boolean_expression THEN 12 RETURN false_number; 13 ELSE 14 RETURN NULL; 15 END IF; 16 END; 17 18 BEGIN 19 DBMS_OUTPUT.PUT_LINE(iifn(2 > 1,1,0)); 20 DBMS_OUTPUT.PUT_LINE(iifn(2 > 3,1,0)); 21 22 temp := iifn(null,1,0); 23 IF temp IS NULL THEN 24 DBMS_OUTPUT.PUT...
WHEN this_is_not_acceptable THEN -- handle your custom error dbms_output.put_line('[WARN]'||w_err||'Please don''t make fun of the delivery manager.'); When others then dbms_output.put_line('[ERR]'||w_err||'unhandled exception:'||sqlerrm); raise; END Get_sche...
It means, roughly, "based on tables".A DBMS has to be persistent, that is it should be accessible when the program created the data ceasesto exist or even the application that created the data restarted. A DBMS also has to provide someuniform methods independent of a specific application ...
Just to stress it out once more: A declaration is not like a global variable scoped with a biggest scope when done in the main.prg. Declarations are only precompiler directives and used within one method compiled besides the class include file exception. There is one more larger scoped aspect...