Append Query- Only Add Records That Don't Exist
The assignments are placed in one table (which also contain a foreign key to the class they belong). Students are assigned to particular classes thru a linked table and are given a RosterID
The append query places the assignments in a Grade table using the assignmentID and RosterID
I would like the append query to place only assignments that have been added since the append query was last run- and to ignore assignments that are already there
In design view, I tried (in the append fields) to set the criteria as <>[tblGrades].[RosterID] and <> [tblGrades].[AssignmentID], but it obviously thinks its a parameter query.
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What's wrong... Please write below.
Does the append query just pull available records and then only add the missing records? Or when the append query says it is going to add 201357 records it is going to add that many records? I don't have a primary key designated if that helps.
Microsoft Access append queries are good for adding data to a different table where the data is based upon a selection criteria. However, append queries are not always the most efficient way of adding records to another database. If you need to add all records and fields from one table to another table, the append query is not the best way to do it. Using Copy and Paste options in this case would be the best solution.
INSERT INTO tbl_Clients ( ClientName )
SELECT [Tmp_Imp].[Client Name]
GROUP BY [Tmp_Imp].[Client Name];
But now I need to add a twist, I need to only append those Clients that do not already exist in the table already. How would I go about this?
I usually use an append querry, and set the primary key to to the field that will strip the duplicates.
However my concern is that many of my exisitng records have many notes. When I do an append query, how do I know which dups will be deleted, obviously I dont want to delete the existing records, that contain notes
I've ran an Append Query to select certain fields from the old DB to add it into the preformatted table in the new DB. This preformatted table is based on the table from the old DB but it has slightly different fields.
The Append Query seemed successfull so far. So now my new DB's table data mirrors the old one.
However, the old DB is still live at the moment but is due to be taken down soon so I will need to run a query to constantly update the data in the new DB in the mean time.
Let's say during this time the user adds a few new records in the old DB and modify some information on the older records in the old DB. What query should I run to correctly mirror this on my new DB's table?
As I understand it Append Query will only add new records so it won't go through the old records?
Should I just wait until the last minute, clear all data in my new table and run the Append Query once
However, I now need to create another table that could allow for duplicate CAN additions depending on the lifecycle of this hardware and therefore need to add a 2nd criteria to stop duplicate uploads.
Therefore, is it possible to have 2 criteria that if both are met, do not append the record, but if only 1 is met, will append the record?
The other field I'm using will be the date the account was flashed. So, what I need to have is where CAN + Date are matched, ignore record, if CAN or Date are matched, add record and ofcourse if neither exist, add record.
Is it as simple as adding in a 2nd field using Is Null for date as well or would this not work?
I will be opening the append query sometime in the form frmIssueNew. I only need to Append the records that have a JobID of 22, and haven't already been appended.
I want the query to execute and add the records it can regardless and I don't want the user responding to message boxes
If you need to change data in an existing set of records, such as updating the value of a field, you can use an update query. If you need to make a new table from a selection of data, or to merge two tables into one new table, you can use a make-table query.