varchar(limit) 是如何工作的？
How does the varchar(limit) work?
我一直在使用 MySQL 并且非常模糊地理解 VARCHAR(This Number Here) 部分。该数字是该列可以存储的字符总数吗？
例如，假设我有一个 VARCHAR(400) latin1_general_ci，400 是指字符串的 400 字节限制，还是字符串可以有 400 个字符？我可以在该列变量中存储多大的字符串？
这是字段的最大字符串长度（参见 here）（不是字节）：
The CHAR and VARCHAR types are declared with a length that indicates the maximum number of characters you want to store. For example, CHAR(30) can hold up to 30 characters.
无论编码如何，这都将允许 30 个字符。
Values in VARCHAR columns are variable-length strings. The length can be specified as a value from 0 to 65,535. The effective maximum length of a VARCHAR is subject to the maximum row size (65,535 bytes, which is shared among all columns) and the character set used.
In contrast to CHAR, VARCHAR values are stored as a 1-byte or 2-byte length prefix plus data. The length prefix indicates the number of bytes in the value. A column uses one length byte if values require no more than 255 bytes, two length bytes if values may require more than 255 bytes.
我一直在使用 MySQL 并且非常模糊地理解 VARCHAR(This Number Here) 部分。该数字是该列可以存储的字符总数吗？
例如，假设我有一个 VARCHAR(400) latin1_general_ci，400 是指字符串的 400 字节限制，还是字符串可以有 400 个字符？我可以在该列变量中存储多大的字符串？
这是字段的最大字符串长度（参见 here）（不是字节）：
The
CHARandVARCHARtypes are declared with a length that indicates the maximum number of characters you want to store. For example,CHAR(30)can hold up to 30 characters.
无论编码如何，这都将允许 30 个字符。
Values in
VARCHARcolumns are variable-length strings. The length can be specified as a value from 0 to 65,535. The effective maximum length of aVARCHARis subject to the maximum row size (65,535 bytes, which is shared among all columns) and the character set used.In contrast to
CHAR,VARCHARvalues are stored as a 1-byte or 2-byte length prefix plus data. The length prefix indicates the number of bytes in the value. A column uses one length byte if values require no more than 255 bytes, two length bytes if values may require more than 255 bytes.