[英]Can not create varchar column in mariadb
This code does not run:此代码不运行:
alter table States
add Key varchar(400) character set utf8 not null
The error:错误:
Error in query (1064): Syntax error near 'varchar(400) character set utf8 not null' at line 2
查询中的错误 (1064):第 2 行的“varchar(400) 字符集 utf8 not null”附近的语法错误
What is wrong in this code?这段代码有什么问题?
Key
is a reserved keyword in MySql (hence in MariaDB too), so to use it as an identifier you must enclose it in backticks. Key
是 MySql 中的保留关键字(因此在 MariaDB 中也是如此),因此要将其用作标识符,您必须将其括在反引号中。 This will do:这将做:
alter table `States` add `Key` varchar(400) character set utf8 not null
I've also enclosed States
in backticks, just for the sake of consistency, even though it's not really required.为了保持一致性,我还用反引号将 State 括
States
,即使它并不是真正需要的。
An option would be to use another name for the new column, so to avoid the same problem in queries involving it afterwards.一个选项是为新列使用另一个名称,以避免在以后涉及它的查询中出现同样的问题。
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