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delegate keyword vs. lambda notation
...with delegates (such as System.Func) uses System.Linq.Enumerable. Linq to SQL (and anything else) with expressions uses System.Linq.Queryable. Check out the parameters on those methods.
An Explanation from ScottGu. In a nutshell, Linq in-memory will produce some anonymous methods to resolve your ...
Why is LINQ JOIN so much faster than linking with WHERE?
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Your first approach (SQL query in the DB) is quite efficient because the DB knows how to perform a join. But it doesn't really make sense to compare it with the other approaches, since they work directly in memory (Linq to DataSet)
The query with...
How can I escape square brackets in a LIKE clause?
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I corrected the other part of the answer too. SQL Fiddle with before and after versions
– Martin Smith
Oct 31 '12 at 22:20
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ORA-30926: unable to get a stable set of rows in the source tables
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and watch for .trc files in UDUMP when it occurs.
2) Having found the SQL statement, check if it is correct (perhaps using explain plan or tkprof to check the query execution plan) and analyze or compute statistics on the tables concerned if this has not recently been done. Rebuilding (or dropp...
linux svn搭建配置及svn命令详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...务器可以运行多个svnserver
好了，启动成功后,就可以使用了。
建议采用TortoiseSVN， 连接地址为: svn://your server address （如果指定端口需要添加端口 :端口号）
连接后可以上传本地的文件，有效的管理你的代码。
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Data access object (DAO) in Java
... have to provide a concrete implementation for that interface to deal with SQL server, and another to deal with flat files, etc.
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T-SQL - function with default parameters
... answered Dec 2 '11 at 15:11
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Simplest way to do a recursive self-join?
What is the simplest way of doing a recursive self-join in SQL Server? I have a table like this:
5 Answers
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Add a column to a table, if it does not already exist
I want to write a query for MS SQL Server that adds a column into a table. But I don't want any error display, when I run/execute the following query.
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Find nearest latitude/longitude with an SQL query
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Google's solution:
Creating the Table
When you create the MySQL table, you want to pay particular attention to the lat and lng attributes. With the current zoom capabilities of Google Maps, you should only need 6 digits of precision after the decimal. To keep the storage space require...