title: BigQuery - What is the difference between Wildcard and partitionned tables
body: <p>We have to make a choice between this two types of storage in google Bigquery to store timestamped records and from the official docs, we can't find out what are the differences between partitioned tables and wildcards in term of querying time. </p>
  
  <p>As I can see, one can use the column_PARTITIONTIME to query a wildcard table.. Is that mean that wildcard are also partitioned tables? </p>
  
  <p>The question here is about a look under the hood of how bigquery stores data in both table types? </p>