FROM错误的android声明SQLite数据库

FROM错误的android声明SQLite数据库

关注
发信
关注(28)粉丝(399)

在SELECT * FROM错误的android声明SQLite数据库

本文介绍了在SELECT * FROM错误的android声明SQLite数据库的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个数据库使用我使用SELECT * FROM语句的外键，但我不断收到一个错误，当我尝试查看数据库中。

I have a Database With a foreign key I am using the SELECT * FROM statement but I keep getting an error when I try to view the database.

SELECT * FROM语句 

 private final String MY_QUERY = "SELECT * FROM wwTable mLat INNER JOIN wwTimeTable _id ON wwTable._id=wwTimeTable.mName WHERE Table._id=wwTimetabel.mForeign";

我的钥匙 

public static final String KEY_ROWID = "_id";
public static final String KEY_ROWIDLL = "_id";
public static final String KEY_ROWIDTIME = "_id";
public static final String KEY_NAME = "mName";
public static final String KEY_LAT = "mLat";
public static final String KEY_LON = "mLon";
public static final String KEY_HOUR = "mHour";
public static final String KEY_MINUT = "mMinut";
public static final String KEY_DAY = "mDay";
public static final String KEY_MONTH = "mMonth";
public static final String KEY_YEAR = "mYear";
public static final String KEY_FOREIGN = "mForeign";

的onCreate EXECSQL 

 @Override
        public void onCreate(SQLiteDatabase db) {
            // TODO Auto-generated method stub
            db.execSQL("CREATE TABLE " + WW_TABLE +
                    " (" + KEY_ROWIDLL + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
                    KEY_LAT + " TEXT NOT NULL, " +
                    KEY_LON + " TEXT NOT NULL);");
            db.execSQL("CREATE TABLE " + WW_TIMETABLE +
                    " (" + KEY_ROWIDTIME + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
                    KEY_HOUR + " TEXT NOT NULL, " +
                    KEY_FOREIGN + " INTEGER," +
                    " FOREIGN KEY ("+KEY_FOREIGN+") REFERENCES "+WW_TABLE+" ("+KEY_ROWIDLL+") ON DELETE CASCADE);");

CURSOR RAWQUERY 

  public Cursor fetchTime() {
        // TODO Auto-generated method stub
        //return ourdb.query(WW_TIMETABLE, new String[] {KEY_ROWIDTIME, KEY_HOUR, KEY_FOREIGN}, null, null, null, null, null);
        return ourdb.rawQuery(MY_QUERY, new String[]{String.valueOf(KEY_FOREIGN)});

    }

如何我查看全部IT内部的LISTACTIVITY的 

private void fillData() {
     // Get all of the rows from the database and create the item list

    mTimeNotesCursor = mDbHelper.fetchTime();
    startManagingCursor(mTimeNotesCursor);
   // startManagingCursor(mNotesCursor);

    // Create an array to specify the fields we want to display in the list (only TITLE)
    String[] from = new String[]{WWDatabase.KEY_HOUR,WWDatabase.KEY_FOREIGN};

    //String[] fromTime = new String[]{WWDatabase.KEY_HOUR};


    // and an array of the fields we want to bind those fields to (in this case just text1)
    int[] to = new int[]{R.id.textView2, R.id.textView3};

   //int[] toTime = new int[]{R.id.textView4};

    // Now create a simple cursor adapter and set it to display
    SimpleCursorAdapter notes =
        new SimpleCursorAdapter(this, R.layout.time_text_row, mTimeNotesCursor, from, to);

    setListAdapter(notes);
   // SimpleCursorAdapter notesTime =

       //new SimpleCursorAdapter(this, R.layout.time_text_row, mTimeNotesCursor, fromTime, toTime);
        //setListAdapter(notesTime);
}

堆栈跟踪 

01-04 09:47:30.260: E/AndroidRuntime(273): FATAL EXCEPTION: main
01-04 09:47:30.260: E/AndroidRuntime(273): java.lang.RuntimeException: Unable to start activity ComponentInfo{www.freshapp.com.wherewhen.html/www.freshapp.com.wherewhen.html.TimeViewer}: android.database.sqlite.SQLiteException: near "Table": syntax error: , while compiling: SELECT * FROM wwTable mLat INNER JOIN wwTimeTable _id ON wwTable._id=wwTimeTable.mName WHERE Table._id=wwTimetabel.mForeign
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.os.Handler.dispatchMessage(Handler.java:99)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.os.Looper.loop(Looper.java:123)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.app.ActivityThread.main(ActivityThread.java:4627)
01-04 09:47:30.260: E/AndroidRuntime(273):  at java.lang.reflect.Method.invokeNative(Native Method)
01-04 09:47:30.260: E/AndroidRuntime(273):  at java.lang.reflect.Method.invoke(Method.java:521)
01-04 09:47:30.260: E/AndroidRuntime(273):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
01-04 09:47:30.260: E/AndroidRuntime(273):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-04 09:47:30.260: E/AndroidRuntime(273):  at dalvik.system.NativeStart.main(Native Method)
01-04 09:47:30.260: E/AndroidRuntime(273): Caused by: android.database.sqlite.SQLiteException: near "Table": syntax error: , while compiling: SELECT * FROM wwTable mLat INNER JOIN wwTimeTable _id ON wwTable._id=wwTimeTable.mName WHERE Table._id=wwTimetabel.mForeign
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:64)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:80)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:46)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:42)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1345)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1315)
01-04 09:47:30.260: E/AndroidRuntime(273):  at www.freshapp.com.wherewhen.html.WWDatabase.fetchTime(WWDatabase.java:143)
01-04 09:47:30.260: E/AndroidRuntime(273):  at www.freshapp.com.wherewhen.html.TimeViewer.fillData(TimeViewer.java:57)
01-04 09:47:30.260: E/AndroidRuntime(273):  at www.freshapp.com.wherewhen.html.TimeViewer.onCreate(TimeViewer.java:41)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-04 09:47:30.260: E/AndroidRuntime(273):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
01-04 09:47:30.260: E/AndroidRuntime(273):  ... 11 more

我喜欢这个任何帮助。我一直在寻找，现在有一段时间了。

I would love any help on this. I have been looking for some time now.

推荐答案

您的where子句引用表称为一个对象，你有没有在你的FROM子句了。此外，没有多少点，如果你不使用别名混淆你的表..

Your where clause references an object called Table which you haven't got in your FROM clause. Also, there's not much point in aliasing your tables if you're not using the aliases..

我猜测它应该是：

private final String MY_QUERY = "SELECT * FROM wwTable INNER JOIN wwTimeTable ON wwTable._id=wwTimeTable.mName WHERE wwTable._id=wwTimetable.mForeign";

这篇关于在SELECT * FROM错误的android声明SQLite数据库的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

08-28 18:26
Powered by LMLPHP ©2024 FROM错误的android声明SQLite数据库 0.036032