尝试在 Android java 中更新 sqlite 数据库中的现有行时出错？

我正在尝试使用编辑文本中的值更新数据库。但是我在记录器中收到一个错误：“*** Process: com.example.coursework2, PID: 12430 android.database.sqlite.SQLiteException: no such column: Wordc (code 1 SQLITE_ERROR): , while compiling: UPDATE Phrases_table SET word = Word WHERE word = Wordc at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)

Wordc 是存储在数据库中的单词，“Word”是我尝试更新数据库的值。我是新手，请帮忙。**

// 数据库类，我只有 1 列是 COL_2

public void updateName(String newName,String oldName) { // issue is here
    SQLiteDatabase db = this.getWritableDatabase();
    String query = "UPDATE " + TABLE_NAME + " SET " + COL_2 + " = " + newName + " WHERE " + COL_2 + " = " + oldName;
    db.execSQL(query);

/* 编辑类，当我点击保存按钮时，我从单选按钮获取值，并希望用编辑文本中的值更新数据库 */

 buttonSave.setOnClickListener(
            new View.OnClickListener() {
                @Override
                public void onClick(View v) {

                    int pos = listView.getCheckedItemPosition();
                    if (pos > -1) {
                        val = list.get(pos).toString(); //getting value from the radio button which is stored in the database

                       String newWord= edit.getText().toString(); //getting text from edit text


                       myDb.updateName( newWord,val ); 

                    }