数据分析师的SQL功底该学到什么程度？

复制selecttop(100) *       from ( select                          OrderId                       ,    OrderMonth                        ,    OrderAmount                        ,    Row_Number() Over(                                                                      OrderBy OrderAmount DESC)                               AS Amt_Order                    from FctSales) tmp        Where Amt_Order between 2000 and 3000  1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.