测试数据
SELECT
*
FROM
`userinfo`;

方式一(最推荐) 
SELECT
`name` AS \’姓名\’,
INSERT ( telephone, 4, 4, \’****\’ ) AS \’手机号\’,
INSERT ( cardID, 4, 11, \’***********\’ ) AS \’身份证号\’
FROM
userinfo;

方式二
SELECT
`name` AS \’姓名\’,
REPLACE ( telephone, SUBSTR( telephone, 4, 4 ), \’****\’ ) AS \’手机号\’,
REPLACE ( cardID, SUBSTR( cardID, 4, 11 ), \’***********\’ ) AS \’身份证号\’
FROM
userinfo;

方式三
SELECT
`name` AS \’姓名\’,
CONCAT_WS( \’\’, SUBSTR( telephone, 1, 3 ), \’****\’, SUBSTR( telephone, 8, 4 ) ) AS \’手机号\’,
CONCAT_WS( \’\’, SUBSTR( cardID, 1, 3 ), \’***********\’, SUBSTR( cardID, 15, 4 ) ) AS \’身份证号\’
FROM
userinfo;

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