Lock down your formulas with type-converters (DATE(), CONCATENATE(), etc.)

I’d like to share what I think is an excellent tip from @MultiTech_Visions that came in response to a problem I was having with column types getting changed.

The basic idea is to wrap expressions in expressions like DATE(), CONCATENATE() (for text), etc. so that the AppSheet editor can’t get confused about what kind of data the column contains:

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