I tried the 0.0;-0.0;"" in the format of the field I want to correct. Right now the datatype is in text due to import issues. When I change it to datatype number and put 0.0;-0.0;"" in the format it makes everything in the column a zero.
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create new table from your using query.
in that field (for example its name is xxx) write:
xxxN:val(xxx)
then format again in the new table