MYSQL,字符串鏈接，截取

SELECT    CONCAT(     SUBSTRING(telephone, 1, 4),     '***',     SUBSTRING(telephone, 8, 4)   ) AS 電話號碼,   cfniiu_userid AS '財富牛用戶ID',   LEFT(cfniu_regDate,19) AS '在財富牛註冊時間',   9niu_userid AS '9牛用戶ID'

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