WW-02-05 - Power BI sometimes validation fails
This video nearly wasn't made, luckily the plan was already to do a video on validation so it all slotted together.
So often even with the best plans things do not quite go as expected. In this case, a minor "niggle" turned into a complete rewrite so remember the key points.
1 - Always name things rather than accept defaults (M will normally let you at least name a column when it is being brought in... do this)
2 - Comments and Step Names are a MUST (I am really terrible and just leaving these steps)
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