我正在尝试从我的sql数据库中的ORDER表读取数据，但每次尝试都会收到错误：
run-single:
连接数据库
java.sql.SQLSyntaxErrorException: Syntax error: Encountered "ORDER" at line 1, column 15.
at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(Unknown Source)
at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
at org.apache.derby.client.am.Connection.prepareStatement(Unknown Source)
at glassfish.Neasdasda.initializeDB1(Neasdasda.java:1495)
at glassfish.Neasdasda.order(Neasdasda.java:1463)
at glassfish.Neasdasda$3.handle(Neasdasda.java:103)
at glassfish.Neasdasda$3.handle(Neasdasda.java:99)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Node.fireEvent(Node.java:8413)
at javafx.scene.control.Button.fire(Button.java:185)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:381)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:417)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:416)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.derby.client.am.SqlException: Syntax error: Encountered "ORDER" at line 1, column 15.
at org.apache.derby.client.am.Statement.completeSqlca(Unknown Source)
at org.apache.derby.client.net.NetStatementReply.parsePrepareError(Unknown Source)
at org.apache.derby.client.net.NetStatementReply.parsePRPSQLSTTreply(Unknown Source)
at org.apache.derby.client.net.NetStatementReply.readPrepareDescribeOutput(Unknown Source)
at org.apache.derby.client.net.StatementReply.readPrepareDescribeOutput(Unknown Source)
at org.apache.derby.client.net.NetStatement.readPrepareDescribeOutput_(Unknown Source)
at org.apache.derby.client.am.Statement.readPrepareDescribeOutput(Unknown Source)
at org.apache.derby.client.am.PreparedStatement.readPrepareDescribeInputOutput(Unknown Source)
at org.apache.derby.client.am.PreparedStatement.flowPrepareDescribeInputOutput(Unknown Source)
at org.apache.derby.client.am.PreparedStatement.prepare(Unknown Source)
at org.apache.derby.client.am.Connection.prepareStatementX(Unknown Source)
... 52 more
我连接到数据库没有问题，我使用的查询语句没有问题，因为我已经使用相同的查询语句来读取不同的表。
public void order(Stage currentScreen2){
GridPane pane2 = new GridPane();
Button btShowDetails = new Button("Show Details");
pane2.add(btShowDetails, 1, 4);
pane2.setAlignment(Pos.CENTER);
pane2.setPadding(new Insets(40.5,42.5,43.5,40.5));
pane2.setHgap(15.5);
pane2.setVgap(20.5);
Scene scene5 = new Scene(pane2, 1200, 400);
currentScreen2.setTitle("Employees");
currentScreen2.setScene(scene5);
currentScreen2.show();
initializeDB();
//@Override // Override the start method in the Application class
initializeDB2();
hBox1.getChildren().addAll(new Label("ID"), tfid, btShowDetails);
vBox1.getChildren().addAll(hBox1, lblordid, lblcustid, lblprice, lbldescrip, lblpay);
tfid.setPrefColumnCount(6);
//Set event listener
btShowDetails.setOnAction(e -> showDetail());
// Create a scene and place it in the stage
}
private void initializeDB2() {
try {
// Establish a connection
Connection connection = DriverManager.getConnection
//Test1 is the name of the database you created
("jdbc:derby://localhost:1527/SandwichDB");
System.out.println("Database connected");
//Next we want to write the SQL statement we want to run. Note that the fields such as firstName and lastName are named the same as in the Table. The Question mark is the input we will later put in
String queryString = "SELECT * FROM ORDER WHERE ORDERID = ?";
// Create a statement
//Set the prepared Statement to run the queryString we previously set up
preparedStatementss = connection.prepareStatement(queryString);
}
catch (Exception ex) {
ex.printStackTrace();
}
}
private void showDetail() {
//This takes the number entered in the text field and puts it into a string called id
String id = tfid.getText();
try {
//Next we want to replace the ? in the previous query with the input
//The 1 is notifying we want to replace the first ?
preparedStatementss.setString(1, id);
ResultSet rset = preparedStatementss.executeQuery();
//Now it goes through each field and assigns them to a variable
if (rset.next()) {
String ordered = rset.getString(1);
String custard = rset.getString(2);
String pricerd = rset.getString(3);
String descripered = rset.getString(4);
String payered = rset.getString(5);
// Display result in a label
lblordid.setText("Order ID: " + ordered);
lblcustid.setText("Customer ID: " + custard);
lblprice.setText("Price: " + pricerd);
lbldescrip.setText("Description: " + descripered);
lblpay.setText("Payment Type: " + payered);
} else {
lblordid.setText("Not found");
}
}
catch (Exception ex) {
ex.printStackTrace();
}
}
以下是我尝试从数据库中读取的代码。请记住，它从除了这一个之外的所有其他表中读取它，任何帮助将不胜感激。
答案 0 :(得分：4)
ORDER是关键词的一部分（例如ORDER BY），您需要引用表名。变化
String queryString = "SELECT * FROM ORDER WHERE ORDERID = ?";
到
String queryString = "SELECT * FROM `ORDER` WHERE ORDERID = ?";