mysql - 字符串搜索返回 0 行

Question

查询=

SELECT * FROM options WHERE 'key' = 'exchange_rate'

表结构=

key varchar(500)    latin1_swedish_ci   
value   text    latin1_swedish_ci

表格内容

Key           | Value
exchange_rate | 25

程序

phpMyAdmin 4.0.4 Mysql

结果

0 Rows returned

你知道问题出在哪里吗？

Answer 1

尝试这个查询:

SELECT * FROM options WHERE `key` = 'exchange_rate'

而不是:

SELECT * FROM options WHERE 'key' = 'exchange_rate'