从网上找到的方法,不过很不错,记录下来,也算是分享下~~ 有一个表,city,有列:cityID,cityName;将此表中所有数据,变为insert语句 select 'insert into tableName (cityID,cityName) values ('''+cityID+''','''+cityName+''')' as sqlStr from city; 这样就可以了; 如果在列中有其他类型,这样写会报错,可以用这个方法转换一下,STR(cityID,LEN(cityID))
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 peoplewhere peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1) 2.删除表中多余的重复记录,重复记录是根据单个字段(peopleId)来判断,只留有rowid最小的记录delete from people where peopleId i
方案有很多种,我这里简单说一下: 1. into outfile SELECT * FROM mytable INTO OUTFILE '/tmp/mytable.csv' FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n'; 在我使用过程中发现一个特别严重问题,这里面不能插入查询条件,比如where这些,也就是说只能整表导出,不知道是不是我的写法有问题,有知道朋友请给我留言. 第二个问题是,