alter nation

NotesLamp:linx (operating system)A (Apache)--Web applicationM (Mysql): Small size, simple applicationP (PHP)The first step: setting up the Web environment--a\m\pWAMP: Build the environment with WAMPDW: Better displayBasic operations of the

Create DATABASE nameCREATE TABLE CeShi1(Uid varchar (primary) key,PWD varchar (50),Name varchar (50),Nation varchar (50),Foreign KEY (Nation) references Nation (Code))Writing query statements requires attention:1. When creating a table, do not write

Creation of tables:1. Create column (field): Column name + type2. Set Primary key columns: uniquely identifies a single piece of data3. set Unique: content cannot be duplicated4. foreign key relationship:A table (from a table) in which a column

TPCH is a toolkit provided by the TPC (Transaction processing performance Council) organization. Used for OLAP testing to assess the performance of decision support systems (DSS) in Business Analytics. It includes a suite of business-oriented AD-HOC

Oracle notes (9) Table creation and management links: Oracle notes (1) Oracle introduction and installation tips (2) SQLPlus command http://www.bkjia.com/database/201209/154051.html#oraclenotes (3) Scott user's table structure workshop (4) simple

For a database, each table actually represents a database object, and the database object refers to all the operations defined by DDL, for example: tables, views, indexes, sequences, constraints, and so on all belong to object operations. Therefore,

In fact, for a database, each table represents a database object, and the database object refers to all the operations of the DDL definition, for example: tables, views, indexes, sequences, constraints, and so on, all belong to the object, so the

1 .. sqlplus operation 1. query all tables in a database -- "selec * From tab;2. Set pagesize 30;3. Set the number of lines displayed in each row to set linesize 300;4. Switch the user's conn user name [sys]/password [as sysdba/sys];5. view the

1. View the database character set?The database server character Set select * from Nls_database_parameters, which is derived from props$, is the character set representing the database.The client character set environment, select * from Nls_instance_

From old leaves, original http://imysql.com/2012/12/21/tpch-for-mysql-manual.html Tpch is a toolkit provided by the TPC (transaction processing performance councer) organization. Used for OLAP testing to evaluate the performance of the Decision