BI tools rollup the measures, so we keep the measures additive if possible. For example, we won't pre-calculate and keep the KPI "Unit per Transaction (UPT)" in single measure column as a ratio. Instead, we keep two measures, "Number of Units" and "Number of Transactions".
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Extract: Performance Tips
Below listed some common performance tips for extract queries. Extract required columns only and specify in the query, avoid select * Extrac...
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Factless fact table is the fact table which log an business event but does not contain any measure fields. Typical use cases are the attenda...
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Transactional Fact and Snapshot Fact tables are usually designed from the corresponding individual business process. Consolidated Fact table...
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NULL columns sometime give unexpected query results to users in user point of view. It happens in filtering (i.e. condition [COLUMN1 = 0 or...
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