sql varchar
时间: 2023-09-08 17:09:13 浏览: 98
在SQL中,varchar是一种可变长度字符串数据类型。它可以存储英文字符,但不能存储中文字符。varchar(n)中的n表示最大长度,由用户指定。与char不同的是,varchar只占用实际存储数据所需的空间,而不是固定长度的空间。例如,varchar(10)的最大空间为10字节,如果存储的数据少于10字节,则不会占用全部10字节的空间。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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