![]() WHERE customer.postcode = supplier.postcode So, if you try to join using the condition But the postcode fields have different data types in the two tables as seen below: Imagine you are trying to join the customer and supplier tables below on Postcode. Let us look at some situations where this error can occur.Įxample 1: You are trying to join two tables on a field, but the data types of the joined fields are not the same. For example, if you give Access a text string when it is expecting a number, you receive a data type mismatch error. The “Type mismatch in expression” error indicates that Access cannot match an input value to the data type it expects for the value. In this article, we will talk about the Data Type Mismatch errors in MS Access.
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