tableau join data sources

Complex data sources are common problems in report development, such as the join operation of different database tables, and the subsequent filtering grouping sorting. Jasperreport/birt and other reporting tools, such as virtual data source or table join, can be used to achi

similar to the split transformation, unlike the multi-point transfer, which outputs all the rows, and split will conditionally output some of the rows.UnionAll: Merges transformations of multiple datasets.Combining the functionality and merging of all tasks is just the opposite of merging multiple data sources into one result set. For example, merge data from tw

1 concat The Concat function is a method underneath the pandas that allows for a simple fusion of data based on different axes. Pd.concat (Objs, axis=0, join= ' outer ', Join_axes=none, Ignore_index=false, Keys=none, Levels=none, Names=None, Verify_integrity=false)1 2 1 2 1 2 Parameter descriptionObjs:series,dataframe or a sequence of panel compositions lsitAxis: Axis that needs to merge links, 0