Java内部连接语句
SQL代码在mysql中运行得非常好,我在这个应用程序中的其他语句也能正常工作,但是这个语句说我的表不存在,但它确实存在,确保所有语法都正确,所以我不理解为什么它不工作,我的代码发布在下面Java内部连接语句,java,sql,exception,inner-join,Java,Sql,Exception,Inner Join,SQL代码在mysql中运行得非常好,我在这个应用程序中的其他语句也能正常工作,但是这个语句说我的表不存在,但它确实存在,确保所有语法都正确,所以我不理解为什么它不工作,我的代码发布在下面 private void salesReportbtnActionPerformed(java.awt.event.ActionEvent evt) { try { con = Driver
private void salesReportbtnActionPerformed(java.awt.event.ActionEvent evt) {
try {
con = DriverManager.getConnection(url, user, password);
stmt = con.createStatement();
result = stmt.executeQuery("SELECT Prod_Srv_ID , `The_Organizations_Organization_Name` ,"
+ " `Prod_Srv_Details` , `Prod_Srv_Price` , `Prod_Srv_Discount` `Contracts_Contract_Number` ,"
+ " `Shipment_Completed`\n"
+ "FROM product_and_services\n"
+ "JOIN product_contract_line ON product_and_services.Prod_Srv_ID ="
+ " product_contract_line.Product_and_Services_Prod_Srv_ID");
int tempName = 4;
salesReportlist.setText("");
String Shipres;
while (result.next()) {
tempName = tempName + 1;
int prodID = result.getInt("Prod_Srv_ID");
String orgName = result.getString("The_Organizations_Organization_Name");
String Details = result.getString("Prod_Srv_Details");
double Price = result.getDouble("Prod_Srv_Price");
double Discount = result.getDouble("Prod_Srv_Discount");
double contractNum = result.getDouble("Contracts_Contract_Number");
int Ship = result.getInt("Shipment_Completed");
if(Ship == 1)
{
Shipres = "True";
}
else{
Shipres = "False";
}
if (tempName >= 5) {
salesReportlist.setText(salesReportlist.getText() + "\n" + " Product ID: " + prodID + " Organization Name: " + orgName + " Details: " + Details + " Price: " + Price+ " Discount: " + Discount + " Contract Number: " + contractNum + " Shipment Completed: " + Shipres );
} else {
JOptionPane.showMessageDialog(null, "Error");
}
}
} catch (SQLException ex) {
JOptionPane.showMessageDialog(null, ex.getMessage());
}
}
查询中似乎存在空格或逗号问题。解决此问题的最佳方法是打印查询并尝试在sql客户端中执行打印的查询 似乎在
产品Srv\u折扣
合同号
希望这能解决问题。你能在这里共享异常跟踪吗?@KDP java.sql.SQLException:找不到“Prod\u Srv\u折扣”列。
Prod\u Srv\u折扣后缺少逗号。
@Akash Rajbanshi在哪里?很高兴它帮助了你!!