如何在sql（oracle）中不是null和not in语句？

Question

I am trying to say the statement

where date_end not in (null, 229)

I have already tried

where date_end not in (229) and date_end is not null

I have also tried

where date_end is not null or date_end not (229)

This is necessary because I am using the date_end in a to_date statement to create a date. I want to ignore 229 because of leap years and nulls because it will not respond in the to_date statement.

Answer 1

你可以试试：

where NVL(date_end, 229) != 229

Answer 2

You can simply write:

where date_end <> 229

This also filters out NULL values.

The same is true for not in :

where date_end not in (229)

If you want to be explicit, use and :

where date_end <> 229 and date_end is not null

Answer 3

如果有其他非空值而不是229，这将是一个更好的选择。

(    where date_end is  null and  date_end  not in (229));

Answer 4

Just do:

where date_end not in ( 229 )

NULL NOT IN ( 229 ) always evaluates to NULL, which is equivalent to FALSE in WHERE clause. Additional NOT NULL checking is needless.
Please examine a simple demo: http://www.sqlfiddle.com/#!4/358b6e/2

CREATE table test(
  date_end int
);

INSERT ALL
INTO test VALUES( null )
INTO test VALUES( 229 )
INTO test VALUES( 123 )
SELECT null FROM dual;

---

SELECT * FROM test;

| DATE_END |
|----------|
|   (null) |
|      229 |
|      123 |

---

SELECT * FROM test
WHERE date_end NOT IN ( 229 )

| DATE_END |
|----------|
|      123 |

Answer 5

这对我有用，看看它是否适合你：

where date_end <>229 and date_end  is not null;