- Legacy SQL SELECT statement syntax and options: https://cloud.google.com/bigquery/docs/reference/legacy-sql#select-syntax
- Legacy SQL aggregate functions reference: https://cloud.google.com/bigquery/docs/reference/legacy-sql#aggfunctions
- Standard SQL SELECT statement syntax and options: https://cloud.google.com/bigquery/docs/reference/standard-sql/query-syntax
- Standard SQL JOINS: https://cloud.google.com/bigquery/docs/reference/standard-sql/query-syntax#join-types
- Standard SQL DML statements: https://cloud.google.com/bigquery/docs/reference/standard-sql/dml-syntax
- Standard SQL functions and operators: https://cloud.google.com/bigquery/docs/reference/standard-sql/functions-and-operators