http://www.linuxask.com/questions/drop-a-database-in-mongodb Drop a database in MongoDB Answer: Assuming you are going to drop the `test` database in MongoDB, follow the steps below to drop (delete) it. > use test switched to db test > db.dropDataba…

Hive Data Definition Language Hive Data Definition Language Overview Create/Drop/Alter Database Create/Drop/Truncate Table Alter Table/Partition/Column Create/Drop/Alter View Create/Drop/Alter Index Create/Drop Function Create/Drop/Grant/Revoke Roles…

删除订阅数据库的时候出现下面的错误: Cannot drop the database ‘XXX’  because it is being used for replication. 数据库的状态为Recovery Pending,试了几个办法都解决不了.最后用下面的办法解决: 将数据库Offline然后再删除就可以了.…

/*Use this sql to drop all objects in a database.*/ -- Drop all SPdeclare @dropSp varchar(max)=''select @dropSp=@dropSp+'DROP PROCEDURE '+QUOTENAME(SCHEMA_NAME(obj.schema_id))+'.'+ QUOTENAME(RTRIM(s.name)) +';'+CHAR(13)FROM sysobjects sleft join sys.…

MongoDB是一个基于分布式文件存储的数据库.旨在为WEB应用提供可扩展的高性能数据存储解决方案.…

Drop all tables in MySQL database Answer: MySQL does not have a command for removing all database table(s) without dropping the database, to do so, you need the following tricks: # mysqldump -u[USERNAME] -p[PASSWORD] --add-drop-table --no-data [DATAB…

DELETE DATABASE and DELETE USER statements delete all data tables, views, and macros from a database or user. The database or user remains in the Teradata Database as a named object and retains the available space. None of that space is any longer in…

mongoDB basic from:http://www.tutorialspoint.com/mongodb prject:https://github.com/chenxing12/l4mongodb overview getting-start collection dataType insert find Overview MongoDB is a cross-platform, document oriented database that provides, high perfor…

mongodb由C++写就,其名字来自humongous这个单词的中间部分,从名字可见其野心所在就是海量数据的处理.关于它的一个最简洁描述为:scalable, high-performance, open source, schema-free, document-oriented database.MongoDB的主要目标是在键/值存储方式(提供了高性能和高度伸缩性)以及传统的RDBMS系统(丰富的功能)架起一座桥梁,集两者的优势于一身. 安装及使用: 首先在Ubuntu上安装MongoDB…

原文地址:http://www.javacodegeeks.com/2015/07/mysql-vs-mongodb.html 1. Introduction It would be fair to say that as IT professionals we are living in the golden age of data management era. As our software systems become more complex and more distributed,…