Infers a table type from a {0} by computing the union of the fields names of the records and creating a set of columns from ...

Infers a table type from a {0} by computing the union of the fields names of the records and creating a set of columns from those names. The type of the column is derived by computing the union of the types of the values in the corresponding field of each record. If the record does not contain a field, "null" is used for the computation.
    Optionally, the number of records to examine may be specified using {1}. By default, all records of the list are examined.