yii\db\mssql\QueryBuilder::dropCommentFromColumn PHP Method

    public function dropCommentFromColumn($table, $column)
    {
        return "sp_dropextendedproperty @name = N'MS_Description', @level1type = N'Table',  @level1name = {$this->db->quoteTableName($table)}, @level2type = N'Column', @level2name = {$this->db->quoteColumnName($column)}";
    }