大约有 3,551 项符合查询结果（耗时：0.0262秒） [XML]
Why should I not wrap every block in “try”-“catch”?
... of error handling based on the abstractions - for example, you handle all SQL-related errors in your data access code so that the part of the application that is interacting with domain objects is not exposed to the fact that there is a DB under the hood somewhere.
There are a few related code sme...
How to pass “Null” (a real surname!) to a SOAP web service in ActionScript 3
... improper interpretation of user data (in this case, the string "Null") in SQL queries in various languages, including ColdFusion.
It is not clear from the question that this is the source of the problem, and given the solution noted in a comment to the first answer (embedding the parameters in a s...
mongodb/mongoose findMany - find all documents with IDs listed in array
... means you can use the handy mongoDB $in clause, which works just like the SQL version of the same.
model.find({
'_id': { $in: [
mongoose.Types.ObjectId('4ed3ede8844f0f351100000c'),
mongoose.Types.ObjectId('4ed3f117a844e0471100000d'),
mongoose.Types.ObjectId('4ed3f18132...
What's wrong with foreign keys?
...son why app developers don't use object database management systems (aka NoSQL databases!) more widely is because of the investment in RDBMSs. Most of the time the database (not the database management system) is a mid-tier object model often involving distributed caches. This is where deletion casc...
Querying DynamoDB by date
...t be the best way of doing it but for someone used to RD (I'm also used to SQL) it's the fastest way to get productive. Since there is no constraints in regards to schema, you can whip up something that works and once you have the bandwidth to work on the most efficient way, you can change things ar...
Differences between Microsoft .NET 4.0 full Framework and Client Profile
...)
Entity Framework
Windows Workflow Foundation
Speech
XSLT support
LINQ to SQL
Runtime design libraries for Entity Framework and WCF Data Services
Managed Extensibility Framework (MEF)
Dynamic types
Parallel-programming features, such as Task Parallel Library (TPL), Parallel LINQ (PLINQ), and Coord...
Surrogate vs. natural/business keys [closed]
... that makes surrogate keys simply awful to handle.
– SQL Police
Feb 19 '16 at 22:58
...
Combining two expressions (Expression)
...rsion works like a charm, I used And instead of andalso, I thought linq to sql doesn't support andalso?
– Maslow
Sep 4 '09 at 13:57
2
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Visual Studio Post Build Event - Copy to Relative Directory Location
...ou some idea. I have recently been doing build scripts, that even execute SQL code as part of the build. If you would like some more help or even some sample build scripts, let me know, but if it is just a small process you want to run at the end of the build, the perhaps going the full msbuild sc...
MySQL: multiple tables or one table with many columns?
...
Recently I was faced with this same problem, because MySQL InnoDB tables have a relatively small length limit (~8000 bytes). In my problem table (data from very lengthy insurance forms, more than 100 columns) we have multiple varchar columns, all UTF8. So we easily filled the ~80...