一、查询:
truncate alerts; #清空表数据
select count(*) from win_cdr_trunk_201807_oneself where time_start<'2018-08-01 00:00:00'; #计算2018-08-01 00:00:00之前数据总数
select count(*) from win_cdr201806 where start_year='2018' and start_month='06'; #计算2018-06月份数据总数
备份数据库
mysqldump --set-gtid-purged=off -u root -pHaixue.*X_864.o8 -h 192.168.22.204 ccod win_agmonitor > win_agmonitor.sql
mysqldump --set-gtid-purged=off -u root -pHaixue.*X_864.o8 -h 192.168.22.204 ccod rep_tmp_time > rep_tmp_time.sql
mysql -u root -pHaixue.*X_864.o8 ccod < win_agmonitor.sql
mysql -u root -pHaixue.*X_864.o8 ccod < rep_tmp_time.sql
mysqldump --set-gtid-purged=off -u root -pHaixue.*X_864.o8 -h 192.168.22.204 ccod win_agmonitor > win_agmonitor.sql
查询所有存储过程,并生成删除语句
select concat('drop procedure if exists ',b.SPECIFIC_NAME,';')as yuju from (select SPECIFIC_NAME from information_schema.routines where routine_schema in ('0802test','0903beifen') and ROUTINE_TYPE = 'PROCEDURE') b;
1.查看所有数据库容量大小
selecttable_schema as '数据库',sum(table_rows) as '记录数',sum(truncate(data_length/1024/1024, 2)) as '数据容量(MB)',sum(truncate(index_length/1024/1024, 2)) as '索引容量(MB)'from information_schema.tablesgroup by table_schemaorder by sum(data_length) desc, sum(index_length) desc;2.查看所有数据库各表容量大小
selecttable_schema as '数据库',table_name as '表名',table_rows as '记录数',truncate(data_length/1024/1024, 2) as '数据容量(MB)',truncate(index_length/1024/1024, 2) as '索引容量(MB)'from information_schema.tablesorder by data_length desc, index_length desc;
3.查看指定数据库容量大小
例:查看mysql库容量大小
selecttable_schema as '数据库',sum(table_rows) as '记录数',sum(truncate(data_length/1024/1024, 2)) as '数据容量(MB)',sum(truncate(index_length/1024/1024, 2)) as '索引容量(MB)'from information_schema.tableswhere table_schema='mysql';
4.查看指定数据库各表容量大小
例:查看mysql库各表容量大小
selecttable_schema as '数据库',table_name as '表名',table_rows as '记录数',truncate(data_length/1024/1024, 2) as '数据容量(MB)',truncate(index_length/1024/1024, 2) as '索引容量(MB)'from information_schema.tableswhere table_schema='mysql'order by data_length desc, index_length desc;