What is IMEX within OLEDB connection strings?

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From ConnectionStrings

“If you want to read the column headers into the result set (using HDR=NO even though there is a header) and the column data is numeric, use IMEX=1 to avoid crash.

To always use IMEX=1 is a safer way to retrieve data for mixed data columns. ..”

Please note that the IMEX value can be very important when you need to write back data to the Excel.
A fast search on Internet on IMEX found numerous articles about problems with various IMEX values

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