DB2 COALESCE() - CSDN文库

DB2 SQL Training 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 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 معنى DB2 - Exemplos simples - FULL OUTER JOIN