
Spring Boot: 'Database Driver: unknown/undefined' Error While ...
2024年12月23日 · Database JDBC URL [Connecting through datasource 'HikariDataSource (HikariPool-3)'] Database driver: undefined/unknown Database version: 9.0.1 Autocommit mode: undefined/unknown Isolation level: undefined/unknown Minimum pool size: undefined/unknown Maximum pool size: undefined/unknown
logging - When to use the different log levels - Stack Overflow
DEBUG – less granular compared to the TRACE level, but still more than you will need in everyday use. The DEBUG log level should be used for information that may be needed for deeper diagnostics and troubleshooting. INFO – the standard log level indicating that something happened, application processed a request, etc. The information logged ...
Oracle SQL connect by level - Stack Overflow
2014年6月2日 · When level <= 2, then you will get each level 1 time (for level 1) + the number of records in the table (That means for this condition 2 records having level 1 + 2*2 records having level 2. This is the reason you are getting 6 records.)
log4j logging hierarchy order - Stack Overflow
2011年10月12日 · In Summary WARN level is used to log warning message for logging in Java. ERROR is the more restricted java logging level than WARN and used to log Errors and Exception, you can also setup alert on this java logging level and alert monitoring team to react on this messages. ERROR is serious for logging in Java and you should always print it.
How to solve 'invalid object name' in SQL Server?
2017年3月23日 · Currently learning SQL server machine learning service and I had the same issue where database table pulls from one level below but the FROM where the location was different than finding a current location. So I wrote exactly FROM where data was coming: FROM [WideWorldImporters].[Application].[Cities_Archive] Hope this could help at initial level
python - Rename Pandas DataFrame Index - Stack Overflow
2022年2月2日 · You want to rename to index level's name: df.index.names = ['Date'] A good way to think about this is that columns and index are the same type of object (Index or MultiIndex), and you can interchange the two via transpose. This is a little bit confusing since the index names have a similar meaning to columns, so here are some more examples:
How to import a Python class that is in a directory above?
2009年6月28日 · Now, if top_level_file.py looks like this: x = 1 Then I can import it from subfile.py, or really any other file anywhere else on your computer. # subfile.py OR some_other_python_file_somewhere_else.py import random # This is a standard package that can be imported anywhere. import top_level_file # Now, top_level_file.py works similarly.
EF LINQ include multiple and nested entities - Stack Overflow
2013年4月2日 · Ok, I have tri-leveled entities with the following hierarchy: Course -> Module -> Chapter Here was the original EF LINQ statement: Course course = db.Courses .Include(i => i.Mo...
How do you properly use namespaces in C++? - Stack Overflow
2014年5月23日 · One advantage of "using namespace" at the function level as you suggest rather than at the .cpp file level or namespace {} block level within the .cpp is that it helps greatly with single-compilation-unit builds. "using namespace" is transitive, and applies for namespace A across discrete namespace A {} blocks in the same unit, so for single ...
How to avoid the "divide by zero" error in SQL?
2009年5月14日 · So Edwardo asks in the comments "what if the user puts in a 0?", and he advocates that it should be okay to get a 0 in return. If the user puts zero in the amount, and you want 0 returned when they do that, then you should put in code at the business rules level to catch that value and return 0...not have some special case where division by 0 = 0.