--sql查出每天的总数
select date,sum(code)from serverinfo where date between'2012-06-13'and'2012-06-14'group by date;
注 : date 为表的字段名
查询一周内: select * from table_name where week(column_name) = week(now()) ; 查询一天: select * from table_name where to_days(column_name ) = to_days(now()); select * from table_name where date(column_name ) = curdate(); 查询一周: select * from table_name where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(column_name ); 查询一个月: select * from table_name where DATE_SUB(CURDATE(), INTERVAL 1 MONTH) <= date(column_name ); 查2013-01-29前7天的数据: select * from tablename where date(dt) >= DATE_ADD('2013-01-29',INTERVAL - 6 DAY) ; 统计前一天的日志sql语句: select * from bean where date(usedate) = date_sub(curdate(),interval 1 day);
--设置mysql的编码问题
set names utf8;
mysql导入备份数据:
C:\Documents and Settings\Administrator>mysql -uroot -p lion< E:\calDemo\ojbizsd
b_fact_baptize.dump121009
mysql在linux下备份
mysqldump -uojtiger -pxsw2#EDC -h 192.168.100.30 --single-transaction --add-drop-table --default-character-set=utf8 ojbiwjsdb fact_rst_shop_stat >ojbiwjsdb_fact_rst_shop_stat_dump.2012-10-25
ojtiger用户名
xsw2#EDC 密码
ojbiwjsdb 数据库名
linux下通过ftp下载:get 文件名 , 默认下载到本地我的文档
导出sql数据在sql语句后面加上如下语句:
into outfile '/var/tmp/guoqing_phone.csv' fields terminated by ',' lines terminated by '\n';