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In Microsoft Access, if you are running a query and the output contains duplicate unique values, you can use a DISTINCT clause or a GROUP BY clause to remove the duplicates from the query results.
To use the DISTINCT clause, you would add the keyword "DISTINCT" immediately after the SELECT keyword in your query. For example:
SELECT DISTINCT column1, column2, column3
FROM tableName
This will return only the unique values for column1, column2, and column3 in the query results.
Alternatively, you can use the GROUP BY clause to group the duplicate values together and then aggregate them. The basic syntax for the GROUP BY clause is:
SELECT column1, column2, aggregate function(column3)
FROM tableName
GROUP BY column1, column2
This will group the duplicate values for column1 and column2 together and apply an aggregate function (such as SUM, COUNT, AVG, etc.) to column3.
It's worth noting that the DISTINCT clause can be used in combination with GROUP BY and aggregate function, to get the unique values of a column, after applying an aggregate function on it.
SELECT DISTINCT column1, aggregate function
(column2)
FROM tableName
GROUP BY column1
I hope this helps you resolve the issue with duplicate unique values in your query output.
Last edited by johnsonmillie53; 01-24-2023 at 01:03 AM.
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