|execute|create table test_1(ky int,i int, d date, s varchar(100))|

|insert|test_1|
|ky|i|d|s|
|1|1|2007-10-10|tst|
|2|null|2007-10-10|tst|
|3|1|null|tst|
|4|1|2007-10-10|null|

|query|select * from test_1|
|ky|i?|d?|s?|
|1|1|2007-10-10|tst|
|2|null|2007-10-10|tst|
|3|1|null|tst|
|4|1|2007-10-10|null|

|execute|drop  table test_1|
