MYSQL,字符串链接，截取

SELECT    CONCAT(     SUBSTRING(telephone, 1, 4),     '***',     SUBSTRING(telephone, 8, 4)   ) AS 电话号码,   cfniiu_userid AS '财富牛用户ID',   LEFT(cfniu_regDate,19) AS '在财富牛注册时间',   9niu_userid AS '9牛用户ID'

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