Best way to find EOF Record using OleDbCommand ?

[Java]

You can use Find method.

Javed.

 

[William \(Bill\) Vaughn]

First, I would not approach the problem as you have done. I would execute a
query that does both operations in one step.

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[William \(Bill\) Vaughn]

I would not take this approach. I suggest creating an INSERT query that
contains the needed new row values as parameters and include a WHERE clause
that inserts the row if it does not already exist (WHERE NOT EXISTS) based
on the primary key. That's because even if you query to see if a row is
there or not, by the time you turn around and actually do the INSERT, it
might have been added.

hth

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____________________________________
Bill Vaughn
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Please reply only to the newsgroup so that others can benefit.
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[ItsMe]

Hi,

I want to check whether the record exist or not based on my query, so i'll
be using OleDbCommand.
What is the best way to check on a huge table ? I used to write like this in
VB6.0...

---------------------------------------------------
Public Function SaveOrUpdate() As Boolean
sSQL = "SELECT * FROM AdmAllergy WHERE " & _
" CompanyCode = " & mQuotedStr(mCompanyCode) & _
" AND BranchCode = " & mQuotedStr(mBranchCode) & _
" AND Code = " & mQuotedStr(sCode)
Set oRs = TmpAdoSet(sSQL)
With oRs
If .EOF And .BOF Then
.AddNew
.Fields("CompanyCode") = Trim(mCompanyCode)
.Fields("BranchCode") = Trim(mBranchCode)
.Fields("Code") = Trim(sCode)
.Fields("CreatedBy") = Trim(mUserId)
Else
.Fields("EditedBy") = Trim(mUserId)
.Fields("EditedDate") = Format(Now, "yyyy-mm-dd hh:mm:ss")
End If
.Fields("Name") = Trim(Name)
.UpdateBatch
.Close
End With
SaveOrUpdate = True
Set oRs = Nothing
End Function
---------------------------------------------------

So, how do i write in VB.Net ? Want to open check record exist or not. If
exist then update other fields
or else add new record. I prefer to use OleDbCommand.

Any Help ?

Regards


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[ItsMe]

Javed,

Can you please give me an example. I'm a newbie in .NET. I apologize, if i
ask you guyz too much

Regards

 

[ItsMe]

William,

Can you please give me a simple example. ?

regards

 

[William \(Bill\) Vaughn]

INSERT INTO [biblio].[dbo].[Authors]([Au_ID], [Author], [Year_Born])
VALUES(@Au_ID, @Author, @Year_Born)
WHERE (NOT EXISTS (SELECT AU_ID FROM Authors WHERE AU_ID = @AU_ID)

hth

--
____________________________________
Bill Vaughn
www.betav.com
Please reply only to the newsgroup so that others can benefit.
This posting is provided "AS IS" with no warranties, and confers no rights.
__________________________________

 

[Norman Yuan]

I didn't know that you can follow a "INSERT INTO...VALUES..." with a
"WHERE..." clause, at least it is not mentioned in all books that I have.

INSERT INTO [biblio].[dbo].[Authors]([Au_ID], [Author], [Year_Born])
VALUES(@Au_ID, @Author, @Year_Born)
WHERE (NOT EXISTS (SELECT AU_ID FROM Authors WHERE AU_ID = @AU_ID)

hth

--
____________________________________
Bill Vaughn
www.betav.com
Please reply only to the newsgroup so that others can benefit.
This posting is provided "AS IS" with no warranties, and confers no rights.
__________________________________

William,

Can you please give me a simple example. ?

regards


so
i'll not.
If

 

[ItsMe]

William,

I got it. Thank you very much.

Regards

INSERT INTO [biblio].[dbo].[Authors]([Au_ID], [Author], [Year_Born])
VALUES(@Au_ID, @Author, @Year_Born)
WHERE (NOT EXISTS (SELECT AU_ID FROM Authors WHERE AU_ID = @AU_ID)

hth

--
____________________________________
Bill Vaughn
www.betav.com
Please reply only to the newsgroup so that others can benefit.
This posting is provided "AS IS" with no warranties, and confers no rights.
__________________________________

William,

Can you please give me a simple example. ?

regards


so
i'll not.
If

 

[JerryK]

Look up Subselect in the books your using.

I didn't know that you can follow a "INSERT INTO...VALUES..." with a
"WHERE..." clause, at least it is not mentioned in all books that I have.

INSERT INTO [biblio].[dbo].[Authors]([Au_ID], [Author], [Year_Born])
VALUES(@Au_ID, @Author, @Year_Born)
WHERE (NOT EXISTS (SELECT AU_ID FROM Authors WHERE AU_ID = @AU_ID)

hth

--
____________________________________
Bill Vaughn
www.betav.com
Please reply only to the newsgroup so that others can benefit.
This posting is provided "AS IS" with no warranties, and confers no rights.
__________________________________

William,

Can you please give me a simple example. ?

regards


I would not take this approach. I suggest creating an INSERT query that
contains the needed new row values as parameters and include a WHERE
clause
that inserts the row if it does not already exist (WHERE NOT EXISTS) based
on the primary key. That's because even if you query to see if a row is
there or not, by the time you turn around and actually do the

INSERT,

it for
the

recipient

of may
not