Question

知道这是一个非常基本的问题，我继续在我的logcat上获取此错误代码：

android.database.sqlite.SQLiteException：near“SELECT_id”：语法错误（代码1）:,同时编译：SELECT_id，name，password FROM GANDALF ORDER BY name

真的需要一些建议，试过看其他创建sqlite表的帖子但是无法解决它。

     public void onCreate(SQLiteDatabase db) {
     db.execSQL("CREATE TABLE gandalf " +
            "(_id INTEGER PRIMARY KEY AUTOINCREMENT,name TEXT,password TEXT, category TEXT);");

}

试试这个

     db.execSQL("CREATE TABLE books ( " +
                "id INTEGER PRIMARY KEY AUTOINCREMENT, " + 
                "name TEXT, "+
                "password TEXT, "+
                "category TEXT)");

datahelper的完整代码公共类DataHelp扩展了SQLiteOpenHelper {

private static final String dbname = "pass.db"; 
private static final int ver = 1;

public DataHelp(Context context) {
    super(context, dbname, null, ver);
    // TODO Auto-generated constructor stub
}

@Override
public void onCreate(SQLiteDatabase db) {
     db.execSQL("CREATE TABLE gandalf " +
            "(_id INTEGER PRIMARY KEY AUTOINCREMENT,name TEXT,password TEXT, category TEXT);");

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    // TODO Auto-generated method stub
}

public void insertDB(String name, String pass){
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues cv = new ContentValues();
    cv.put("Name", name);
    cv.put("Pass", pass);
    db.insert("db", null, cv);
    db.close();
}

public Cursor getAll(){
    return (getReadableDatabase().rawQuery("SELECT_id, name," +
            "password FROM GANDALF ORDER BY name",null));
}

public String getName(Cursor c){
    return(c.getString(1));
}

 public String getPass(Cursor c) {
        return(c.getString(2));
      }

 public String getCat(Cursor c) {
        return(c.getString(3));
      }

}

Answer 1

在SELECT命令

中添加SQL后的空格

db.rawQuery("SELECT _id, name, password FROM GANDALF ORDER BY name",null);

Answer 2

SQLiteDatabase db;

创建表格： db.execSQL（＆＃34;创建表gandalf＆＃34; +＆＃34;（＆＃34; +＆＃34; id＆＃34; +＆＃34; INTEGER PRIMARY KEY AUTOINCREMENT，＆＃34; +＆＃ 34;姓名＆＃34; +＆＃34;文字，＆＃34; +＆＃34;密码＆＃34; +＆＃34;文字，＆＃34; +＆＃34;类别＆＃34; +＆＃34 ; text＆＃34; +＆＃34;）＆＃34;）;

Select Query:
db.rawQuery("select id,name,password from gandalf ORDER BY name",null);

创建SQL表，SQLite异常

2 个答案: