您要查找的是不是:
- Primary_table_id The table number of the primary table. primary_table_id主表的表号。
- The first table that you select is the primary table. 您选择的第一个表为主表。
- Role The name of the relationship between the foreign table and the primary table. role外表和主表之间的关系名称。
- Rule 3: You can't change a primary key value in the primary table if that record has related records. 规则3:如果某个记录具有相关记录,则不能在主表中更改它的主键值。
- The common field from the primary table must be a primary key or have a unique index. 来自于主表的公共字段必须为主键或具有唯一索引。
- Changing values in a primary table that causes orphaned rows in a related table. 在主表中更改值(可导致相关表中出现孤立行)。
- For foreign key indexes, it also ensures that the corresponding row exists in the primary table. 对于外键索引,还要确保主表中存在相应的行。
- Adding or changing rows to a related table if there is no associated row in the primary table. 在主表中没有关联行的情况下在相关表中添加或更改行。
- You can also establish a foreign key in a secondary table to link with a primary key in a primary table. 您还可以在次表中建立外键,以链接主表中的主键。
- Unless otherwise specified, the role name will be the same as the name of the primary table. 除非另外指定,role名称将与主表的名称相同。
- The matching field from the primary table must either be a primary key or have a unique index. 来自于主表的匹配字段必须为主键或具有唯一索引。
- You also need the names of the fields in the child tables that have relationships to the fields in the primary table. 您还需要子表中与主表中的域具有关系的域的名称。
- By storing the data in two separate tables, the primary table can be simple in design and still handle the occasional need for storing this information. 通过将数据存储在两个不同的表中,主表的设计会非常简单,而且仍能够满足存储此信息的临时需要。
- The disease is still in its primary stage. 这疾病仍然在初发阶段。
- The little boy left primary school at eleven. 这个小男孩十一岁时小学毕业。
- Sure. We are friends since primary school. 当然,我们从小学就是朋友了。
- I started primary school when I was 5 years old. 我五岁时开始读小学。
- A primary cause of Tom's failure is his laziness. 懒惰是汤姆失败的主要原因之一。
- Primary school teachers use a lot of visual aids. 小学教师使用大量的视觉教具。
- Love and hatred are primary emotions. 爱和恨是基本的情感。