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Questions tagged [lead]

Accesses data from a subsequent row in the same result set without the use of a self-join in SQL Server 2017. LEAD provides access to a row at a given physical offset that follows the current row. Use this analytic function in a SELECT statement to compare values in the current row with values in a following row.

For further reading https://learn.microsoft.com/en-us/sql/t-sql/functions/lead-transact-sql

309 questions
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Selecting record based on dates

I have a sample source table here and currently, it is returning multiple records due to multiple tutors. I want to select only the tutor_name if the exam_date is between the effective date and the next record's effective date. Sample desired…
JamesBowery
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Lag Function vs Next Function in Quantmod / R

The Lag function in quantmod can accept a vector for its "k" periods to lag (and output a matrix or array), but I can find no corresponding way to accomplish such through a forward-looking function - like Next() or lead(). For example, variable…
cpanagakos
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The lead function in the R package dplyr is not working for me

library(dplyr) x <- 1:10 lead(x) Running the above code just gives me the following error: "Error in UseMethod("lead") : no applicable method for 'lead' applied to an object of class "c('integer', 'numeric')"" I have tried a bunch of things like…
Muhammad Kamil
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R How to use next row for same column calculation

I've been trying to replicate some basic Excel calculations in R but I can't find the right solution for this one. I want to create a new column of a data.frame but the values being calculated should be based on the next values of the same column,…
David
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Why Some Bootstrap Class and CSS property is not working in my code?

Here I wanted to make a website template through BOOTSTRAP and CSS.But in my code some bootstrap class is not working like lead,font-weight,color,bg-color etc.If I use some bootstrap text-color in a section than when I use some other color in css in…
user15220138
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Only show a Row if a certain attribute changes .Is it LAG or LEAD function?

As the title says i want to display only rows where we see that the attribute "Value" changes compared to previous rows SELECT * FROM Therapy WHERE Therapy.DataTypeId = @PumpTherapyDataType AND Therapy.ConsultId = 5 …
JohnnyJoe
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Splitting a value in to current date and next date with SQL in Big Query

I want to split the sales data of one day up into that specific day and the next day with SQL. In the first table underneath you can see the data I have and in the second table an example of the data I want to have. Table 1: Current situation | …
Jelle Dekker
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hive string to date over lead function

So guys, I have to convert this from PL/SQL (Oracle) into Hive format: NVL(TO_CHAR(TO_DATE(SUBSTR(LEAD(DATE_TIME) OVER (PARTITION BY CU_NO ORDER BY CR_NO ,TO_NUMBER(DATE_TIME)),1,6),'YYMMDD'),'YYYYMMDD'),'99991231') END_DATE I've already…
thecardcaptor
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Using R, how can I correctly subtract a second from a POSIXct variable using dplyr's lead and lag functions?

I have 12 dates and times in a table in POSIXct format: Time 1 2017-03-11 01:10:09 2 2017-03-11 03:07:58 3 2017-03-12 19:16:47 4 2017-03-13 09:52:04 5 2017-03-17 20:36:35 6 2017-03-18 03:10:54 7 2017-03-18 07:29:31 8 …
Rb99
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Lead Assignment Rules

I am newbie in Salesforce and my company is switching our CRM to Salesforce. So currently we are learning and doing gap analysis. Previously we had 50+ active lead assignment rules each contains various queries but in salesforce we can have only one…
Nishtha garg
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SQL lead function based on two columns

I have a table with about 700 million rows, which have the below sample for only one line_id. LINE_ID|COLLECTION_DATE |DSL_CARD_TYPE| -------|-------------------|-------------| 1234567|2020-03-25 08:46:08|ADSL_PORT | 1234567|2020-03-26…
Ahmed Mohammed Abdel Kader
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R Configure Data With Data.Table

data=data.frame("Student"=c(1,1,1,2,2,2,3,3,3,4,4,4,5,5,5), "Grade"=c(5,6,7,3,4,5,4,5,6,8,9,10,2,3,4), "Pass"=c(NA,0,1,0,1,1,0,1,0,0,NA,NA,0,0,0), "NEWPass"=c(0,0,1,0,1,1,0,1,1,0,0,0,0,0,0), …
bvowe
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How to resolve OperationalError: near "(": syntax error in sqldf python?

I am running a simple query on pandas-dataframe: l="""select LEAD(quarter_num,1) OVER (ORDER BY col1 , col2, col3) AS next from df""" out=ps.sqldf(l, locals()) Error:OperationalError: near "(": syntax error Is Lead function not supported in…
MAC
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How to do LAG & LEAD in Google BigQuery SQL?

Is there a function or a way to do LEAD & LAG in Google Big Query SQL to predict new customer, recurring customers, and churned customers? My Table Order_ID | Date_Start | Date_End | 001 | 2020-1-1 | 2020-2-1 | 001 | 2020-2-1 |…
Shang Rong
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Why does my lead-function generate NA values?

I have had to construct a reference table to keep track of what amount of academic credits our students should have taken given the current date. I have one row per admissionround and course. I want to code a finished-variable that takes the value…
Magnus
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