rank

问题 I have a pivot table that pulls a rate by person from powerpivot. The rate is a calculated field, not a column and I need the Grand Total to show as a SUM of the rates, not an average. This is purely for ranking purposes to show who has the highest overall rates to lowest. This is what it looks like with the field I want: Person Jan-2018 Feb-2018 Mar-2018 GrandTotal [DesiredField] A 80% 71% 82% 77.6% 233% B 76% [blank] 85% 80.5% 161% C 82% 85% 79% 82% 246% So person C would be at the top

问题 I have a stored procedure that pulls data for a SS Report. I need to include a Row Number column but I have never used RANK before and I'm gettig this error: Column 'WL.SSN' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.. Can anyone help me with the syntax? Here is what I have so far. SELECT WL.SSN, WL.LastName, WL.FirstName, WL.AddressLine1, WL.AddressLine2, WL.AddressLine3, WL.City, WL.State, WL.ZipCode, WL.Plus4, S

问题 Inspired by this question I decided to test the rank() function, trying to see if sub query's are less efficient than rank. So I created a table: create table teste_rank ( codigo number(7), data_mov date, valor number(14,2) ); alter table teste_rank add constraint tst_rnk_pk primary key ( codigo, data_mov ); and inserted some records... declare vdata date; begin dbms_random.initialize(120401); vdata := to_date('04011997','DDMMYYYY'); for reg in 1 .. 465 loop vdata := to_date('04011997',

问题 I am facing the problem of sort Lucene results based on user click log. I would like that more accessed results comes first. Does anyone knows how to configure or implement such property in Lucene or Solr? Thank you very much. 回答1: You can declare a sortable integer field (let's call it clickNum) in your schema, setting it to zero by default for each indexed document. When a user opens a document your app triggers an update of clickNum field by setting clickNum = clickNum + 1. At query-side

问题 I want to rank values column-wise. I have the following dataframe: dput(test) structure(list(Name = c("A", "B", "C", "D"), Margin = c(744, 3196.4722, 0, 394), T1 = c(420, 200, 2150, 70), T2 = c(630, 285, 2365, 84), T3 = c(630, 335, 2580, 105), T4 = c(666, 410, 2795, 128), T5 = c(2244, 2961.7931, 3010, 142), T6 = c(2244, 3652.472, 3440, 151), T7 = c(2244, 3722.472, 3870, 168), T8 = c(2244, 3887.472, 5160, 187), T9 = c(2244, 4112.472, 6450, 225), T10 = c(2244, 4337.472, 6450, 225), T11 = c(798,

问题 If I have a table like this: Id Rnk 1 1 1 1 1 2 1 2 and I want to arrange the table like that: Id Rnk 1 1 1 2 1 1 1 2 And I want it to be fixed so when ever I'll select the table the order will be like this. Any Help on how can I do it? 回答1: And I want it to be fixed so when ever I'll select the table the order will be like this. Quick answer: it cannot be done. You have to always use ORDER BY clause in the query if you want to get rows in desired order. A few related questions and answers on

问题 I have a website where users can rate comments that are left on pages. Each comment has a unique ID (E.g. 402934) If I want users to be able to thumb-up/thumb-down said comments I can see how I would make a simple counter code to keep track of the number of thumb-ups vs thumb-downs but how can I make sure that each user only ranks said comment once. I was going to make a database with each comment number as a row and in that row having an array of all the users that have ranked it thumbs up

问题 Matlab has a built-in function for calculating rank of a matrix with decimal numbers as well as finite field numbers. However if I am not wrong they calculate only the lowest rank (least of row rank and column rank). I would like to calculate only the row rank, i.e. find the number of independent rows of a matrix (finite field in my case). Is there a function or way to do this? 回答1: In linear algebra the column rank and the row rank are always equal (see proof), so just use rank (if you're

问题 I have a table called standings which has points, goal difference and goals scored by each team. Here's the table structure and the data. CREATE TABLE standings ( team_id int(3) unsigned NOT NULL AUTO_INCREMENT, points int(2) unsigned DEFAULT 0, goal_difference int(2) unsigned DEFAULT 0, goals_for int(2) unsigned DEFAULT 0, PRIMARY KEY (team_id) ) ENGINE=InnoDB AUTO_INCREMENT=0 DEFAULT CHARSET=latin1; insert into standings(team_id,points,goal_difference,goals_for) values (1,20,2,17); insert

问题 what are the differences between roulette wheel selection and rank based selection in genetic algorithm. i am confused which one is best for me now. that's why just want to know the differences. 回答1: The Rank Based Selection algorithm assigns probability(of them getting selected) to the items according to the priority they have. For example, the least priority item might get 10%, the one above that 20% and so on. In other words, the probability of an item getting selected is modified, and is