13, 2006

We have the following two tables :

Link  ( GroupID int , MemberID int )
Member ( MemberID int , MemberName varchar(50), GroupID varchar(255) )

The Link table contains the records showing which Member is in which Group. One particular Member can be in
multiple Groups and also a particular Group may have multiple Members.

The Member table contains the Member's ID, Member's Name, and a Group ID field (that will contains comma-separated
Groups ID, showing in which Groups the particular Member is in).

We have the Link table ready, and the Member table' with first two fields is also ready. What we have to do now is to
fill the GroupID field of the Member table, from the Link Table.

For instance,

Read all the GroupID field from the Link table against a MemberID, make a comma-separated string of the GroupID,
then update the GroupID field of the corresponding Member in the Member table.

Please help me with a sql query or procedures that will do this job. I am using SQL SERVER 2000.

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May 22, 2008

Here is the example:

I have two tables. One has Projects with the total amt of hours worked on the project itself. The other is an Employee_Projects table with individual rows of hrs per employee worked on the above referenced projects.

I need to SUM all the hrs from the Employee_Projects table and GROUP BY project number, then UPDATE the Projects table with the sum of hours where the Project Number from table A matches the Project Number from table B.

Of course, you cant use an aggregate function in an UPDATE clause, so what would be the easiest way to do this??

Any help would be much appreciated.

-C

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Jan 22, 2004

I'm trying to update a varchar field using SUM. I keep getting the error that the sub query returns more than one value.

UPDATE CIRSUB_M
SET TRM_DMO = SUBSTRING(TRM_DMO,1,11) +
(SELECT CAST(SUM(COPIES) AS VARCHAR(5)) FROM CIRSUB_M
WHERE BIL_ORG = '02' AND CRC_STS IN ('R','P','Q','T')
GROUP BY PUB_CDE, DNR_NBR)
WHERE BIL_ORG = '02' AND CRC_STS IN ('R','P','Q','T')

Example

PUB_CDE DNR_NBR COPIES TRM_DMO
THN 000000092637 100 A
THN 000000092637 200 B
THN 000000082455 100 A
THN 000000082455 200 B
THN 000000051779 100 A

Updated
THN 000000092637 100 A300
THN 000000092637 200 B300
THN 000000082455 100 A300
THN 000000082455 200 B300
THN 000000051779 100 A100

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Feb 5, 2004

Folks

Here is a query which updates certain values. GetAddress is another
sproc which returns addrId. I have to pass certain values ie
strAddress1 strCity .....intZip4 values in the sproc GetAddress and execute the update query. In doing so it says GetAddress in
not a recognized function name. Is the syntax correct to exec sproc
GetAddress.


update Persons
set
Persons.strLastName=H.strLastName,
Persons.strNameSuffix=H.strNameSuffix,
Persons.lngHomeID= GetAddress (H.strAddress1,strAddress2,H.strCity,H.strState,H. strZip,H.intZip4),
Persons.lngMailID= GetAddress(H.strAddress1,strAddress2,H.strCity,H.s trState,H.strZip,H.intZip4)
from ALSHeadr H
where Persons.lngSSN=H.lngFedTaxID



FYI I can post GetAddress sproc but it is working properl.
I just want to know how to pass the values in ALSHeadr table into
the sproc.


Thanx

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Jan 7, 2015

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Before
ID NAME OrderNum
1 Pete WEB123
2 Paul WEB124
3 Sam WEB125
4 Tim WEB126

After
ID NAME OrderNum
1 Pete WEB123A
2 Paul WEB124A
3 Sam WEB125A
4 Tim WEB126A

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Mar 2, 2007

Problem is very simple

I want to update sum of a field from another table to first table

TABLE ONE:
==========
ItemID
QtyInStock


Table TWO:
==========
BatchID
ItemID
Qty

I want to Update the QtyInStock of First Table with Sum(Batch.Qty)

here is the query i am writing but giving error

UPDATE ITEMS
SET
INSTOCKQTY=CASE WHEN QtyInBatch>1 THEN QTYINBATCH ELSE 0 END
FROM ITEMS, (
SELECT ITEMS.ITEMID, SUM(Batch.Qty) AS QtyInBatch FROM Batch INNER JOIN Items ON Batch.ItemID = Items.ItemID GROUP BY ITEMS.ITEMID
)

appericiating anyones help in advance




FAZEEL AMJAD
Systems Engineer
Crystal Technologies

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SET rowcount 10000
UPDATE [dbo].[CC_Info_T]
SET [Acct_Num_CH] = 'ayIWt6C8sgimC6t61EJ9d8BB3+bfIZ8v'
WHERE [Acct_Num_CH] IS NOT NULL
WHILE @@ROWCOUNT > 0
BEGIN
SET rowcount 10000
UPDATE [dbo].[CC_Info_T]
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Afternoon all.
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[companyname]: 288asl | | 08/03/2007
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[companyname]: RES01sl | | 19/02/2004
[companyname]: AAsl | | 31/12/2005
[companyname]: 652Asl | | 05/02/2007
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[companyname]: AAsl | | 31/12/1999
[companyname]: 363asl | | 20/01/2007
[companyname]: 288b1sl | | 02/11/2006
[companyname]: 288bsl | | 02/11/2006
Now what has been happening is that is has not been putting the company name in the column, just the text companyname. Now i have a table which has the company name and company id, i can easily join the two tables together but how can i replace just the companyname text in the description column with leaving the text after.

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Jan 18, 2008

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table1
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2 1234, 2222
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table2
id: str:
1111 aaaa
2222 bbbb
3333 cccc
1234 qqqq
0123 oooo

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table1
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Jan 8, 2008

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Would appretiate an example if anyone knows how to manage this.

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Hi all,I have a
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This is the Code I Have, But it throws an exception

UPDATE rdm_comments SET commentinfo = commentinfo + 'additional info' where commentid=2356

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UPDATE Report

SET MSYear= casewhen MSDate > '2011/06/30' and MSDate < '2012/07/01' THEN '2012'
when MSDate > '2012/06/30' and MSDate < '2013/07/01' THEN '2013'
when MSDate > '2013/06/30' and MSDate < '2014/07/01' THEN '2014'
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when MSDate > '2015/06/30' and MSDate < '2016/07/01' THEN '2016'
when MSDate > '2016/06/30' and MSDate < '2017/07/01' THEN '2017'
End

Actually our business year starts from 1st july and for this code I need function which is dynamically updates the every year for example 2014-07-01 to 2015-06-30 this is called as a 2015 year like this I need function which will dynamically update a year.

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Hi.

I have an update statement that accepts
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terminates the sql update statement if there is
an apostrophe in it. so, headline='i like my brother's car"
willl terminate after "brother". "s car" is read as sql.

how is this resolved?



Code:


Dim MyCmd2 As New Data.SqlClient.SqlCommand("SET ANSI_WARNINGS OFF " & _
"UPDATE EditProfile " & _
"SET headline='"+ Me.tb_headline.Value+"', about_me='"+ Me.ta_aboutme.Value+"', edit_date='"+System.DateTime.Now.ToString+"' WHERE email_address='"+Context.User.Identity.Name.ToString+"' " & _
"SET ANSI_WARNINGS ON ", MyConn)

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