BigQuery - 过滤而不丢失“空”值

Question

我尝试过滤数据库，但不幸的是我丢失了“null”值：

样本看起来像

Name | City | Sold
Nike | NYC  | 15
null | SFO  | 20
Mega | SEA  | 10
null | null | 8
nike | CHI  | 12

我尝试在没有 Nike 的情况下以任何方式查找数据，但是当我去的时候

Select ...
where not lower(Name) contains "nike"

但后来我发现只有

超级 |东南亚 | 10

null Name 值的所有行也都消失了。 我怎样才能防止他们被删除？ 谢谢

Answer 1

看这个：

select * from 
(select string(NULL) as name,'SFO' as city, 20 as sold),
(select 'Nike' as name,'NYC' as city, 15 as sold),
where not lower(name) contains 'nike2' or name is null

返回

+-----+------+------+------+---+
| Row | name | city | sold |   |
+-----+------+------+------+---+
|   1 | null | SFO  |   20 |   |
|   2 | Nike | NYC  |   15 |   |
+-----+------+------+------+---+