• Recreate the primary key.

    重新创建

    youdao

  • So what is a primary key?

    那么什么

    youdao

  • An Entity class needs a primary key.

    Entity需要一个

    youdao

  • Customer ID column (as primary key).

    客户id(为主键)。

    youdao

  • Make sure each table has a primary key.

    确保每个都有一个

    youdao

  • The primary key identifying the catalog

    标识Catalog

    youdao

  • The target table must have a primary key.

    目标必须一个

    youdao

  • The Time table has primary key date_time.

    Time键是 date_time。

    youdao

  • Leave the primary key empty and click Next.

    留下点击Next

    youdao

  • This happens when no primary key is defined.

    即使没有定义这种操作也会发生

    youdao

  • The Customer table has primary key cust_num.

    customer的主键是cust_num。

    youdao

  • The location table has primary key location_id.

    location的主键是location_id。

    youdao

  • This becomes the primary key in the physical model.

    成为物理模型中的

    youdao

  • Primary key, referential integrity, and check constraints.

    引用完整性检查约束

    youdao

  • The first column (ID) is the primary key of the table.

    第一(ID)

    youdao

  • Automatic primary key and unknown primary key generation.

    自动生成未知的主键。

    youdao

  • Returns one particular book identified by its primary key.

    返回本特定的、(primary key)标识书籍

    youdao

  • In this case, there is no primary key available in the EPR.

    这个范例中EPR没有可用

    youdao

  • This surrogate column can be designated the primary key column.

    可以代理指定为主列。

    youdao

  • Each entity in the logical data model is assigned a primary key.

    逻辑数据模型中的每个实体指定了一个键。

    youdao

  • Every record in the table has a unique ID called the primary key.

    中的每个记录都有一个惟一的ID为主

    youdao

  • This is analogous to making a column in a database a primary key.

    类似数据库选择为主键。

    youdao

  • They use database-generated primary key values for the ID attribute.

    它们ID属性使用数据库生成

    youdao

  • The DAO may allow queries based on criteria other than the primary key.

    DAO允许基于键之外的标准进行查询

    youdao

  • As we mentioned above, they all have a column named ID as a primary key.

    前面我们过,它们一个叫作id,并将该列为主键。

    youdao

  • Updates the attributes of a specific book that is identified by its primary key.

    更新特定标识书籍属性

    youdao

  • To help with replication ER requires that the table have a primary key defined.

    实现更好复制ER要求定义一个

    youdao

  • You will notice that only STATE is still selected, because it is the primary key.

    将会注意到,只有STATE仍然被选中因为

    youdao

  • The second (REF_ESTATE_ID) is the column name from the other table's primary key.

    第二个( REF_ESTATE_ID)另外一个的列名。

    youdao

  • Each record saved in the datastore, also called an entity, requires a primary key.

    保存数据存储中的每一条记录实体都需要有键。

    youdao

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