Set null sets the value to null if all foreign key columns for the table can accept null values 设置空如果表的所有外键列都可接受空值，则将该值设置为空。
The foreign key column name in the source table is the same as the name of the destination table 源表中的外键列名与目标表名相同。例如，外键列order . customer
Media family data written by a backup operation to a backup device that is being used by a media set 一种更新操作，更新由其他表的现有行中的外键列引用的主键值。
If you need to make an adjustment , then set this property to the foreign - key column in the related table 如果您需要进行调整，那么可以将此属性设置为相关表中的外键列。
The foreign key column name in the source table is the same as the destination table name concatenated with the primary key column name 源表中的外键列名为目标表名加上主键列名。
In the adjacent grid cell to the left of each column , choose the corresponding foreign - key column of the foreign - key table 在每列左侧的临近网格单元格中，选择外键表的相应外键列。
The foreign key column name in the source table is the same as the primary key column name in the destination table 源表中的外键列名与目标表中的主键列名相同。例如，外键列order . customerid
A relationship is analogous to a join path that might exist between primary and foreign key columns in a relational database 关系类似于可能存在于关系数据库中的主键列和外键列之间的联接路径。
You cannot enter a value in the foreign - key column of the related table if that value does not exist in the primary key of the related table 如果某个值在相关表的主键中不存在，则不能在该相关表的外键列中输入该值。
Set default sets the value to the default value defined for the column if all foreign key columns for the table have defaults defined for them 设置默认值如果表的所有外键列均已定义默认值，则将该值设置为列定义的默认值。
