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  • mysql 查询重复

    2020-11-01 20:17:47
    根据单个字段查询重复 select shop_order_id,count(shop_order_id) from ec_oms_order group by shop_order_id having count(shop_order_id) > 1 根据多个字段查询重复 select shop_order_id,shop_code,...

    根据单个字段查询重复

    select shop_order_id,count(shop_order_id) from ec_oms_order group by shop_order_id having count(shop_order_id) > 1

    根据多个字段查询重复

    select shop_order_id,shop_code,count(1) from ec_oms_order group by shop_order_id,shop_code having count(1) > 1

     

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  • mysql查询重复

    2015-02-04 11:48:00
    select * from tablename where id in ( select id from tablename group by id having count(id) > 1 ) 转载于:https://www.cnblogs.com/jiayongchao/p/4271980.html

    select * from tablename where id in (   
    select id from tablename   
    group by id   
    having count(id) > 1   
    )

    转载于:https://www.cnblogs.com/jiayongchao/p/4271980.html

    展开全文
  • 表全部数据-------------------1 查询people_no重复的记录select * from peoplewhere people_no in (select people_no from people group by people_no having count(people_no) > 1);----------------------2 ...

    表全部数据

    49dc4390bb6e96c7c90fb01bb1d130b3.png

    -------------------

    1 查询people_no重复的记录

    select * from people

    where people_no in (select people_no from people group by people_no having count(people_no) > 1);

    345d1954423fb49a57a3ab45ba00933c.png

    ----------------------

    2 查询people_no重复的记录 ,排除最小id,如果删除改为delete from

    select * from people

    where people_no in (select people_no from people group by people_no having count(people_no) > 1) and

    id not in (select min(id) from people group by people_no having count(people_no)>1);

    1ba2cddd76808ca765698ba9abb42fcd.png

    -----------------------------

    3 查询people_no people_name重复的记录

    select * from people a

    where (a.people_no,a.people_name) in (select people_no,people_name from people GROUP BY people_no,people_name HAVING count(*)>1);

    3517160de4ab390e5af053921ac79fd8.png

    -----------------------------------

    4 查询people_no people_name重复的记录,排除最小id

    select * from people a

    where (a.people_no,a.people_name) in (select people_no,people_name from people GROUP BY people_no,people_name HAVING count(*)>1) and

    a.id not in (select min(id) from people GROUP BY people_no,people_name HAVING count(*)>1);

    d58f10e7442b24f1689c4bde94fdf371.png

    来源:https://www.cnblogs.com/LDDXFS/p/9867928.html

    展开全文
  • MySQL 查询重复数据

    2020-11-02 14:09:29
    MySQL 查询重复数据 学习内容: create DATABASE exercise; CREATE TABLE test ( id INT NOT NULL PRIMARY KEY, DAY date NOT NULL ); INSERT INTO test (id, DAY) VALUES (1, '2006-10-08'); INSERT INTO ...

    学习目标:

    MySQL 查询重复数据


    学习内容:

    create DATABASE exercise;

    CREATE TABLE test (
        id INT NOT NULL PRIMARY KEY,
        DAY date NOT NULL
    );

    INSERT INTO test (id, DAY)
    VALUES
        (1, '2006-10-08');

    INSERT INTO test (id, DAY)
    VALUES
        (2, '2006-10-08');

    INSERT INTO test (id, DAY)
    VALUES
        (3, '2006-10-09');

    select * from test;

    查询结果:

     

    查询数据重复的值:

    SELECT
        *
    FROM
        test
    WHERE
        `DAY` IN (
            SELECT
                `DAY`
            FROM
                test
            GROUP BY
                `DAY`
            HAVING
                COUNT(`DAY`) > 1
        );

     

     


    展开全文
  • 主要介绍了mysql 查询重复的数据的SQL优化方案,非常不错的方案推荐给大家。
  • Mysql查询重复数据 select * from 表名 where 字段名 in(select 查询字段名 表名 group by 字段名 having count(字段名) > 1); 示例: 1.查询用户列表中名称重复的数据 select * from t_users where `name...
  • 在数据开发时我们常常会需要把数据库中重复的记录查出来或直接删除数据库中重复记录,下面我来给大家总结一些方法,有需要的朋友可参考。常用的语句1、查找表中多余的重复记录,重复记录是根据单个字段(mail_id)来...
  • MYSQL查询重复记录的方法很多,下面就为您介绍几种最常用的MYSQL查询重复记录的方法,希望对您学习MYSQL查询重复记录方面能有所帮助。 1、查找表中多余的重复记录,重复记录是根据单个字段(peopleId)来判断 ...
  • select * from staticcatalogue WHERE UPPER(Source) IN (SELECT UPPER(Source) FROM staticcatalogue GROUP BY UPPER(Source) havin在mysql查询不区分大小写重复的数据,往往会用到子查询,并在子查询中使用upper...
  • 情况一,直接查出重复–查出表中有重复的id的记录,并计算相同id的数量select id,count(id) from @table group by id having(count(id)>1)其中,group by id,是按id字段分组查询:select id,count(id) from @...
  • 需要查询时候展示一条,字表的数据用逗号分隔sql语句:SELECTcdu.user_name as user_name,cmp.user_id as create_uid,cmr.receive_user_id as receive_user_id,cmp.id as id, cmp.mesage_title as mesage_title,cmr....
  • mysql查询重复记录并删除 # 查重,包含重复的全部显示(md5为判断重复的依据) select * from telRecord where md5 in (select md5 from telRecord group by md5 having count(md5) > 1) # 查重,显示需要删除的...
  • mysql中如何找出重复数据的所有行不是只找出所有指定字段重复的数据对应行id最小的,而是所有的都查出来mysql查询出一列里面重复过的数据(2个或以上)mysql 一句sql 查询出一列里面重复过的数据(2个或以上), 注意...
  • MySQL查询重复数据并删除重复数据 一、创建表,插入一批示例数据 create table student( id bigint(20) auto_increment, code int(20), name varchar(255), flag int(2), primary key(id) )engine=innodb; ...
  • mysql查询不区分大小写重复的数据,往往会用到子查询,并在子查询中使用upper函数来将条件转化为大写。如:select * from staticcatalogue WHERE UPPER(Source) IN (SELECT UPPER(Source) FROM staticcatalogue ...
  • MySQL查询表中重复数据,比如现在需要查询出表中条码重复的记录,SQL如下:SELECT GUIDE_BARCODE FROM checker_barcodeGROUP BY GUIDE_BARCODE HAVING COUNT(GUIDE_BARCODE) >1现在查询重复的数据的sql是出来了,...
  • MySQL查询重复及冗余索引sql

    千次阅读 2017-08-17 16:26:33
    MySQL查询重复及冗余索引sql
  • 查重是我们在工作中经常会遇到的一个需求,下面这篇文章主要给大家介绍了关于MySQL查询重复数据(删除重复数据保留id最小的一条为唯一数据)的相关资料,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有...
  • mysql查询重复记录的方法

    千次阅读 2014-08-14 23:22:44
    MYSQL查询重复记录的方法很多,下面就为您介绍几种最常用的MYSQL查询重复记录的方法,希望对您学习MYSQL查询重复记录方面能有所帮助。 1、查找表中多余的重复记录,重复记录是根据单个字段(peopleId)来判断 ...
  • mysql查询不区分大小写重复的数据,往往会用到子查询,并在子查询中使用upper函数来将条件转化为大写。如:代码如下:select * from staticcatalogue WHERE UPPER(Source) IN (SELECT UPPER(Source) FROM ...
  • day_loandetil,有以下字段主键ID、借贷IDLOAN_TURN_ID、账单日BILL_TIME、正常利息INTEREST、逾期利息OVERDUE_BALANCE字段表中存在同一天、同一笔借贷、两条数据,现在要把重复的数据查询出来并把正常利息+逾期利息...
  • $sql="SELECT a.id,a.title FROM dede_archives a left join dede_taglist t on t.tag=a.title WHERE t.typeid=$id and t.arcrank... 数据库中有个大表,需要查找其中的名字有重复的记录id,以便比较。 如果仅仅是查...

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