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select * from V$VERSION;
| BANNER |
|---|
| Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production |
| PL/SQL Release 11.2.0.2.0 - Production |
| CORE 11.2.0.2.0 Production |
| TNS for Linux: Version 11.2.0.2.0 - Production |
| NLSRTL Version 11.2.0.2.0 - Production |
create table t(x int)
insert into t values('')
1 rows affected
insert into t values(null)
1 rows affected
select count(*),count(x)
from t
| COUNT(*) | COUNT(X) |
|---|---|
| 2 | 0 |