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Distinct() with lambda?
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@sudhAnsu63 this is a limitation of LinqToSql (and other linq providers). The intent of LinqToX is to translate your C# lambda expression into the native context of X. That is, LinqToSql converts your C# into SQL and executes that command natively wherever possible. ...
MFC CListCtrl使用方法详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
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}
*pResult = 0;
}
16. item切换焦点时(包括用键盘和鼠标切换item时)，状态的一些变化顺序
添加listctrl控件的LVN_ITEMCHANGED消息相应函数
void CTest6Dlg::OnItemchangedList1(NMHDR* pNMHDR, LRESULT* pResult)
{
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Return anonymous type results?
... what is the best way to return results from multiple tables using Linq to SQL?
16 Answers
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Delete/Reset all entries in Core Data?
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You can delete the SQLite file - but I choose to do it by purging the tables individually with a functions:
- (void) deleteAllObjects: (NSString *) entityDescription {
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEn...
How do I specify the Linq OrderBy argument dynamically?
...comes to Linq expressions interpreted by providers, like Entity Framework (sql server, or other ) ??
– a.boussema
Apr 14 '13 at 19:03
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What is the function of the DBMDL File in VS database project
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When creating a new SQL 2008 Database Project VisualSVN automatically elects not to check this file in so that also suggests to me that it's not a good idea to check it in to source control.
– rohancragg
No...
How to use mysql JOIN without ON condition?
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MySQL documentation covers this topic.
Here is a synopsis. When using join or inner join, the on condition is optional. This is different from the ANSI standard and different from almost any other database. The effect is a ...
Unique Key constraints for multiple columns in Entity Framework
...Columns");
EF 6 and below:
First approach:
dbContext.Database.ExecuteSqlCommand(string.Format(
@"CREATE UNIQUE INDEX LX_{0} ON {0} ({1})",
"Entitys", "FirstColumn, SecondColumn"));
This approach is very fast and useful but the main pr...
Setting up foreign keys in phpMyAdmin?
...in lets you define foreign keys using their "relations" view. But since, MySQL only supports foreign constraints on "INNO DB" tables, the first step is to make sure the tables you are using are of that type.
To setup a foreign key so that the PID column in a table named CHILD references the ID colu...
What is the syntax for “not equal” in SQLite?
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@ban-geoengineering <> is SQL Ansi standard and != is not. Of course <> is more professional
– edc65
Jan 29 '18 at 21:49
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