i'm using these codes but I am getting error as "table book info has no column named pdate" 
Database class 's method 

```
public void onCreate(SQLiteDatabase db) {       
// TODO Auto-generated method stub      
String CREATE_BOOK_TABLE = "CREATE TABLE bookinfo ( " +
                "id INTEGER PRIMARY KEY AUTOINCREMENT, " + 
                "title TEXT, "+
                "author TEXT,"+
                 "pdate TEXT)";         
     db.execSQL(CREATE_BOOK_TABLE);     
}

```