sqlite3导出为csv文件

sqlite3导出为csv文件

//进入数据库
sqlite3 xxx.db 
.headers on
.mode csv
.output xxx.csv
select * from table;  //查询语句
.output stdout

删除数据表中完全相同的字段

delete from table_name where newid not in(select max(newid) from table_name group by id);