create database student on ( name=student_data, filename='C:\Program Files\Microsoft SQL Server\MSSQL14.MSSQLSERVER\MSSQL\DATA\student_data.mdf', size=5, filegrowth=15%, maxsize=10 ), ( name=student_data1, filename='C:\Program Files\Microsoft SQL Server\MSSQL14.MSSQLSERVER\MSSQL\DA...
以下是一个使用SqlDataReader查询数据库数据的示例代码: using System; using System.Data; using System.Data.SqlClient; class Program { static void Main() { string connectionString = "Server=localhost;Database=School;Trusted_Connection=True;"; string query = "SELECT StudentName, Phone FROM Student"...
Student] PRIMARY KEY CLUSTERED ( [PersonID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]) ON [PRIMARY] GO SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE TABLE [dbo].[Student...
reports from UNSWs information systems and the database for the academic proposal system (MAPPS), I discovered that there were some inconsistencies in parts of the data (e.g. duplicate entries in the table for UNSW buildings, or students who were mentioned in the student data, but had no e...
大家好,又见面了,我是你们的朋友全栈君。 SQL语句大全 –语 句功能 –数据操作 SELECT –从数据库表中检索数据行和列 INSERT –向数据库表添加新数据行 DELETE –从数据库表中删除数据行 UPDATE –更新数据库表中的数据 -数据定义 CREATE TABLE –创建一个数据库表 DROP TABLE –从数据库中删除表 ALTER TAB...
使用SQL语句进行的一系列操作 1、建库 最简单的创建数据库的方式: create database 数据库名 这种方式可以快速地创建数据库,唯一的缺点就是创建数据库的路径为当前SQLserver的安装目录下C:\Program Files\Microsoft SQL Server\MSSQL12.
update”单击鼠标右键再点击“属性”在“启动类型中”选择“自动”。安装好SQL server后可修改为禁用；
mysql创建三个表 创建三张表的sql语句,createdatabasestudenton(name=student_data,filename='C:\ProgramFiles\MicrosoftSQLServer\MSSQL14.MSSQLSERVER\MSSQL\DATA\student_data.mdf',size=5,filegrowth=15%,maxsize=10),(name=student_d
USEmaster;GOCREATEDATABASEAdventureWorksON(FILENAME='C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\DATA\AdventureWorks_Data.mdf'),(FILENAME='C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\DATA\AdventureWorks_Log.ldf')FORATTACH;GO ...
StudentID int, CourseID int, FOREIGN KEY (CourseID) REFERENCES Courses(CourseID) ); This establishes a relationship between Enrollments and Courses. 5. CHECK Constraint The CHECK constraint allows you to define a condition that needs to be met before data can be inserted into a table. ...