MySQL - TEXT 与 CHAR 和 VARCHAR
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MySQL - TEXT vs CHAR and VARCHAR
提问by Alix Axel
Reading this question, a doubt popped into my head:
看到这个问题,我的脑子里冒出一个疑问:
- char and varchar can store up to 255 chars
- text can store up to 65k chars
- char size in bytes is number of chars
- varchar size in bytes is number of chars used+ 1
- char 和 varchar 最多可以存储 255 个字符
- 文本最多可存储 65k 个字符
- 以字节为单位的字符大小是字符数
- 以字节为单位的 varchar 大小是使用的字符数+ 1
So how much bytes does TEXT actually occupy? ~65KB or number of chars used+ 1?
那么TEXT实际占用了多少字节呢?~65KB 或使用的字符数+ 1?
采纳答案by Pindatjuh
TEXT is a variable length datatype, with a maximum of 65,000 characters.
TEXT 是可变长度数据类型,最多 65,000 个字符。
LONGTEXT can be used for over 4 trillion characters.
LONGTEXT 可用于超过 4 万亿个字符。
To answer your question: it's a variable lenght, and it will only occupy the amount of characters you store.
回答你的问题:它是一个可变长度,它只会占用你存储的字符数。
回答by Aleksandr
TEXT occupies a number actual length of your data + 2 bytes.
TEXT 占用数据的实际长度 + 2 个字节。