批量修改oracle 数据库所有表某个字段的值

查那些表用此字段  select t.TABLE_NAME,t.COLUMN_NAME,t.DATA_TYPE,t.DATA_LENGTH from user_tab_cols t where t.COLUMN_NAME = '字段名'

不知道怎么用sql语句修改，就用程序简单实现

 DataTable dt =GetDataTable("select t.TABLE_NAME,t.COLUMN_NAME,t.DATA_TYPE,t.DATA_LENGTH from user_tab_cols t where t.COLUMN_NAME = '字段名'");
        int count = dt.Rows.Count;
        List<string> list = new List<string>();
        for (int i = 0; i < count; i++)
        {
            list.Add(" update " + dt.Rows[i]["TABLE_NAME"] + " set 字段名=1");
        }
       int a= ExecSQL(list).Code;