select name,count(请假次数) as 请假次数 from table group by name
select name,sum(请假次数)as 请假次数 from '表名' group by name
select name,sum(请假次数) as 请假次数 from table group by name
select name,sum(请假次数)as 请假次数 from '表名' group by Name
简单，SLECT * FROM 表名 WHELE name="李" and name ="赵" 如果考虑另建个表则复杂些
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