Java android.database.sqlite.SQLiteException:near";)&引用;:语法错误(代码1):
我正试图在DB中创建一个表,但是我遇到了SQLite异常。我已经尝试了几乎所有的方法来修复它,但是没有用。我不知道为什么会出现这个错误。删除末尾的逗号会出现另一个异常:Java android.database.sqlite.SQLiteException:near";)&引用;:语法错误(代码1):,java,android,mysql,sql,sqlite,Java,Android,Mysql,Sql,Sqlite,我正试图在DB中创建一个表,但是我遇到了SQLite异常。我已经尝试了几乎所有的方法来修复它,但是没有用。我不知道为什么会出现这个错误。删除末尾的逗号会出现另一个异常:android.database.sqlite.SQLiteException:table products没有名为_cost的列(代码1): 欢迎提出任何建议。 我怎么修理它 这是我的DB处理程序类: public class MyDBHandler extends SQLiteOpenHelper { private
android.database.sqlite.SQLiteException:table products没有名为_cost的列(代码1):
欢迎提出任何建议。
我怎么修理它 这是我的DB处理程序类:
public class MyDBHandler extends SQLiteOpenHelper {
private static final int DATABASE_VERSION = 4;
private static final String DATABASE_NAME= "products.db";
private static final String TABLE_PRODUCTS = "products";
private static final String COLUMN_ID = "_id";
private static final String COLUMN_PRODUCTNAME = "productname";
private static final String COLUMN_VENUE = "venue";
private static final String COLUMN_DATEOFSTART = "_dateofstart";
private static final String COLUMN_DATEOFEND = "_dateofend";
private static final String DURATION_WORKSHOP= "_duration";
private static final String COST_WORKSHOP = "_cost";
public MyDBHandler(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
super(context,DATABASE_NAME, factory,DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
String query = "CREATE TABLE " + TABLE_PRODUCTS + "(" +
COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
COLUMN_PRODUCTNAME + " TEXT, " +
COLUMN_VENUE + " TEXT, " +
COLUMN_DATEOFSTART + " TEXT, " +
COLUMN_DATEOFEND + " TEXT, " +
DURATION_WORKSHOP + "INTEGER, " +
COST_WORKSHOP + "INTEGER, " +
");" ;
db.execSQL(query);
}
@Override
public void onUpgrade(SQLiteDatabase db, int i, int i1) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_PRODUCTS);
onCreate(db);
}
public void addProduct (Products products){
ContentValues values = new ContentValues();
values.put(COLUMN_PRODUCTNAME,products.get_productname());
values.put(COLUMN_VENUE,products.get_venue());
values.put(COLUMN_DATEOFSTART,products.get_dateofstart());
values.put(COLUMN_DATEOFEND,products.get_dateofend());
values.put(DURATION_WORKSHOP,products.get_duration());
values.put(COST_WORKSHOP,products.get_cost());
SQLiteDatabase db = getWritableDatabase();
db.insert(TABLE_PRODUCTS,null,values);
db.close();
}
LOGCAT:
Caused by: android.database.sqlite.SQLiteException: near ")": syntax error (code 1): , while compiling: CREATE TABLE products(_id INTEGER PRIMARY KEY AUTOINCREMENT, productname TEXT, venue TEXT, _dateofstart TEXT, _dateofend TEXT, _durationINTEGER, _costINTEGER, );
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1675)
at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1606)
at com.example.dell_1.sqlite.MyDBHandler.onCreate(MyDBHandler.java:38)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:251)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)
at com.example.dell_1.sqlite.MyDBHandler.addProduct(MyDBHandler.java:57)
at com.example.dell_1.sqlite.MainActivity.onCreate(MainActivity.java:24)
at android.app.Activity.performCreate(Activity.java:6705)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
原因:android.database.sqlite.SQLiteException:near“)”:编译时语法错误(代码1):创建表产品(\u id INTEGER主键自动递增、productname文本、场地文本、\u dateofstart文本、\u dateofend文本、\u durationINTEGER、\u costINTEGER、);
位于android.database.sqlite.SQLiteConnection.nativePrepareStatement(本机方法)
位于android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
位于android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
位于android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
位于android.database.sqlite.SQLiteProgram.(SQLiteProgram.java:58)
位于android.database.sqlite.SQLiteStatement.(SQLiteStatement.java:31)
位于android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1675)
位于android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1606)
位于com.example.dell_1.sqlite.MyDBHandler.onCreate(MyDBHandler.java:38)
位于android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:251)
位于android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)
位于com.example.dell_1.sqlite.MyDBHandler.addProduct(MyDBHandler.java:57)
位于com.example.dell_1.sqlite.MainActivity.onCreate(MainActivity.java:24)
位于android.app.Activity.performCreate(Activity.java:6705)
位于android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)上
位于android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
位于android.app.ActivityThread.-wrap12(ActivityThread.java)
在android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)上
位于android.os.Handler.dispatchMessage(Handler.java:102)
位于android.os.Looper.loop(Looper.java:154)
位于android.app.ActivityThread.main(ActivityThread.java:6077)
位于java.lang.reflect.Method.invoke(本机方法)
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)上
位于com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
第38行是
db.execSQL(查询)代码>第57行是SQLiteDatabase db=getwriteabledatabase()代码>将您的查询替换为以下内容
String query = "CREATE TABLE " + TABLE_PRODUCTS + "(" +
COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
COLUMN_PRODUCTNAME + " TEXT, " +
COLUMN_VENUE + " TEXT, " +
COLUMN_DATEOFSTART + " TEXT, " +
COLUMN_DATEOFEND + " TEXT, " +
DURATION_WORKSHOP + "INTEGER, " +
COST_WORKSHOP + "INTEGER " +
");" ;
实际上,您在查询的末尾添加了一个额外的值。将“自动增量”更改为“自动增量”,并在列成本之后删除“额外”
String query = "CREATE TABLE " + TABLE_PRODUCTS + "(" +
COLUMN_ID + " INTEGER PRIMARY KEY AUTO_INCREMENT, " +
COLUMN_PRODUCTNAME + " TEXT, " +
COLUMN_VENUE + " TEXT, " +
COLUMN_DATEOFSTART + " TEXT, " +
COLUMN_DATEOFEND + " TEXT, " +
DURATION_WORKSHOP + " INTEGER, " +
COST_WORKSHOP + " INTEGER " +
");" ;
将您的查询更改为此
String query = "CREATE TABLE " + TABLE_PRODUCTS + "(" +
COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
COLUMN_PRODUCTNAME + " TEXT, " +
COLUMN_VENUE + " TEXT, " +
COLUMN_DATEOFSTART + " TEXT, " +
COLUMN_DATEOFEND + " TEXT, " +
DURATION_WORKSHOP + " INTEGER, " +
COST_WORKSHOP + " INTEGER " +
");" ;
您在那里有格式错误。一个额外的逗号和两个列名与其列类型连接在一起。请参阅,以了解例如\u costINTEGER
应如何\u cost INTEGER
将查询更改为此,您缺少一些空格,并且必须从查询中删除最后一个逗号
@Override
public void onCreate(SQLiteDatabase db) {
String query = "CREATE TABLE " + TABLE_PRODUCTS + "(" +
COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
COLUMN_PRODUCTNAME + " TEXT, " +
COLUMN_VENUE + " TEXT, " +
COLUMN_DATEOFSTART + " TEXT, " +
COLUMN_DATEOFEND + " TEXT, " +
DURATION_WORKSHOP + " INTEGER, " +
COST_WORKSHOP + " INTEGER " +
");" ;
db.execSQL(query);
}
去掉COST\u WORKSHOP+“INTEGER,++
结尾的逗号,它需要另一个字段我已经尝试过了,但是在这样做之后,它给出了另一个异常:android.database.sqlite.SQLiteException:table products没有名为_COST(代码1)的列:
该行的INTEGER
前面还缺少一个空格。请查看堆栈跟踪第一行末尾附近的位置_costINTEGER,)代码>-看到那个多余的逗号了吗?摆脱它!我已经尝试过了,但在这样做之后,它给出了另一个异常:android.database.sqlite.SQLiteException:table products没有名为_cost(代码1)的列:
\u cost列在列列表中没有位置-@Ce