語法錯誤，當我添加一個新的表

現在，我添加一個新表sqlitedatabase從1更改databae_version版本2（我的新表類）這是我在BooksDBHelper語法錯誤，當我添加一個新的表

代碼

package com.example.mutitablesql.db; 


import android.content.Context; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteDatabase.CursorFactory; 
import android.database.sqlite.SQLiteOpenHelper; 

public class BooksDBHelper extends SQLiteOpenHelper { 
//databse_name 
public static String DATABSE_NAME = "bookguk"; 
// database_version 
public static int DATABASE_VERSION = 2; 
//table name 
public static String TABLE_BOOK = "books"; 
public static String TABLE_IMAGE = "images"; 
public static String TABLE_INGREDIENT = "ingredients"; 
public static String TABLE_CATEGORY = "category"; 
//column_name 
public static String KEY_ID = "id"; 
public static String KEY_TITLE = "title"; 
public static String KEY_SOLUTION = "solution"; 
public static String KEY_BOK_ID = "bookID"; 
public static String KEY_fILEPATH = "filepath"; 
public static String KEY_VALUE = "value" ; 
public static String KEY_UNIT = "unit"; 
public static String KEY_NAME = "name"; 
public static String KEY_CAT_ID = "cat_id"; 

public static String BOOK_CREATE_SQL = "CREATE TABLE IF NOT EXISTS " + TABLE_BOOK + "(" + 
           ""+KEY_ID+" INTEGER PRIMARY KEY AUTOINCREMENT," + 
           ""+KEY_TITLE+" TEXT(50) not null," + 
           ""+KEY_SOLUTION+" TEXT(255) not null," + 
           ""+KEY_CAT_ID+" INTEGER(11)," + 
           " FOREIGN KEY("+KEY_CAT_ID+") REFERENCE "+TABLE_CATEGORY+" ("+KEY_ID+"))"; 

public static String IMAGE_CREATE_SQL = "CREATE TABLE IF NOT EXISTS " + TABLE_IMAGE + "(" + 
           ""+KEY_ID+" INTEGER PRIMARY KEY AUTOINCREMENT," + 
           ""+KEY_fILEPATH+" VACHAR(255)," + 
           ""+KEY_BOK_ID+" INTEGER(11)," + 
           " FOREIGN KEY("+KEY_BOK_ID+") REFERENCES "+TABLE_BOOK+" ("+KEY_ID+"))"; 

public static String INGREDIENT_CREATE_SQL = "CREATE TABLE IF NOT EXISTS " + TABLE_INGREDIENT + "(" + 
           ""+KEY_ID+" INTEGER PRIMARY KEY AUTOINCREMENT," + 
           ""+KEY_VALUE+" DOUBLE(11)," + 
           ""+KEY_UNIT+" VACHAR(50)," + 
           ""+KEY_fILEPATH+" VACHAR(255)," + 
           ""+KEY_BOK_ID+" INTEGER(11)," + 
           " FOREIGN KEY("+KEY_BOK_ID+")REFERENCES "+TABLE_BOOK+" ("+KEY_ID+"))"; 

public static String CATEGORY_CREATE_SQL = "CREATE TABLE IF NOT EXISTS " + TABLE_CATEGORY + "(" + 
           ""+KEY_ID+" INTEGER PRIMARY KEY AUTOINCREMENT," + 
           ""+KEY_NAME+" VACHAR(50) " + 
           ")"; 



//constructor 
public BooksDBHelper(Context context) { 
    super(context, DATABSE_NAME, null, DATABASE_VERSION); 
    // TODO Auto-generated constructor stub 
} 

//create 
@Override 
public void onCreate(SQLiteDatabase db) { 
    db.execSQL(BOOK_CREATE_SQL); 
    db.execSQL(IMAGE_CREATE_SQL); 
    db.execSQL(INGREDIENT_CREATE_SQL); 
    db.execSQL(CATEGORY_CREATE_SQL); 

} 

@Override 
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
    // TODO Auto-generated method stub 
    db.execSQL("DROP TABLE " + TABLE_BOOK); 
    db.execSQL("DROP TABLE " + TABLE_IMAGE); 
    db.execSQL("DROP TABLE " + TABLE_INGREDIENT); 
    db.execSQL("DROP TABLE " + TABLE_CATEGORY); 
    onCreate(db); 

}

}

，這是我的logcat錯誤編輯

08-31 08:04:06.957: E/SQLiteLog(1683): (1) no such table: category 
08-31 08:04:06.978: D/AndroidRuntime(1683): Shutting down VM 
08-31 08:04:06.978: W/dalvikvm(1683): threadid=1: thread exiting with uncaught exception (group=0x40a71930) 
08-31 08:04:07.007: E/AndroidRuntime(1683): FATAL EXCEPTION: main 
08-31 08:04:07.007: E/AndroidRuntime(1683): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mutitablesql/com.example.mutitablesql.MainActivity}: android.database.sqlite.SQLiteException: no such table: category (code 1): , while compiling: DROP TABLE category 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.app.ActivityThread.access$600(ActivityThread.java:141) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.os.Handler.dispatchMessage(Handler.java:99) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.os.Looper.loop(Looper.java:137) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.app.ActivityThread.main(ActivityThread.java:5041) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at java.lang.reflect.Method.invokeNative(Native Method) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at java.lang.reflect.Method.invoke(Method.java:511) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at dalvik.system.NativeStart.main(Native Method) 
08-31 08:04:07.007: E/AndroidRuntime(1683): Caused by: android.database.sqlite.SQLiteException: no such table: category (code 1): , while compiling: DROP TABLE category 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:882) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:493) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1663) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1594) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at com.example.mutitablesql.db.BooksDBHelper.onUpgrade(BooksDBHelper.java:80) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:257) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at com.example.mutitablesql.db.BooksDB.<init>(BooksDB.java:23) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at com.example.mutitablesql.MainActivity.onCreate(MainActivity.java:21) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.app.Activity.performCreate(Activity.java:5104) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
08-31 08:04:07.007: E/AndroidRuntime(1683):  ... 11 more

之前，我從sqlite的添加新表格。它不是有語法錯誤在我BooksDBHelper請ç heck it.and告訴我哪一行是語法錯誤。謝謝

來源

2013-08-31 Tuangsit Arpanurak

也許你需要'EXITSbooks'之間的額外空間，使命令，如：'DROP TABLE IF退出books'？（在'onUpgrade'中） –

db.execSQL（「DROP TABLE IF EXITS」+ TABLE_BOOK）;你是這個意思嗎？ –

'db.execSQL（「DROP TABLE IF EXISTS'」+ TABLE_BOOK +「'」）;'它工作嗎？ –

表創建順序是錯誤

@Override 
public void onCreate(SQLiteDatabase db) { 
    db.execSQL(CATEGORY_CREATE_SQL); 
    db.execSQL(BOOK_CREATE_SQL); 
    db.execSQL(IMAGE_CREATE_SQL); 
    db.execSQL(INGREDIENT_CREATE_SQL); 
}

來源

2013-08-31 08:00:33

語法錯誤，當我添加一個新的表

回答

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