Microsoft access updating

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The three queries below produce the same result, but none of them succeeded due to the Access error "Operation must use an updatable query". update Customer Sales_Retail as a inner join ( select Customer ID, Sales Date from Customer Sales where Customer ID in (select distinct Customer ID from Customer Sales_Retail) ) as b on a. Step #1: Make-Table query - create an intermediate (temporary but physical) local table To sum up, when we do multiple table updates in MS Access, first we need to make sure that the source table contains unique data in the joined column(s).

Query 1: This is the most common way to do multiple table update in Access. This may be a primary key column or a column with unique index, or columns with combined uniqueness (also known as composite unique index).

update Customer Sales_Retail as a inner join ( select x. Sales Date from Customer Sales as x inner join Customer Sales_Retail as y on x. Uniqueness prohibits duplicated values in the column(s).

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If the two tables are both local Access tables, my update query is fine to run and can correctly update the data in the target table, but because one of the tables (the source table in my case) was a linked table, I kept getting this error.While I think I may be able to work out a hack job solution solution, I'm hoping to identify the most simple way to regularly update a MS Access table to exactly match the contents of a linked . I want MS Access to change values in a row in the table if the values in the same row in the linked . TXT file have changed, as well as add any new rows and delete any rows that are no longer in the . I presently have an append query to add the new rows. You can think of update queries as a powerful form of the Find and Replace dialog box.You cannot use an update query to add new records to a database, or to delete records from a database.

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