1.https://learn.microsoft.com/en-us/power-query/power-query-what-is-power-query
2.https://learn.microsoft.com/en-us/power-query/power-query-ui
3.https://learn.microsoft.com/en-us/power-query/move-columns
4.https://support.microsoft.com/en-us/office/top-ten-ways-to-clean-your-data
5.https://support.microsoft.com/en-us/office/split-text-into-different-columns-with-functions
https://support.microsoft.com/en-us/office/add-or-change-data-types-power-query