SQL 语句 DDL CREATE DATABASE LINK 更新时间:2025-04-16 23:00:01 描述 该语句用于创建数据库链接(即dblink),以访问远端数据库中的对象。 当前版本的 OceanBase 数据库支持使用SELECT语句通过@dblink从远端数据源查询数据。同一个SELECT语句中支持多个数据源,包括本地数据源和远端数据源。详细信息请参见SIMPLE SEL...
There is always the need to create a new database in a SQL Server and in this article, we look at how this can be done using the SSMS GUI and also using T-SQL scripts to create a SQL Server database. Solution This tutorial will discuss how to create a database in SQL Server. The...
SQL Create Database, Table, and Index Create a Database To create a database: CREATE DATABASE database_name Create a Table To create a table in a database: CREATE TABLE table_name ( column_name1 data_type, column_name2 data_type, ... ) Example This example demonstrates how you can...
Creating a database in a test environment can be a quick and easy task and can be done using the SSMS GUI or by running a simple T-SQL statementin aSQL Server Management Studio(or SSMS) query window. The challenge is, however, when you have to think ahead and want to use the datab...
每个SQL Server 2008数据库至少包含两个文件:一个数据文件和一个日志文件。数据文件里包含的是数据库的数据和对象,例如表、视图和索引等;日志文件里包含的是用于恢复数据库所需的信息。 事实上,SQL Server 2008数据库的数据文件可以分为主要数据文件和次要数据文件两种。主要数据文件的扩展名为mdf,它包含数据库的启动...
Welcome to the first article in theLearn SQLseries. In this part, we’ll start with two essential commands in SQL: Create Database and Create Table. While both are pretty simple, they should be used first before you start working on anything with data (unless you use some template databa...
Collationspecifies the bit patterns that represent each character in a dataset. SQL Server supports storing objects having different collations in a single database. Recovery modelis a database property that controls how transactions are logged. There are three options under Recovery models: Simple, ...
Create a database by using a template Create a database without using a template Copy data from another source into an Access table Import, append, or link to data from another source Add an application part Open an existing Access database ...
在MySQL命令行客户端输入如下SQL语句即可实现: mysql>USE db_test; Database changed mysql>CREATE TABLE content ->(content_id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, ->subject VARCHAR(200), ->words VARCHAR(1000), ->username VARCHAR(50), ->face VARCHAR(50), ->email VARCHAR(50), ->createti...
对于在 SAP IQ 服务器上创建的 SAP SQL Anywhere 数据库,归类也可以是 Unicode 归类算法 (UCA)。如果已指定 UCA,则还应指定 ENCODING 子句。SAP IQ 不支持 SAP IQ 数据库的任何基于 UCA 的归类。如果在数据库的 CREATE DATABASE 语句中指定基于 UCA 的归类,则服务器将返回错误不支持 UCA 归类且数据库创建...