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,
set verify off; set colsep ‘分隔符’; set echo off; set feedback off; set heading off; set pagesize 0; set linesize 10000; set numwidth 26; set termout off; set trimout on; set trimspool on; spool ‘/etl/a.txt’ select trim(字段)||’分割符’|| trim(字段)||’分割符’|| t
var params = $("#myform").serializeArray(); var values = {}; for (var item in params) { values[params[item].name] = params[item].value; } alert(JSON.stringify(values));