SQL COALESCE Function: Handling NULL Values Effectively

The COALESCE function checks the value of each column in the order in which they are listed and returns the first nonmissing value If only one

The COALESCE expression allows for user-specified NULL-handling It is often used to fill in missing values in dirty data

coalesce COALESCE Function Function returns the first non-missing value found in an array of columns The order of the columns listed in the function determines the

coalesce Examples · COALESCE with four integer columns as