Mybatis中oracle、mysql、db2、sql server的like模糊查询

<!-- oracle -->

<select id="searchUserBySearchName" parameterType="java.lang.String" resultType="com.urm.entity.User">

  select * from t_user where user_name like CONCAT('%',#{search_name},'%')

</select>

<!-- 或者 -->

  select * from t_user where user_name like '%'||#{search_name}||'%' 

<!-- mysql -->

<!-- sql server -->

  select * from t_user where user_name like '%'+#{search_name}+'%'

<!-- db2 -->

  select * from t_user where user_name like CONCAT('%',#{search_name},'%')