Only select first row of repeating value in a column in SQL
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How can I select the entire row so that I can use the Column(0,Combo.listindex) value?
The SQL statement is a nested SELECT and the value selected in the combo box is the selection criteria in the inner select statement.
The problem is how to pass the value selected in the combo box to the SQL query.
Also, I have the following problem . When I call the SQL query by clicking a button, a window popups asking me to enter the value for the parameter. I don't want this popup to appear. What I want to achieve is that after the user selects a row in the combo box, I want the field value to be passed to the SQL statement's WHERE clause and the SQL should execute and display the rows selected.
When a user selects a value for Column A, I'd like the lookup query in Column B to show only values related to the value chosen for Column A. In other words,
SELECT OtherTable.AttrX FROM OtherTable WHERE OtherTable.AttrY = ColumnA;
I can't seem to get the WHERE clause to recognize the value chosen for Column A for the specific row of data being modified.
Is this a limitation of a lookup query in Access or I'
Obviously, getting it in the correct row is essential. The datatypes of the two columns are different. and the one I am copying from isnvarchar, with the data in this format:
1/7/2008 6:43:05 PM
I need to import these 2 columns into an Access table (2010).
I'm working on a method, but it feels like maybe I'm overthinking it. I've created a macro in Excel to copy column A & H to a new Excel workbook. Then I'm doing an import into Excel. Is there a way to do this directly through Access (without the Excel Macro)?
I want to retrieve the row with the LOWEST number, for a certain type. To make this search fast, there is an index in the table - sorting the rows by TypeField-NumberField.
I retrieve the row I want with this SQL-statement: "SELECT TOP 1 * FROM TableX WHERE TypeField='123' ORDER BY NumberField". The SQL parser should be able to find the row I want very quickly - using the index.
But this doesn't work. When there were only a couple of thousand rows of each row-type, everything seemed to work fine. But now we have almost 200 000 rows of one of the row-types - and asearch for that type takes several seconds.
I thought the Access driver would optimize my query. And only read one record. The index contains the NumberField (within every type), so the first row found would be the one to return. But it seems like all 200 000 records are retrieved, and THEN the first row only is returned.
The row source for the combo box is
SELECT [Match].[MatchID], [Match].[Home], [Match].[Away] FROM [Match];
, with the fields Home and Away being lookup fields themselves, with rowsources
SELECT [Team].[TeamID], [Team].[TeamName] FROM Team;
So the search combo box displays MatchID, Home and Away fine, but it shows the TeamID column of Home and Away, and I would like it to show the TeamName column. Is there a way to use the column function (I.e. Column(#)) in the row source?
By way of example, I want the listbox to default to the 8/6/2011 row (note that the PK is in column 0 which is hidden, so the dates are in column 5):
I have been able to accomplish this in the interim by iterating the bound column (which is the primary key), and then doing a DLOOKUP() on the table. This seems rather a long way to go tofind the values that are right there in the listbox!
Surely there's a way to scan the column values?