9  Table Structure and Freshness

9.1 Schema validation

9.1.1 Checking that columns exist

9.1.2 Matching names and types

9.1.3 Tightening or relaxing the match

9.2 Dimensional validation

9.2.1 Row counts

9.2.2 Column counts

9.3 Data freshness

9.4 Table comparison

9.5 Structure first

9.6 Beyond structure

9.7 Summary