Data Blending in Tableau
Автор: Technology mart
Загружено: 2017-03-22
Просмотров: 25125
Data Blending in Tableau enables users to add a secondary data source to the primary data source and displays them together.Joins query one source, but blends need shared fields. Joins combine sources without needing standard fields, Data blending is the merging of data from various sources into a single dataset for downstream analytics or to be stored in a data warehouse. Data blending tools help combine data and mostly, they require preparation and standardization before the data can be blended together.Data blending can speed up the consumption of that data without involving data scientists or other specialists. When you blend data from multiple sources, you can get a deeper view and reveal important insights. Data blending tools can give non-technical users rapid results in areas like sales, marketing or finance.blend two tables in Tableau Options to combine data.
Steps for blending data.
Understand primary and secondary data sources.
Work across blended data sources.
Define blend relationships for blending.
Establish a link.
Multiple links.
Differences between joins and data blending.
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blend data?
Step 1: Create a relationship between the primary and secondary data sources.
Step 2: Bring summary data from the secondary data source into the primary data source.
Step 3: Compare primary data source data to summary data of secondary data source. difference between join and blending data?
Unlike an ordinary join, which combines data sources at the lowest granularity before any aggregation is done, a data blend can join data sources after aggregation is performed on the individual sources; ultimately limiting the number of records that are joined together and maximizing computational efficiency.What are the limitations of data blending in Tableau?
Data blending limitations often occur when working with “non-additive aggregates” like MEDIAN, RAWSQLAGG, and COUNTD. “Non-additive aggregates are aggregate functions that produce results that cannot be aggregated along a dimension,” says Tableau. “Instead, the values have to be calculated individually.Data blending is the process of combining data from multiple sources into a functioning dataset. This process is gaining attention among analysts and analytic companies because it is a quick and straightforward method used to extract value from multiple data sources.Blending is a method used to help children learn to read by combining different sounds, also known as phonemes, to form words. Blending sounds together teaches learners how words are sounded out, which will help them to decode long and unfamiliar words when they're reading.Data Blending in Tableau enables users to add a secondary data source to the primary data source and displays them together.
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