虽然这个答案不太可能出现，但我认为有必要进行以下澄清:

the (n) behind an integer data type in MySQL is specifying the display width the display width does NOT limit the length of the number returned from a query the display width DOES limit the number of zeroes filled for a zero filled column so the total number matches the display width (so long as the actual number does not exceed the display width, in which case the number is shown as is) the display width is also meant as a useful tool for developers to know what length the value should be padded to

A BIT OF DETAIL the display width is, apparently, intended to provide some metadata about how many zeros to display in a zero filled number. It does NOT actually limit the length of a number returned from a query if that number goes above the display width specified. To know what length/width is actually allowed for an integer data type in MySQL see the list & link: (types: TINYINT, SMALLINT, MEDIUMINT, INT, BIGINT); So having said the above, you can expect the display width to have no affect on the results from a standard query, unless the columns are specified as ZEROFILL columns OR in the case the data is being pulled into an application & that application is collecting the display width to use for some other sort of padding.

主要参考资料:https://blogs.oracle.com/jsmyth/entry/what_does_the_11_mean

在mysql中int(11)的列的大小是多少?

(11) - int数据类型的这个属性与列的大小无关。它只是整数数据类型的显示宽度。从11.1.4.5。属性:

MySQL支持可选地指定显示的扩展 base关键字后面括号中的整数数据类型的宽度 对于类型。例如，INT(4)指定带显示的INT 四位数字的宽度。

我认为int(11)的最大值是4294967295

4294967295是答案，因为int(11)显示最多11位数字IMO

虽然这个答案不太可能出现，但我认为有必要进行以下澄清:

the (n) behind an integer data type in MySQL is specifying the display width the display width does NOT limit the length of the number returned from a query the display width DOES limit the number of zeroes filled for a zero filled column so the total number matches the display width (so long as the actual number does not exceed the display width, in which case the number is shown as is) the display width is also meant as a useful tool for developers to know what length the value should be padded to

A BIT OF DETAIL the display width is, apparently, intended to provide some metadata about how many zeros to display in a zero filled number. It does NOT actually limit the length of a number returned from a query if that number goes above the display width specified. To know what length/width is actually allowed for an integer data type in MySQL see the list & link: (types: TINYINT, SMALLINT, MEDIUMINT, INT, BIGINT); So having said the above, you can expect the display width to have no affect on the results from a standard query, unless the columns are specified as ZEROFILL columns OR in the case the data is being pulled into an application & that application is collecting the display width to use for some other sort of padding.

主要参考资料:https://blogs.oracle.com/jsmyth/entry/what_does_the_11_mean

根据这里，int(11)将占用4个字节的空间，即2^(31)= 2147483648 max值和-2147483648min值的32位空间。一位是符号。