android - Android SQLite 更新查询不起作用？

Question

public void AddViewCount(String chname)
{
   String selectQuery = "UPDATE  channel_login SET TimesViewed=TimesViewed+1 WHERE channelName="+chname ;
   SQLiteDatabase db = this.getWritableDatabase();
   Cursor cursor = db.rawQuery(selectQuery, null);
   System.out.print("Count"+cursor.getCount());  

}

我收到此错误消息。你能指出罪魁祸首吗？

android.database.sqlite.SQLiteException: no such column: Sat1  
(code   1):,while compiling: UPDATE  channel_login SET       
TimesViewed=TimesViewed+1 WHERE channelName=Sat1

Answer 1

尝试以下操作：

public void AddViewCount(String chname)
{
   String selectQuery = "UPDATE  channel_login SET TimesViewed=TimesViewed+1 WHERE channelName='"+chname+"'";
   SQLiteDatabase db = this.getWritableDatabase();
   Cursor cursor = db.rawQuery(selectQuery, null);
   System.out.print("Count"+cursor.getCount());  

}

在文本值周围添加“”应该可以。此外，除非您需要游标计数，否则您可以只使用它db.execSQL(selectQuery);来执行更新。