Why do some columns not show in my query?

Question

I created a query but it does not show some of the columns. Why do some columns not show in my query?

Answer

Columns with NULL values in your query will not show by default. If an entire column is full of NULLs, it will always be hidden.

Explore handles NULL values and zeros (0) differently. To include zero values in your query, see the article: How can I include 0 values in Explore reports?