mysql 使用CONCAT函数、group_concat函数,查询的结果为bolob类型解决办法

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SELECTuserName,CONCAT(sum(CASEWHEN DATE_FORMAT(createTime, '%Y-%m-%d') BETWEEN '2017-07-31'AND '2017-08-30' THENassignELSE0END,'/',sum(CASEWHEN DATE_FORMAT(createTime, '%Y-%m-%d') BETWEEN '2017-07-31'AND '2017-08-30' THENbeassignELSE0END))  AS shierfrom t_task
//利用CONVERT 函数 转为 utf8 格式
select CONVERT(column using utf8)from table
SELECTuserName,CONVERT(CONCAT(sum(CASEWHEN DATE_FORMAT(createTime, '%Y-%m-%d') BETWEEN '2017-07-31'AND '2017-08-30' THENassignELSE0END,'/',sum(CASEWHEN DATE_FORMAT(createTime, '%Y-%m-%d') BETWEEN '2017-07-31'AND '2017-08-30' THENbeassignELSE0END)) USING utf8)  AS shierfrom t_task