Db2 CASE Expressions: Adding If-Else Logic to Queries in Db2

website coalesce db2 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 معنى DB2 = AA ' : AL , FI : IE

coalesce db2 Converts a string or ROWID data type into a value of data type CLOB COALESCE For nullable columns, returns a value instead of a null (  The DB2 COALESCE function returns the value of the first non-NULL expression The COALESCE function takes a comma separated list of arguments which are  Description COALESCE accepts a comma separated list of parameters and returns the first value that is not null in that list or null if all the arguments are

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