英语词汇null record怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

网络释义

1
[计]?空记录
... 不具有法律效力 void ... 空记录 null record 空参考 null reference ...

双语例句

1
When ON delete set NULL is active, when a record is deleted from the parent table, all records in the child table with matching foreign key values are set to NULL.
当ON DELETE SET NULL规则被激活时，如果一条记录从父表中删除，子表中的所有记录以及匹配的外键值都被设置为NULL。
2
The combined record is much easier to use-you only have to check the PICTURE field to see if it's not null (which was the result of the LEFT OUTER JOIN).
而组合的记录使用起来要容易得多—只需检查PICTURE字段，查看它是否为空(这是LEFT OUTER JOIN的结果)。
3
The SIF record format also contains delta specific columns to assist in setting the indicator values of existing database records to NULL.
SIF记录格式还包含特定于delta的列，以协助将现有数据库记录的指示符值设置为NULL。

单词	null record
释义	null record 简明释义空记录网络释义 1 [计]?空记录 ... 不具有法律效力 void ... 空记录 null record 空参考 null reference ... 双语例句 1 When ON delete set NULL is active, when a record is deleted from the parent table, all records in the child table with matching foreign key values are set to NULL. 当ON DELETE SET NULL规则被激活时，如果一条记录从父表中删除，子表中的所有记录以及匹配的外键值都被设置为NULL。 2 The combined record is much easier to use-you only have to check the PICTURE field to see if it's not null (which was the result of the LEFT OUTER JOIN). 而组合的记录使用起来要容易得多—只需检查PICTURE字段，查看它是否为空(这是LEFT OUTER JOIN的结果)。 3 The SIF record format also contains delta specific columns to assist in setting the indicator values of existing database records to NULL. SIF记录格式还包含特定于delta的列，以协助将现有数据库记录的指示符值设置为NULL。
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