SQL Int(N) 的大小是多少?

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时间:2020-09-01 08:13:48  来源:igfitidea点击:

Whats the size of an SQL Int(N)?

sqlintegersizeint

提问by Michael

Simple question. I have tried searching on Google and after about 6 searches, I figured it would be faster here.

简单的问题。我试过在谷歌上搜索,经过大约 6 次搜索,我认为这里会更快。

How big is an int in SQL?

SQL 中的 int 有多大?

-- table creation statement.
intcolumn INT(N) NOT NULL,
-- more table creation statement.

How big is that INT(N)element? What's its range? Is it 2^N or is it N Bytes long? (2 ^ 8N)? Or even something else I have no idea about?

这个INT(N)元素有多大?它的范围是多少?它是 2^N 还是 N 字节长?(2^8N)?或者甚至是我不知道的其他事情?

采纳答案by Matthew Flaschen

It depends on the database. MySQL has an extensionwhere INT(N) means an INT with a display widthof 4 decimal digits. This information is maintained in the metadata.

这取决于数据库。MySQL 有一个扩展,其中 INT(N) 表示显示宽度为 4 位十进制数字的 INT 。该信息保存在元数据中。

The INT itself is still 4 bytes, and values 10000 and greater can be stored (and probably displayed, but this depends how the application uses the result set).

INT 本身仍然是 4 个字节,并且可以存储 10000 和更大的值(并且可能会显示,但这取决于应用程序如何使用结果集)。