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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).
Secondly, if the source table is a linked table, we can resort to a two-step process.
I came across this error when I was trying to update data in a local Access table by using the matching data in a linked table in Oracle.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.Customer Sales_Retail is a local table (target table - contains the data I wanted to update). Sales Date Query 3: Here is another way of doing the same thing as Query 2, but here in the sub-query it uses IN rather than INNER JOIN. Sales Date To fix the problem, I had to split my original update query into two queries.Source table: Customer Sales (this is a linked table in Access) Target table: Customer Sales_Retail (this is an Access local table) What we want to do is to change Sales Date value in the Customer Sales_Retail table to new sales date stored in the linked table. It's less efficient than using inner join because join can take advantage of the index on the join column if it exists. The first one is a make-table query and the other one is a cross-table update query.
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