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- CROSSJOIN is a table function that performs the CROSSJOIN of two tables. CROSSJOIN is the Cartesian product of the values in the two tables, meaning that for every row in the first table, you will have all the values in the second table. Letamp;#39;s see that with an example. Here Iamp;#39;m using ADDCOLUMNS over the CROSSJOIN of all the VALUES of product color and all the VALUES of product category. So any value of color is joined with any value of the category. That includes non-existing combinations; and we can see that because ADDCOLUMNS later creates the new column, number of products that uses CALCULATE COUNTROWS of product. So itamp;#39;s computing the number of products of the given color and the given category. If you look at the result you see that for computers we have black, blue, brown, gold we have nearly all the colors, but when we come to television and video we have products which are black but there is no product that is blue. So CROSSJOIN generated all the po
