主键的 Sql 数据类型 - SQL Server?

2021-12-26 00:00:00 types sql-server database-design

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)

相关文章