免责声明:这是一个测试/虚拟/假数据库
大家好,我有一个问题,下面是 2 个表结构。当我使用
SELECT CONVERT(char(80), InvDate,3) AS InvDate,InvoiceNo,EmployerCode,TaxAmount + SubTotal AS Amount,'' AS Payment FROM dbo.Invoice;
我希望添加一列患者姓名,并将其标记为发票号。所以我的意思是,当查询被执行时,它应该向我显示与发票号码一起标记的患者详细信息。但是在这两个表结构中都没有链接。我能想到的唯一链接是“MedicalRecordID”。我尝试使用 UNION 函数并没有给我想要的输出。有什么帮助吗?
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 MedicalDataExporter
{
public partial class frmSales : Form
{
public frmSales()
{
InitializeComponent();
}
private void dtpFrom_ValueChanged(object sender, EventArgs e)
{
}
private void btnExtract_Click(object sender, EventArgs e)
{
SqlConnection objConn = new SqlConnection("Data Source=test;Initial Catalog=test;Persist Security Info=True;User ID=test;Password=test");
System.Data.SqlClient.SqlConnection(conStr);
objConn.Open();
SqlCommand objCmd = new SqlCommand("SELECT CONVERT(char(80), InvDate,3) AS InvDate,InvoiceNo,EmployerCode,TaxAmount + SubTotal AS Amount,'' AS Payment FROM Invoice WHERE (InvDate >= CONVERT(datetime, '"+dtpFrom.Text +"', 105 )) AND (InvDate <= CONVERT(datetime, '"+dtpTo.Text+"', 105))", objConn);
SqlDataReader objReader;
objReader = objCmd.ExecuteReader();
System.IO.FileStream fs = new System.IO.FileStream("C:\\CMSExportedData\\Sales-" + DateTime.Now.ToString("dd-MM-yyyy") + ".txt", System.IO.FileMode.Create);
System.IO.StreamWriter sw = new System.IO.StreamWriter(fs, System.Text.Encoding.Default);
int count = 0;
while (objReader.Read())
{
for (int i = 0; i < 5; i++)
{
if (!objReader.IsDBNull(i))
{
string s;
s = objReader.GetDataTypeName(i);
//MessageBox.Show(s);
if (objReader.GetDataTypeName(i) == "char")
{
sw.Write(objReader.GetString(i));
}
else if (objReader.GetDataTypeName(i) == "money")
{
sw.Write(objReader.GetSqlMoney(i).ToString());
}
else if (objReader.GetDataTypeName(i) == "nvarchar")
{
sw.Write(objReader.GetString(i));
}
}
if (i < 4)
{
sw.Write("\t");
}
}
count = count + 1;
sw.WriteLine();
}
sw.Flush();
fs.Close();
objReader.Close();
objConn.Close();
MessageBox.Show(count + " records exported successfully.");
this.Close();
}
private void groupBox1_Enter(object sender, EventArgs e)
{
}
private void dtpTo_ValueChanged(object sender, EventArgs e)
{
}
private void frmSales_Load(object sender, EventArgs e)
{
}
}
}
这是表结构:
这是第二个表结构: