You don't need to know too much about math or expression building to create a useful calculated field.
In fact, you can write robust expressions using only grade-school math.
One column lets us know the number sold of each sales unit.
Another lets us know the actual numerical value of each of these units.
When you create a calculated field, you are adding a new field in which every row contains a calculation involving other numerical fields in that row.
To do this, you must enter a mathematical expression, which is made up of field names in your table and mathematical symbols.
Once you have created your Select Query and specified the criteria you want to use to delete records, you can test out your query by running it.Once you choose the table, you can match the fields between the source table and destination table using the "Append To:" row highlighted in the screenshot below.Notice that the names of the fields are different between the two tables, which is why Access needs you to tell it how to map the fields to each other.For example, if you have imported records from an Excel file into a temporary staging table, you can then add them to your actual "live" tables using an Append Query.First, create your Select Query with any necessary filter criteria. You will be prompted to indicate what table you want to add records to.It explains how to establish relationships in Access and how to build referential integrity.