Hello, This is a temporary solution: var query = new SimpleDatabase().Users.Where(u => u.Name.Contains(search) ).OrderBy(u => u.Id).GroupBy(u => u.Id).Select(u => u.FirstOrDefault() ); Again, a temporary solution!!!
In this example, Purchases contains purchases for the week of August 21, 2006. FactBuyingHabits contains purchases for the prior week; ordinarily this table would be populated with rows dating back much earlier. Transact-SQL Copy USE AdventureWorks2008R2; GO IF OBJECT_ID (N'dbo.Purchases', N...
Using where has no direct counterpart in JSON-formatted output; the attached_condition property contains any WHERE condition used. where 子句用于限制与下一个表匹配的行记录或发送到客户端的行记录。除非您特意打算从表中提取或检查所有行,否则如果Extra值不是Using where并且表连接类型为ALL或index,则查询可能...
Hello guys, if you are doing a code review and see a SELECT * in production code, would you allow it? Well, its not a simple question as it looks like but let's find out pros and cons about using SELECT * in a production SQL query and then decide. I have read many articles on...
Notice that the preceding CATCH block code contains a ROLLBACK. The reason is that even though the deadlock error is trapped, the transaction isn't rolled back. The transaction is still doomed, but now it's your responsibility to roll it back within the TRY/CATCH. So what's different?
sp_executesql. This allows TRY…CATCH to catch the error at a higher level of execution than the error occurrence. For example, the following code shows a stored procedure that generates an object name resolution error. The batch that contains the TRY…CATCH construct is executing at a higher...
A recursive CTE can greatly simplify the code required to run a recursive query within a SELECT, INSERT, UPDATE, DELETE, or CREATE VIEW statement. In earlier versions of SQL Server, a recursive query usually requires using temporary tables, cursors, and logic to control the flow of the recurs...
SQL Server 2005 Data Mining Data mining is a technology that enables you to uncover patterns in your data. Detecting relationships between the categories and the text in the Web feedback is a basic data mining task. For instance, if a piece of feedback contains the words "...
Retrieve data from the Oracle data source by using an SQL query. When you select this option, enter a query in one of the following ways: Enter the text of the SQL query inSQL command. ClickBrowseto load the SQL query from a text file. ...
4.2.1Query Builder Home Page Learn about Query Builder home page. The Query Builder page is divided into three sections: Object Selection panedisplays on the left side of the page and contains a list objects from which you can build queries. Only objects in the current schema display. ...