COALESCE vs IFNULL vs NULLIF in BigQuery

COALESCE SQL function: Why we love it coalesce bigquery COALESCE is internally translated to a CASE expression, ISNULL is an internal engine function COALESCE is an ANSI standard function, coalesce معنى Similar as other databases, BigQuery also supports a large number of SQL dialects COALESCE and IFNULL functions are provided to deal with

coalesce bigquery However, you can also manually reduce the number of partitions being written by calling coalesce on the DataFrame to mitigate this problem