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      1. 主键的 Sql 数据类型 - SQL Server?

        Sql Data Type for Primary Key - SQL Server?(主键的 Sql 数据类型 - SQL Server?)

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                  本文介绍了主键的 Sql 数据类型 - SQL Server?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我们应该为基于数字的主键使用哪种 sql 数据类型:

                  Which sql data type should we use for number bases primary key:

                  1. 内部
                  2. bigint
                  3. 数字
                  4. 浮动

                  推荐答案

                  一般来说,int.

                  bigint 如果您认为行数将超过宇宙中的原子数.

                  bigint if you think you'll have more rows than there are atoms in the universe.

                  uniqueidentifier 如果您需要全局唯一键(保证在架构中的所有表中唯一的键,甚至可能是普遍唯一的(我不记住))

                  uniqueidentifier is useful if you need globally unique keys (keys that are guaranteed to be unique across all tables in your schema, maybe even universally unique (I don't remember))

                  另外两个我不会使用它们不是整数类型(它们有分数,作为键没有多大意义)

                  The other two I wouldn't use they're not integral types (they have fractions, which just don't make a lot of sense as keys)

                  这篇关于主键的 Sql 数据类型 - SQL Server?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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