If not NULL, increment the line counter.

如果不是NULL，则增加行计数器。

youdao

We added the NOT NULL flag to indicate that the fields must not be null.

我们添加了 NOT NULL 标志来指示字段必须不能为空。

youdao

Constraints Supports, primary, foreign, unique, not null constraint.

约束 支持主键、外键、惟一和非空约束。

youdao

Translation, if one were to start with a pre-trial null hypothesis probability of 50% (reflecting equipoise, an ethical prerequisite for randomizing patients), the post-trial null hypothesis probability would still be 9%, which is not sufficient to change my practice.

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