weixin_39909633
weixin_39909633
2017-10-17 09:22
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求大神！！！同时查出 多个字段的重复次数的 sql语句怎么写

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6条回答 默认 最新

  • pcwblover008
    TheTimeIsPassing 2017-10-17 13:49
    已采纳

    select uid,
    sum(case when typename='迟到' then 1 else 0 end) as '迟到',
    sum(case when typename='早退' then 1 else 0 end) as '早退',
    sum(case when typename='旷工' then 1 else 0 end) as '旷工'
    from t_mutivalue
    group by uid

    mysql亲测

    执行结果

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  • qq_20803639
    上帝是笨蛋i 2017-10-17 09:43

    MySQL集合，里面好像有的，忘记是哪个了，那就查查MySQL手册

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  • a314066646
    FEN_TA 2017-10-17 09:46

    select id,count(case when typename='迟到' then 1 end) as "迟到",count(case when typename='早退' then 1 end) as '早退',count(case when typename= '旷工'' then 1 end ) as '旷工' from table group by id

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  • Kuroro_Lucifer
    Kuroro_Lucifer 2017-10-17 09:49

    select count(*) where typename = #{XXX}；

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  • yy339452689

    select * from (select count(*),typename from tablename group by typename) a

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  • yisuylm
    日月路明 2017-10-17 13:09

    select UID，
    迟到=sum(case when typename='迟到' then 1 else 0 end),
    早退=sum(case when typename='早退' then 1 else 0 end),
    旷工=sum(case when typename='旷工' then 1 else 0 end)
    from table
    group by uid

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