How to solve the problem that the where condition in the query database has fields, but the query is empty

This is a problem encountered in the ThinkPHP framework

The reason for this is:
There is a problem when writing the where statement:

eg： select datatype from t_loop where address = 2/2/41;

框架中where('address='.$address)

This query is empty,

select datatype from t_loop where address = '2/2/41';

框架中where(['address'=>$address])

This query has a value

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