row-number

问题 I have the following data: type id date1 date2 diff ----------------------------------- blue 1 x1 xxx 18 blue 1 x2 - - red 1 x1 - - blue 2 x1 xx 15 blue 2 x2 xx 18 blue 2 x3 - - And I want to add a row_number to get the data like this: type id date1 date2 diff row_number --------------------------------------------- blue 1 x1 xxx 18 1 blue 1 x2 - - 2 red 1 x1 - - 1 blue 2 x1 xx 15 1 blue 2 x2 xx 18 2 blue 2 x3 - - 3 I.e. first sort by type, then id and last date. I have tried the following

问题 Output: https://www.dropbox.com/s/q9bjrzndbzj0l2i/test3.PNG?dl=0 How do I incorporate a query into the current code if I want to get only the Position (row_number) = 3 if lets say the Stud_ID = 4? SET @row_num = 0; SELECT @row_num := @row_num + 1 as Position, s.* FROM ( SELECT Student.Stud_ID, Student.Stud_Name, Student.Stud_Class, SUM(Grade.Percentage) AS Points FROM Student, Student_Subject, Grade WHERE Student.Stud_ID = Student_Subject.Stud_ID AND Student_Subject.Stud_Subj_ID = Grade.Stud

问题 I have tried the following query in Microsoft SQL Server Management Studio: select ROW_NUMBER() OVER(ORDER BY ret_id, dep_id DESC) AS 'Row Number' from Round_Trip_View and it works. I have tried the same to create a view, and it crashed. Any idea? I am looking to assign a kind of id for each row in my view and I appreciate any alternative ideas :) 回答1: The problem was the view wizard. What I learned: never use the wizards when you can code! :) 来源： https://stackoverflow.com/questions/13280520

问题 I have got a requirement where I have to create a listView which adds item number with each item. I have got an idea of putting a number in model of item but I am unable to figure that out. 回答1: The easiest way should be to add one additional property Index to the ViewModel that is bound to the the ListView.ItemsSource and then simply represent it on the screen. Alternatively, if there is a need to use an enumerated ListView multiple times you could create a reusable control and move the

问题 Can I do row_number without partition? (see data at end of post) I can use this statement to get an ORDER#. ROW_NUMBER() OVER (PARTITION BY LOG_ID ORDER BY ORDER_ID) Any suggestions to get the LOG# ? -LOG# ORDER# LOG_ID ORDER_ID -1 1 340580 387373215 -1 2 340580 387373225 -2 1 340925 387812330 -3 1 340935 388093450 -4 1 340945 387615845 -5 1 340990 386433405 -6 1 341675 376247120 -6 2 341675 376247130 -6 3 341675 388352445 回答1: SELECT - DENSE_RANK() OVER (ORDER BY LOG_ID) AS "#LOG", ROW

问题 I am new to Postgresql. I have a table called 'sales'. create table sales ( cust varchar(20), prod varchar(20), day integer, month integer, year integer, state char(2), quant integer ) insert into sales values ('Bloom', 'Pepsi', 2, 12, 2001, 'NY', 4232); insert into sales values ('Knuth', 'Bread', 23, 5, 2005, 'PA', 4167); insert into sales values ('Emily', 'Pepsi', 22, 1, 2006, 'CT', 4404); insert into sales values ('Emily', 'Fruits', 11, 1, 2000, 'NJ', 4369); insert into sales values (

问题 I find this behaviour very strange and counterintuitive. (Even for SQL). set ansi_nulls off go ;with sampledata(Value, CanBeNull) as ( select 1, 1 union select 2, 2 union select 3, null union select 4, null union select 5, null union select 6, null ) select ROW_NUMBER() over(partition by CanBeNull order by value) 'RowNumber',* from sampledata Which returns 1 3 NULL 2 4 NULL 3 5 NULL 4 6 NULL 1 1 1 1 2 2 Which means that all of the nulls are being treated as part of the same group for the

问题 I have to migrate a sql to work on Microsoft SQL Server 2000. Unfortunately the current sql uses the function ROW_NUMBER() which is not yet supported in this version. Therefore I have to find something similar. Below my SQL (I used * instead of listing all columns) SELECT [Id], ROW_NUMBER() OVER (ORDER BY InstallmentNumber, ID ASC) AS ROWID FROM [ARAS].[ARAS].[Movement] 回答1: Using a temp table with an identity column to simulate the ROW_NUMBER may be your best bet performance wise: CREATE

问题 I have a mysql table need to display the data along with the row number in front end aplication. The following query works perfectly in phpMyadmin SET @row_num=0; SELECT (@row_num:=@row_num+1) AS num,INV,DOS,PTNAME,BAL,PROV from sheet; But when i use the same code in php projects it is returning the following error Warning: mysql_fetch_array(): supplied argument is not a valid MySQL Below is my code: <?php $conn = mysql_connect("localhost","root",""); mysql_select_db("omega",$conn); $sel="SET

问题 How can i set value of column that has been added after altering table equal to row no in sql server 2008. That is i want value of the column equal to no. of row. I also want this field to allow NULL values. So it is like auto increment but allowing null values that's why don't want to use identity or primary key column with auto increment. So how can it be set to row no? Any help will be appreciated. 回答1: If you try to UPDATE a column directly using ROW_NUMBER() you'll get... Windowed