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It is not possible to directly apply filters using subqueries and exists, for example: You must apply filters for a substring statement by first annotating Sequence Set and then applying filters for this annotation:
You can use an aggregate within a sub-query, but it requires a certain set of filter(), values(), and annotate() to correctly group the sub-query.
Since in this case the sub-query has to be restricted to a singular colum, lighting < values('total') is necessary ×. It is the only way to make an Aggregation within a sub-query, because using aggregate() tries to analyze the query set (and if there is an OuterRef, this is not possible).
Occasionally, you cannot use phrases from a WHERE statement to describe a WHERE statement. This additional reference may not be transferable to different databases (because you are typing SQL directly ) and may be against the DRY principles, so you should try to prevent it.
In the last few month before the GDPR began, there were a few arguments in favour of block chain specific treatments, on the grounds that this commercial novelty was so important and had such great promise that the EU should definitely consider work-arounds for them as well. Understandably, companies don't start working to the last minute - but how did block-chain folks overlook such an existence threatening situation for two years?
GDPR is anti-matter for many use cases of the block chain - in particular for those who initially proceed from a full monitoring panic. However - what brings you a blocking chain that you don't get with a perfect common databases like IBM has been selling for the way of managing the personality information of individuals for a hundred years or more?
Every aggregate of information containing PII - an even broader set than PII - must be revisable. An approved block-chain does not offer any new assurances of completeness instead of just placing a simple memory in a tamper-proof Merkle file. Those who control the authorizations control the databank - and bear the resposibility for GDPR.
None of the companies wants the sentence "Cambridge Analytica, but on the blockchain" next to his name. The handling with the GDPR is not annoying - unless, your buisness paradigm consists in abusing person-related dates of persons.... or you were stupid enough to take up person-related dates in a pure appendix book. But just to affirm the apparent - DO NOT insert ANY ONLY INDIVIDUAL DATES IN AN ADDITIONAL LED.
They wouldn't be checking into a git repository to get your personally identifiable information and expected it to be simple to edit - have you ever had to delete a binary bloc from a git repo - so don't even think about doing it with a block chain. Everyone who tries to resell you a block chain for your personally identifiable information is a quack and certainly earns his way by destroying his own buisness as well.