Querying and query answering example on DB2 RDF CEDAR

I'm using a DB2 UDB Query Optimizer and it is using COLASCE function while optimizing a query in almost all the queries optimization it is

COALESCE is a function that allows you to substitute any numeric or character value for a null, based on the column data type Suppose in DEPT

coalesce bigquery COALESCE with FULL OUTER JOINs At times, you might need the COALESCE function to avoid nulls in the result columns of OUTER JOIN statements To understand

coalesce synonyms COALESCE returns the first NOT-NULL value from the list, and is only useful if the database column allows NULL values Empty is ambiguous, do