SELECT * FROM语句android SQLite数据库出错

时间：2012-01-04 17:57:57

标签： android database sqlite foreign-keys

我有一个数据库使用外键我正在使用SELECT * FROM语句但是当我尝试查看数据库时我一直收到错误。

SELECT * FROM STATEMENT 

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

MY KEYS 

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";

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)});

    }

我如何查看所有内容的内容 

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);
}

STACK TRACE 

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

我很乐意为此提供帮助。我一直在寻找一些时间。

2 个答案:

答案 0 :(得分：2)

您的where子句引用了一个名为Table的对象，您在FROM子句中没有这个对象。另外，如果您没有使用别名，那么对表进行别名也没什么意义..

我猜它应该是：

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

答案 1 :(得分：1)

删除from语句中mLat之后的wwTable。

正确的语法是：select * from table inner join other_table ...

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