09
Jul
When importing data into BigQuery, a crucial step is defining the table's structure - its schema. This schema can be auto-detected or defined manually. Auto-Detection with BigQuery’s LoadJobConfig Method (for Smaller Datasets) When we load data from a CSV file, we use the LoadJobConfig method with the autodetect parameter set to True. This tells BigQuery's data importer (bq load) to peek at the first 500 records of your data to guess its schema. This works well for smaller datasets, especially if the data originates from a well-defined source like a pre-existing database. Manual Definition: Tedious for Large & Evolving Data…