Solved

about the query in ADO

Posted on 1998-06-01
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Last Modified: 2010-05-03
After creating a query, something like

Set OldDb = OpenDatabase("c;\file.mdb")
Set NewQry = OldDb.CreateQueryDef("Qry1")
NewQry.SQL = "select * from table1 where field1 like '*1*'"

How to access the selected records? Say debug.print first record.

Moreover, why not use

Set OldDb = OpenDatabase("c;\file.mdb")
Set NewSet = OldDb.OpenRecordset("select * from table1 where field1 like '*1*'")

which looks much easy and one may directely assess the selected records by the recordset.

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Question by:victorlong
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Sekans earned 50 total points
ID: 1462254
victorlong,
To access the selected records, you would simply need to create a recordset, like this:

Set NewSet=OldDb.OpenRecordset("Qry1")

Then just move through the recordset:

NewSet.MoveFirst
Do Until NewSet.EOF = True
     'Do something
NewSet.MoveNext

Second question,
    I would indeed use the openrecordset with a SQL statement.

Regards,
Sekans
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Expert Comment

by:Sekans
ID: 1462255
Sorry, I left the Loop off of the Do...Loop, it should look like this.

Do Until NewSet.EOF = True
     'Do something
      NewSet.MoveNext
Loop

Sekans
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Author Comment

by:victorlong
ID: 1462256
Thank you Sekans. I want to make sure that

1. We can do:

   Set NewQry = OldDb.CreateQueryDef("Qry1")
   NewQry.SQL = "select * from table1 where field1 like '*1*'"
   Set NewSet = OldDb.OpenRecordset("Qry1")

2. The above is the same as:

   Qry2 = "select * from table1 where field1 like '*1*'"
   Set NewSet = OldDb.OpenRecordset(Qry2)

3. You like the second method.

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Expert Comment

by:Sekans
ID: 1462257
1. Yes, this will create a new query object in the specified database, then return the records based on that query.

2. The two methods are almost the same.  The difference is, the first method actually creates a new query object in your database, while the second, only returns the desired records.  

3. Other experts may disagree, but I definately prefer the second method.  I don't see why you should junk up your database with queries, when you don't need to.  As you can see, the difference in code is minimal.

Hope this helps,
Sekans
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Author Comment

by:victorlong
ID: 1462258
Hi Sekans

Thank you for your help.
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Expert Comment

by:Sekans
ID: 1462259
Your very welcome,
Sekans
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