【筆記】數(shù)據(jù)庫(kù)實(shí)例代碼

一迹卢。數(shù)據(jù)庫(kù)基本概念：
數(shù)據(jù)、數(shù)據(jù)庫(kù)徒仓。數(shù)據(jù)模型/DBMS（數(shù)據(jù)庫(kù)管理系統(tǒng)）/DBS（數(shù)據(jù)庫(kù)系統(tǒng)）
二腐碱。數(shù)據(jù)庫(kù)內(nèi)部組成
二維表、視圖，索引
三症见，數(shù)據(jù)庫(kù)管理系統(tǒng)主要功能：
六大功能
四數(shù)據(jù)庫(kù)操作語(yǔ)言：
SQL語(yǔ)言實(shí)現(xiàn)增刪查改*一喂走。數(shù)據(jù)庫(kù)基本概念：
數(shù)據(jù)、數(shù)據(jù)庫(kù)谋作。數(shù)據(jù)模型/DBMS（數(shù)據(jù)庫(kù)管理系統(tǒng)）/DBS（數(shù)據(jù)庫(kù)系統(tǒng)）
二芋肠。數(shù)據(jù)庫(kù)內(nèi)部組成
二維表、視圖遵蚜，索引
三帖池，數(shù)據(jù)庫(kù)管理系統(tǒng)主要功能：
六大功能
四數(shù)據(jù)庫(kù)操作語(yǔ)言：
SQL語(yǔ)言實(shí)現(xiàn)增刪查改
實(shí)驗(yàn)內(nèi)容：
1.用VS2010創(chuàng)建名為
insert into T_Student(sno,sname,ssex,sage,sdept) values('','','','','')
select * from T_Student
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2001','李勇','男','20','CS')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2002','劉晨','女','18','CS')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2003','王敏','女','19','MA')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2004','張立','男','22','IS')
insert into T_Course(Cno,Cname,Ccode) values ('1','數(shù)據(jù)庫(kù)','1')
insert into T_Course(Cno,Cname,Ccode) values ('2','英語(yǔ)','4')
insert into T_SC(Cno,Sno,Grade) values ('1','2001','88')
insert into T_SC(Cno,Sno,Grade) values ('2','2002','80')
增加一條學(xué)號(hào)為2006，姓名為張揚(yáng)
insert into T_student(sno,sname,ssex) values ('','','')
(sno,sname,ssex,sage,sdept) ('','','','','')空字符串
select * from t_student where sname='李勇'
select * from t_student where ssex='女'
select sdept from t_student where sname='張立'
select count() from T_student
select max() from t_student
update t_student set ssex='女' where sno='2001'
update t_student set sage='22' where sname='王敏'
update t_student sdept='MA' where ssex='男'

insert into T_Student (sno,sname,ssex) values ('2006','張揚(yáng)','男')
delete from t_student where sno='2006'
delete from t_student where sage=22

create table t_course(
cno int primary key,
cname varchar(10),
ccode int
);
create view as(
select sno,sname,cno,cname,grade from t_student,t_sc,t_course where t_student.sno=t_sc.sno and
t_sc. cno=t_course.cno
);
一吭净。數(shù)據(jù)庫(kù)基本概念：
數(shù)據(jù)睡汹、數(shù)據(jù)庫(kù)。數(shù)據(jù)模型/DBMS（數(shù)據(jù)庫(kù)管理系統(tǒng)）/DBS（數(shù)據(jù)庫(kù)系統(tǒng)）
二攒钳。數(shù)據(jù)庫(kù)內(nèi)部組成
二維表帮孔、視圖，索引
三不撑，數(shù)據(jù)庫(kù)管理系統(tǒng)主要功能：
六大功能
四數(shù)據(jù)庫(kù)操作語(yǔ)言：
SQL語(yǔ)言實(shí)現(xiàn)增刪查改
實(shí)驗(yàn)內(nèi)容：
1.用VS2010創(chuàng)建名為
insert into T_Student(sno,sname,ssex,sage,sdept) values('','','','','')
select * from T_Student
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2001','李勇','男','20','CS')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2002','劉晨','女','18','CS')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2003','王敏','女','19','MA')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2004','張立','男','22','IS')
insert into T_Course(Cno,Cname,Ccode) values ('1','數(shù)據(jù)庫(kù)','1')
insert into T_Course(Cno,Cname,Ccode) values ('2','英語(yǔ)','4')
insert into T_SC(Cno,Sno,Grade) values ('1','2001','88')
insert into T_SC(Cno,Sno,Grade) values ('2','2002','80')
增加一條學(xué)號(hào)為2006文兢，姓名為張揚(yáng)
insert into T_student(sno,sname,ssex) values ('','','')
(sno,sname,ssex,sage,sdept) ('','','','','')空字符串
select * from t_student where sname='李勇'
select * from t_student where ssex='女'
select sdept from t_student where sname='張立'
select count() from T_student
select max() from t_student
update t_student set ssex='女' where sno='2001'
update t_student set sage='22' where sname='王敏'
update t_student sdept='MA' where ssex='男'

insert into T_Student (sno,sname,ssex) values ('2006','張揚(yáng)','男')
delete from t_student where sno='2006'
delete from t_student where sage=22

create table t_course(
cno int primary key,
cname varchar(10),
ccode int
);
create view as(
select sno,sname,cno,cname,grade from t_student,t_sc,t_course where t_student.sno=t_sc.sno and
t_sc. cno=t_course.cno
);
一。數(shù)據(jù)庫(kù)基本概念：
數(shù)據(jù)焕檬、數(shù)據(jù)庫(kù)姆坚。數(shù)據(jù)模型/DBMS（數(shù)據(jù)庫(kù)管理系統(tǒng)）/DBS（數(shù)據(jù)庫(kù)系統(tǒng)）
二。數(shù)據(jù)庫(kù)內(nèi)部組成
二維表实愚、視圖兼呵，索引
三，數(shù)據(jù)庫(kù)管理系統(tǒng)主要功能：
六大功能
四數(shù)據(jù)庫(kù)操作語(yǔ)言：
SQL語(yǔ)言實(shí)現(xiàn)增刪查改
實(shí)驗(yàn)內(nèi)容：
1.用VS2010創(chuàng)建名為
insert into T_Student(sno,sname,ssex,sage,sdept) values('','','','','')
select * from T_Student
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2001','李勇','男','20','CS')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2002','劉晨','女','18','CS')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2003','王敏','女','19','MA')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2004','張立','男','22','IS')
insert into T_Course(Cno,Cname,Ccode) values ('1','數(shù)據(jù)庫(kù)','1')
insert into T_Course(Cno,Cname,Ccode) values ('2','英語(yǔ)','4')
insert into T_SC(Cno,Sno,Grade) values ('1','2001','88')
insert into T_SC(Cno,Sno,Grade) values ('2','2002','80')
增加一條學(xué)號(hào)為2006腊敲，姓名為張揚(yáng)
insert into T_student(sno,sname,ssex) values ('','','')
(sno,sname,ssex,sage,sdept) ('','','','','')空字符串
select * from t_student where sname='李勇'
select * from t_student where ssex='女'
select sdept from t_student where sname='張立'
select count() from T_student
select max() from t_student
update t_student set ssex='女' where sno='2001'
update t_student set sage='22' where sname='王敏'
update t_student sdept='MA' where ssex='男'

insert into T_Student (sno,sname,ssex) values ('2006','張揚(yáng)','男')
delete from t_student where sno='2006'
delete from t_student where sage=22

create table t_course(
cno int primary key,
cname varchar(10),
ccode int
);
create view as(
select sno,sname,cno,cname,grade from t_student,t_sc,t_course where t_student.sno=t_sc.sno and
t_sc. cno=t_course.cno
);
一击喂。數(shù)據(jù)庫(kù)基本概念：
數(shù)據(jù)、數(shù)據(jù)庫(kù)碰辅。數(shù)據(jù)模型/DBMS（數(shù)據(jù)庫(kù)管理系統(tǒng)）/DBS（數(shù)據(jù)庫(kù)系統(tǒng)）
二懂昂。數(shù)據(jù)庫(kù)內(nèi)部組成
二維表、視圖没宾，索引
三凌彬，數(shù)據(jù)庫(kù)管理系統(tǒng)主要功能：
六大功能
四數(shù)據(jù)庫(kù)操作語(yǔ)言：
SQL語(yǔ)言實(shí)現(xiàn)增刪查改
實(shí)驗(yàn)內(nèi)容：
1.用VS2010創(chuàng)建名為
insert into T_Student(sno,sname,ssex,sage,sdept) values('','','','','')
select * from T_Student
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2001','李勇','男','20','CS')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2002','劉晨','女','18','CS')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2003','王敏','女','19','MA')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2004','張立','男','22','IS')
insert into T_Course(Cno,Cname,Ccode) values ('1','數(shù)據(jù)庫(kù)','1')
insert into T_Course(Cno,Cname,Ccode) values ('2','英語(yǔ)','4')
insert into T_SC(Cno,Sno,Grade) values ('1','2001','88')
insert into T_SC(Cno,Sno,Grade) values ('2','2002','80')
增加一條學(xué)號(hào)為2006，姓名為張揚(yáng)
insert into T_student(sno,sname,ssex) values ('','','')
(sno,sname,ssex,sage,sdept) ('','','','','')空字符串
select * from t_student where sname='李勇'
select * from t_student where ssex='女'
select sdept from t_student where sname='張立'
select count() from T_student
select max() from t_student
update t_student set ssex='女' where sno='2001'
update t_student set sage='22' where sname='王敏'
update t_student sdept='MA' where ssex='男'

insert into T_Student (sno,sname,ssex) values ('2006','張揚(yáng)','男')
delete from t_student where sno='2006'
delete from t_student where sage=22

``*
實(shí)驗(yàn)內(nèi)容：
1.用VS2010創(chuàng)建名為
insert into T_Student(sno,sname,ssex,sage,sdept) values('','','','','')
select * from T_Student
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2001','李勇','男','20','CS')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2002','劉晨','女','18','CS')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2003','王敏','女','19','MA')
insert into T_Student(Sno,Sname,Ssex,Sage,Sdept) values ('2004','張立','男','22','IS')
insert into T_Course(Cno,Cname,Ccode) values ('1','數(shù)據(jù)庫(kù)','1')
insert into T_Course(Cno,Cname,Ccode) values ('2','英語(yǔ)','4')
insert into T_SC(Cno,Sno,Grade) values ('1','2001','88')
insert into T_SC(Cno,Sno,Grade) values ('2','2002','80')
增加一條學(xué)號(hào)為2006循衰，姓名為張揚(yáng)
insert into T_student(sno,sname,ssex) values ('','','')
(sno,sname,ssex,sage,sdept) ('','','','','')空字符串
select * from t_student where sname='李勇'
select * from t_student where ssex='女'
select sdept from t_student where sname='張立'
select count() from T_student
select max() from t_student
update t_student set ssex='女' where sno='2001'
update t_student set sage='22' where sname='王敏'
update t_student sdept='MA' where ssex='男'

insert into T_Student (sno,sname,ssex) values ('2006','張揚(yáng)','男')
delete from t_student where sno='2006'
delete from t_student where sage=22

課程二：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        try 
        {
            string strCon = "Data Source =.\\sqlexpress;Initial Catalog=XSGL;Integrated Security=True";
            SqlConnection mycon = new SqlConnection(strCon);
            mycon.Open();

            

            

            string StrUpd = "update T_Student set sage='25' where sname='張立'";
            SqlCommand mycmd = new SqlCommand(StrUpd, mycon);
            mycmd.ExecuteNonQuery();

            string strSel = "select sno as 學(xué)號(hào),sname as 姓名,ssex as 性別,sage as 年齡,sdept as 專業(yè) from T_Student";
            SqlDataAdapter myda = new SqlDataAdapter(strSel, mycon);
            DataTable dt = new DataTable();
            myda.Fill(dt);
            dataGridView1.DataSource = dt;

            MessageBox.Show("update sucess!");
            mycon.Close();
            
        }
            //MessageBox.Show("update sucess!");
        catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
    }
}
}

直接界面能改

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace shujuku
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        try
        {
            string strCon = "Data Source =.\\sqlexpress;Initial Catalog=XSGL;Integrated Security=True";
            SqlConnection mycon = new SqlConnection(strCon);
            mycon.Open();





            //string StrUpd = "update T_Student set sage='25' where sname='張立'";
            //SqlCommand mycmd = new SqlCommand(StrUpd, mycon);
            //mycmd.ExecuteNonQuery();

            string strSel = "select sno as 學(xué)號(hào),sname as 姓名,ssex as 性別,sage as 年齡,sdept as 專業(yè) from T_Student";
            SqlDataAdapter myda = new SqlDataAdapter(strSel, mycon);
            DataTable dt = new DataTable();
            myda.Fill(dt);
            dataGridView1.DataSource = dt;

            //string StrUpd = "update T_Student set sname='李晨' where sno='2001'";
            //SqlCommand mycmd = new SqlCommand(StrUpd, mycon);
            //mycmd.ExecuteNonQuery();

            //MessageBox.Show("update sucess!");
            mycon.Close();

        }
        //MessageBox.Show("update sucess!");
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
        string strCon = "Data Source =.\\sqlexpress;Initial Catalog=XSGL;Integrated Security=True";
        SqlConnection mycon = new SqlConnection(strCon);
        mycon.Open();

        string sname = textBox1.Text;
        string sage = textBox2.Text;



        string StrUpd = "update T_Student set sage='" + sage + "' where sname='" + sname + "'";
        SqlCommand mycmd = new SqlCommand(StrUpd, mycon);
        mycmd.ExecuteNonQuery();

        string strSel = "select sno as 學(xué)號(hào),sname as 姓名,ssex as 性別,sage as 年齡,sdept as 專業(yè) from T_Student";
        SqlDataAdapter myda = new SqlDataAdapter(strSel, mycon);
        DataTable dt = new DataTable();
        myda.Fill(dt);
        dataGridView1.DataSource = dt;

        

        MessageBox.Show("update sucess!");
        mycon.Close();
    }

    private void richTextBox1_TextChanged(object sender, EventArgs e)
    {

    }

    private void button3_Click(object sender, EventArgs e)
    {

    }
}
}

界面添加信息

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace shujuku
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
try
{
string strCon = "Data Source =.\\sqlexpress;Initial Catalog=XSGL;Integrated Security=True";
SqlConnection mycon = new SqlConnection(strCon);
mycon.Open();





//string StrUpd = "update T_Student set sage='25' where sname='張立'";
//SqlCommand mycmd = new SqlCommand(StrUpd, mycon);
//mycmd.ExecuteNonQuery();

string strSel = "select sno as 學(xué)號(hào),sname as 姓名,ssex as 性別,sage as 年齡,sdept as 專業(yè) from T_Student";
SqlDataAdapter myda = new SqlDataAdapter(strSel, mycon);
DataTable dt = new DataTable();
myda.Fill(dt);
dataGridView1.DataSource = dt;

//string StrUpd = "update T_Student set sname='李晨' where sno='2001'";
//SqlCommand mycmd = new SqlCommand(StrUpd, mycon);
//mycmd.ExecuteNonQuery();

//MessageBox.Show("update sucess!");
mycon.Close();

}
//MessageBox.Show("update sucess!");
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}

private void button1_Click(object sender, EventArgs e)
{
string strCon = "Data Source =.\\sqlexpress;Initial Catalog=XSGL;Integrated Security=True";
SqlConnection mycon = new SqlConnection(strCon);
mycon.Open();

string sname = textBox1.Text;
string sage = textBox2.Text;
string sno = textBox3.Text;
string ssex = textBox4.Text;
string sdept = textBox5.Text;



//string StrUpd = "update T_Student set sage='" + sage + "' where sname='" + sname + "'";
string StrUpd = "insert into T_Student(Sno,Sname,Ssex,Sage,Sdept)  values ('"+sno+"','"+sname+"','"+ssex+"','"+sage+"','"+sdept+"')";

SqlCommand mycmd = new SqlCommand(StrUpd, mycon);
mycmd.ExecuteNonQuery();

string strSel = "select sno as 學(xué)號(hào),sname as 姓名,ssex as 性別,sage as 年齡,sdept as 專業(yè) from T_Student";
   
SqlDataAdapter myda = new SqlDataAdapter(strSel, mycon);
DataTable dt = new DataTable();
myda.Fill(dt);
dataGridView1.DataSource = dt;



MessageBox.Show("update sucess!");
mycon.Close();
}

private void richTextBox1_TextChanged(object sender, EventArgs e)
{

}

private void button3_Click(object sender, EventArgs e)
{

}
}
}

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最后編輯于：2017.12.10 10:21:12

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