scd

问题 I am building a .NET application for inserting data (an Excel add-in in fact), and I want to use an ORM for inserting data with automated versioning . Here's a worked example: User "John Doe" does the first data insertion (4 data points as per below example) At a later time, user "Albert" opens the interface, modifies one data point, and saves All 4 data points are processed; ORM flags the modified data as non-Current, adds the new data, updates version counter, changes validity dates columns

问题 I am building a .NET application for inserting data (an Excel add-in in fact), and I want to use an ORM for inserting data with automated versioning . Here's a worked example: User "John Doe" does the first data insertion (4 data points as per below example) At a later time, user "Albert" opens the interface, modifies one data point, and saves All 4 data points are processed; ORM flags the modified data as non-Current, adds the new data, updates version counter, changes validity dates columns

问题 I am building a .NET application for inserting data (an Excel add-in in fact), and I want to use an ORM for inserting data with automated versioning . Here's a worked example: User "John Doe" does the first data insertion (4 data points as per below example) At a later time, user "Albert" opens the interface, modifies one data point, and saves All 4 data points are processed; ORM flags the modified data as non-Current, adds the new data, updates version counter, changes validity dates columns

问题 I am building a .NET application for inserting data (an Excel add-in in fact), and I want to use an ORM for inserting data with automated versioning . Here's a worked example: User "John Doe" does the first data insertion (4 data points as per below example) At a later time, user "Albert" opens the interface, modifies one data point, and saves All 4 data points are processed; ORM flags the modified data as non-Current, adds the new data, updates version counter, changes validity dates columns

问题 I want to run SCD queries on a schema. The docs indicates that there is experimental support, but I don't see anything in the javadoc. Anyone know how it's supposed to work? 回答1: Checkout this wrapper on xerces. It can locate the paths as well as generate them. 来源： https://stackoverflow.com/questions/8581594/how-to-use-schema-component-designators-in-xerces-for-java

问题 I am designing a few dimensions with multiple data sources and wonder what other people have done to align the multiple business keys per data source. My Example: I have 2 data sources - the Ordering System and the Execution System. The Ordering system has details about payment and what should happen; the Execution System has details on what actually happened (how long it took etc, who executed on the order). Data from both systems is need to created a single fact. In both the Ordering and

问题 I am working on a data warehouse project that will involve integrating data from multiple source systems. I have set up an SSIS package that populates the customer dimension and uses the slowly changing dimension tool to keep track of updates to the customer. I'm running into some issues. Take this example: Source system A might have a record like that looks like this: First Name, Last Name, Zipcode Jane, Doe, 14222 Source system B might have a record for the same client that looks like this:

问题 I am trying to understand pure type 6 SCD implementation from WIKI which says mainly three points Having a Type 2 surrogate key for each time slice can cause problems if the dimension is subject to change. A pure Type 6 implementation does not use this, but uses a Surrogate Key for each master data item (e.g. each unique supplier has a single surrogate key). This avoids any changes in the master data having an impact on the existing transaction data. However I am unable to visualize these

问题 As an example, let's say I have a fact table with two dimensions and one measure FactMoney table ProjectKey int PersonKey int CashAmount money The two dimensions are defined like this: DimProject (a type 0 dimension - i.e. static) ProjectKey int ProjectName varchar(50) DimPerson (a type 2 slowly changing dimension) PersonKey int PersonNaturalKey int PersonName varchar(50) EffectiveStartDate datetime EffectiveEndDate datetime IsCurrent bit Pretty straightforward so far. Now I'll introduce a

问题 I am working on an application that uses XJC to generate Java POJOs from XSDs. There are dozens of schemas, and that number will grow. The application also needs to be able to handle different versions of the same schema, which means that I will have multiple schemas defining common types. I am trying to customize the bindings so that certain core types implement a common interface. The Inheritance plugin of JAXB2 Basics seems to do what I need, but I can't seem to nail the right syntax. Here