intersect

I need an JPA/SQL expert: EXISTS query on an Inner Join returns wrong result

ぐ巨炮叔叔 提交于 2020-03-25 16:07:40
问题 I have three tables and want to: Select all students from the first table, that have at least one connection to the school in district '999' in the second table and at least one connection to the teacher with social_number '101' and at least one to the teacher with number '103' in the third table. The tables are connected through the second table. I created an online sql compiler to show the problem: http://tpcg.io/FIoO79xi This query works fine and as expected, until I add the third EXISTS

es6 Set和map数据结构

核能气质少年 提交于 2020-03-01 21:16:25
set set构造函数创造类似数组的数据,set数据结构的数据没有重复的值 let ary = [1,2,3,4,4,4,4]; let setData = new Set(); ary.forEach((p) => { setData.add(p) }) console.log(setData) // [1,2,3,4] set函数接受一个数组(或者是具有iterable接口的数据类型)作为参数,用来初始化 let setData = new Set([1,2,3,4,4,4,4]); // [1,2,3,4] let setDiv = new Set(document.getElementsByTagName('div')) Set 加入值的时候,不会发生类型转换,例如5和‘5’是不同的值,NaN和NaN相等的,见代码 let ary = [NaN,NaN,NaN,5,'5',{},{}] let setData = new Set(ary);// [NaN,5,'5',{},{}] set实例的属性和方法 属性 Set.prototype.constructor:构造函数,默认就是Set函数。 Set.prototype.size:返回Set实例的成员总数。 方法 add(),向该set数据中加目标值,返回该set has(),判断该set是否包含目标值,返回布尔值

查找两个嵌套列表的交集?

一个人想着一个人 提交于 2020-02-27 01:07:21
我知道如何得到两个平面列表的交集: b1 = [1,2,3,4,5,9,11,15] b2 = [4,5,6,7,8] b3 = [val for val in b1 if val in b2] 要么 def intersect(a, b): return list(set(a) & set(b)) print intersect(b1, b2) 但是当我必须找到嵌套列表的交集时,我的问题就开始了: c1 = [1, 6, 7, 10, 13, 28, 32, 41, 58, 63] c2 = [[13, 17, 18, 21, 32], [7, 11, 13, 14, 28], [1, 5, 6, 8, 15, 16]] 最后,我希望收到: c3 = [[13,32],[7,13,28],[1,6]] 你们能帮我这个忙吗? 有关 在python中展平浅表 #1楼 我不知道我是否迟于回答你的问题。 阅读完您的问题后,我想到了一个可在列表和嵌套列表上使用的函数intersect()。 我使用递归来定义此功能,这非常直观。 希望它是您要寻找的: def intersect(a, b): result=[] for i in b: if isinstance(i,list): result.append(intersect(a,i)) else: if i in a: result

Force MySQL to use two indexes on a Join

流过昼夜 提交于 2020-01-31 03:20:10
问题 I am trying to force MySQL to use two indexes. I am joining a table and I want to utilize the cross between the two indexes. The specific term is Using intersect and here is a link to MySQL documentation: http://dev.mysql.com/doc/refman/5.0/en/index-merge-optimization.html Is there any way to force this implementation? My query was using it (and it sped stuff up), but now for whatever reason it has stopped. Here is the JOIN I want to do this on. The two indexes I want the query to use are scs

Trying to run a worksheet change event twice

柔情痞子 提交于 2020-01-30 06:25:39
问题 I am trying to run this worksheet change event for two different columns(A) and (I)... Private Sub Worksheet_Change(ByVal Target As Range) Dim A As Range, B As Range, Inte As Range, r As Range Set A = Range("A:A") Set Inte = Intersect(A, Target) If Inte Is Nothing Then Exit Sub Application.EnableEvents = False For Each r In Inte r.Offset(0, 1).Value = Date Next r Application.EnableEvents = True End Sub This event is something i found on this forum. Its purpose is to make it so whenever data

Multiple SQL SELECT WHERE with INTERSECT, placeholder value

ぐ巨炮叔叔 提交于 2020-01-24 22:08:21
问题 I'm using SQL Server and am trying to do the following: SELECT dword FROM Details WHERE dskey = '51a' INTERSECT SELECT dword FROM Details WHERE dskey = '52b' INTERSECT SELECT dword FROM Details WHERE dskey = '53i' INTERSECT SELECT dword FROM Details WHERE dskey = '54d' INTERSECT SELECT dword FROM Details WHERE dskey = '55e'; This works fine. However, I need to build a generic SELECT like: SELECT dword FROM Details WHERE dskey = value1 INTERSECT SELECT dword FROM Details WHERE dskey = value2

Multiple SQL SELECT WHERE with INTERSECT, placeholder value

吃可爱长大的小学妹 提交于 2020-01-24 22:08:17
问题 I'm using SQL Server and am trying to do the following: SELECT dword FROM Details WHERE dskey = '51a' INTERSECT SELECT dword FROM Details WHERE dskey = '52b' INTERSECT SELECT dword FROM Details WHERE dskey = '53i' INTERSECT SELECT dword FROM Details WHERE dskey = '54d' INTERSECT SELECT dword FROM Details WHERE dskey = '55e'; This works fine. However, I need to build a generic SELECT like: SELECT dword FROM Details WHERE dskey = value1 INTERSECT SELECT dword FROM Details WHERE dskey = value2

Turtle line intersection, coordinates

被刻印的时光 ゝ 提交于 2020-01-17 05:20:11
问题 I need to make a small program that draws three circles, a line between the first two, and then determines if the third touches or intersects the line. I have done everything but the last part. I am trying to use the points to determine if the area is 0, which would mean that the third point is, in fact, intersecting the line. Right? Or I could use another way. Technically the third circle can be within 3 pixels of the line. The problem is near the bottom at the hashtag. I would appreciate

Query based on common criteria from two tables and sort based on number of occurrences

雨燕双飞 提交于 2020-01-17 01:36:07
问题 I have the following tables that I need to run query against each. userA id name title ---------- ---------- -------- 1 john engineer 1 John engineer 2 mike designer 3 laura manager 4 dave engineer userB id name title ---------- ---------- -------- 1 john engineer 3 laura manager 3 laura manager 3 laura Manager 5 Peter sales 4 Dave engineer and I'm using the following query to to grep the names found in both tables (intersected) and sorted based on the number of occurrences found: select id,

overlap(intersect) time interval and xts

自闭症网瘾萝莉.ら 提交于 2020-01-15 09:36:07
问题 There's two time datasets: data from raincollector -- time interval ti with start , end and rain p (total amount of rain per period in mm) ti <- data.frame( start = c("2017-06-05 19:30:00", "2017-06-06 12:00:00"), end = c("2017-06-05 23:30:00", "2017-06-06 14:00:00"), p = c(16.4, 4.4) ) ti[,1] <- as.POSIXct(ti[, 1]) ti[,2] <- as.POSIXct(ti[, 2]) and timeseries ts from gauging station with time and parameter q , which is the water discharge (cu. m per sec) ts <- data.frame(stringsAsFactors