MySQL 作為通配符字符串的變量

Question

硬編碼通配符關鍵字返回預期結果

select * from answer a where a.answer like "%grow%";

但是一旦我用變量替換關鍵字就停止工作

set @search = "grow";
select * from  answer a where a.answer like concat('"%', @search, '%"'); 

Answer 1

基於上述@Barmar 評論的工作代碼

set @search = "grow";
select * from  answer a where a.answer like concat('%', @search, '%');