change-tracking

问题 We are running SQL 2008 R2 and have started exploring change tracking as our method for identifying changes to export to our data warehouse. We are only interested in specific columns. We are identifying the changes on a replicated copy of the source database. If we query the change table on the source server, any specific column update is available and the SYS_CHANGE_COLUMNS is populated. However on the replicated copy the changes are being tracked but the SYS_CHANGE_COLUMNS field is always

问题 We are running SQL 2008 R2 and have started exploring change tracking as our method for identifying changes to export to our data warehouse. We are only interested in specific columns. We are identifying the changes on a replicated copy of the source database. If we query the change table on the source server, any specific column update is available and the SYS_CHANGE_COLUMNS is populated. However on the replicated copy the changes are being tracked but the SYS_CHANGE_COLUMNS field is always

问题 I have a dataset that tracked the numerical changes in different types of objects over time. So I have columns for ID, measurement, yearmonth, and change. The change column has TRUE values for a change that happened compared to its previous value. anything constant before and after that value is marked as FALSE unless another change happens. I want to be able to do the following things: be able to set a threshold. So flag any value cases that switched past a specific number. For example, if

问题 I use SQL Server 2012 Standard edition, and I activated Change Tracking function on a table. When I list changes on a table with the CHANGETABLE function, I have a SYS_CHANGE_COLUMNS property with binary data 0x0000000045000000460000004700000048000000 How do I know which columns have changed ? 回答1: Because the column is a bitmask made up of the column IDs of all the columns which were changed, it's difficult to know what it's made up of. In fact, MSDN says not to interrogate SYS_CHANGE

问题 I use SQL Server 2012 Standard edition, and I activated Change Tracking function on a table. When I list changes on a table with the CHANGETABLE function, I have a SYS_CHANGE_COLUMNS property with binary data 0x0000000045000000460000004700000048000000 How do I know which columns have changed ? 回答1: Because the column is a bitmask made up of the column IDs of all the columns which were changed, it's difficult to know what it's made up of. In fact, MSDN says not to interrogate SYS_CHANGE

问题 Let's say I have enabled change tracking on 200 tables in a database. Since the change tracking value change in the scope of database. What if I reach the max value of BIGINT? 回答1: In order to reach bigint limit, you have to change 1 million rows in your database every second during the next 292471 years. Good luck reaching it. 来源： https://stackoverflow.com/questions/26459935/what-happens-to-change-tracking-value-when-it-reaches-bigint-limit

问题 I am in the process of upgrading an application from EF1 to EF4.1 I created a DbContext and a set of POCOs using the "ADO.NET DbContext Generator" templates. When I query the generated DbContext the database part of the query takes 4ms to execute (validated with EF Profiler). And then it takes the context about 40 seconds (in words: FORTY!) to do whatever it does before it returns the result to the application. EF1 handles the same query in less than 2 seconds. Turning off AutoDetectChanges,

问题 I am in the process of upgrading an application from EF1 to EF4.1 I created a DbContext and a set of POCOs using the "ADO.NET DbContext Generator" templates. When I query the generated DbContext the database part of the query takes 4ms to execute (validated with EF Profiler). And then it takes the context about 40 seconds (in words: FORTY!) to do whatever it does before it returns the result to the application. EF1 handles the same query in less than 2 seconds. Turning off AutoDetectChanges,

问题 I made a test with code below to update the Product : var existing = await _productRepository.FirstOrDefaultAsync(c => c.Id == input.Id); if (existing == null) throw new UserFriendlyException(L("ProductNotExist")); var updatedEntity = ObjectMapper.Map<Product>(input); var entity = await _productRepository.UpdateAsync(updatedEntity); But it throws an exception: Mvc.ExceptionHandling.AbpExceptionFilter - The instance of entity type 'Product' cannot be tracked because another instance with the

问题 This question already has answers here : diff a ruby string or array (12 answers) Closed 5 years ago . I am tracking changes in a web-page using Ruby. After I removed all html tags and blank lines, I get an array of lines which needs to be checked for additions/removals assuming that there may be repetitions. Could you recommend a good gem if it has been done already? I could make the array lines unique and then the problem is avoided. But what if I need to track the repeated lines as well