TL;DR. TEXT. fixed max size of 65535 characters (you cannot limit the max size); takes 2 + c bytes of disk space, where c is the length of ... ... <看更多>

MySQL 4.1版本之前，varchar的最大长度是255 byte字节（也有一说是5.0.3版本之前）。查了下这个版本发布都是2004年的事情了。惯性真恐怖，我可不相信 ... ... <看更多>

Mysql 5.5 Change a column's varchar length. GitHub Gist: instantly share code, notes, ... alter table [table_name] modify [column_name] varchar(500); ... ... <看更多>

For CHAR and VARCHAR, a prefix length is optional. See Section 7.5.1, “Column Indexes”. and. BLOB and TEXT columns cannot have DEFAULT values. So, because ... ... <看更多>

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Note that the % operator is for string or varchar values. MySQL Like multiple values. The _ wildcard matches exactly one value. As with most other operators ... ... <看更多>