COALESCE vs ISNULL T-SQL Functions

Quick Glance on DB2 COALESCE coalesce db2 The COALESCE function returns the first non-null expression in a list of expressions The schema is SYSIBM The arguments are evaluated in the order in coalesce db2 The DB2 COALESCE function takes a comma separated list of arguments and returns the value of the first non-NULL expression found

coalesce معنى 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