how i can verifiy the null occupied the memory...
how i can verifiy the null occupied the memory...
NULL is absence of value. How can a non existent value occupy space in memory?
Code:SQL> CREATE TABLE TEST_DATA( X NUMBER); Table created. SQL> INSERT INTO TEST_DATA VALUES(NULL); 1 row created. SQL> SELECT DUMP(X) FROM TEST_DATA; DUMP(X) -------------------------------------------- NULL