How to delete DataRow from access DataBase.

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Working on a window to manage admin logins.
I want a maximum of 5 signup in a way that the 6th one deletes the 1st DataRow from the DataBase.

SQL

query = "delete * from adminTable";

Is clearring all the rows from DataBase.
While

SQL

query = "delete * from adminTable where [USER NAMES] = 'singal' ";

Is clearring the row I've specified.
But I want the 1st row only, no matter what, to just get deleted.
Help please, thanks.

Posted 5-Jan-15 22:22pm

Salisu Shaibu

Updated 5-Jan-15 22:43pm

Leo Chapiro

v2

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Comments

ArunRajendra 6-Jan-15 4:24am

What fields do you have in your table? Give the design

Herman<T>.Instance 6-Jan-15 5:59am

What database? What tablestructrure?

Salisu Shaibu 6-Jan-15 6:53am

Hello Seniors.
I know you've come out to help me.
And I quite appreciate that.
But expect you to identify the DataTable and a field from the study of "query".
Unless their is something else you want to let me know.
Just make it plain please, I'm here to learn.
Nice attempt.
Thanks.

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CHill60 · Accepted Answer · 2015-01-05T22:53:00

Solution 1

Try the following:

DELETE FROM (SELECT TOP 1 * FROM adminTable)

MSAccess syntax is a little strange

An alternative if you have an AutoNumber ID field

DELETE FROM adminTable where ID = (SELECT MIN(ID) From adminTable)

but this is not good practice in multi-user environments

Posted 5-Jan-15 22:53pm

CHill60

Comments

Salisu Shaibu 6-Jan-15 7:24am

I applied the alternative query and got:
OleDbException was unhandled
Syntax error in FROM clause.

CHill60 6-Jan-15 8:23am

You will need to change "ID" to the name of your Autonumber id column

Salisu Shaibu 6-Jan-15 9:23am

Actually, I have ID column which was still AutoNumber and the primary key before the: Syntax error in FROM clause.
Thanks.

CHill60 6-Jan-15 10:38am

Puzzling ... I'm running that query in Access 2010 and it's working fine. It might be the Ole driver that is moaning rather than the Access syntax. You could try that query in Access directly to see if it works on your version - if not then the first option should... you could always add SORT BY ID to the bit in brackets.
If the 2nd option does work in Access but not via OleDb then try saving the query in Access and calling the query from C# instead of the in-line SQL (which is usually a good option anyway)

Salisu Shaibu 6-Jan-15 11:36am

I actually responded at about 1.5 hrs ago, I dont know why my phone refused to post my comment.
I was bussy using name of DataBase instead of TableName.
I didn't know what came over me.
Thanks man!
You're good.

CHill60 6-Jan-15 12:07pm

*chuckling* ... we've all done something like that at some time! ... and I often have problems posting comments with my phone too, so you're not alone :-)