mysql，sqlserver和oracle的模糊查询语句

项中经常涉及搜索功能，其实际就是应用了sql语句中的模糊查询，如下代码为常用的三种数据库的模糊查询语句

SELECT
*
FROM
z_user
WHERE
<if test = "name != null and name != ''" >
AND name LIKE
<if test = "dbName == 'oracle'" >
'%' || #{name}||'%'
</if>
<if test = "dbName == 'mssql'" >
'%' + #{name}+'%'
</if>
<if test = "dbName == 'mysql'" >
concat('%',#{name},'%')
</if>
</if >