lookup

问题 I would like to compare two tables, one from Access Mdb & one SQL server table is SSIS. The goal is to truncate the table if there is differences and fill it with MDB source and Update the version in another table. I am trying to do it through a lookup but the Version is incremented with the number of rows and it should be once. The operation needs to be performed with 2 different Tables. 回答1: How am I supposed to perform only once the update even if I have 10 No Match output rows ? SSIS

问题 I've followed multiple tutorials on scenario analysis and what if analysis in power BI. these examples are quite clear to me and I somewhat understand how they work. For example this (https://community.powerbi.com/t5/Community-Blog/Scenario-Analysis-What-Ifs-Tips-amp-Techniques-For-Power-BI/ba-p/559653). In this example they create a table that contains values for different scenarios 5% 10% 15% 20% etc. and the user of the report can select these. But what if instead of direct values I have

问题 I am trying to do a lookup of a subset of data using multiple criteria and returning the column header that meets the defined criteria. Each unique identifier has received an award from a judge (tab1). I would like to use a formula (or a macro) to return who the judge was that awarded the highest award in tab2. In the worksheet on the second tab, I have been trying to use an index and match formula in the "Judge" column to accomplish this. However, my formula returns #N/A. My formula is

问题 am sure this is an easy question but getting confused between all the formulas- Lookup , Match , Index etc. I have 2 sheets - SOW Actuals and RAW Project data . In column N of SOW Actuals I have the values I am trying to find in cells A2:A60 of Raw Project data . When the formula finds a value I want it to return the value from column G on the same row in Raw Project data . 回答1: INDEX and MATCH are more efficient and flexible than VLOOKUP . In your case, try: =INDEX('RAW Project Data'!$G$2:$G

问题 Why When comparing and deduplicating across two lists coders don't often find the most runtime-efficient implementation while under time-pressure. Two nested for-loops is a common goto solution for many coders. One might try a CROSS JOIN with LINQ, but this is clearly inefficient. Coders need a memorable and code-efficient approach for this that is also relatively runtime-efficient. This question was created after seeing a more specific one: Delete duplicates in a single dataset relative to

问题 I need to update a table column in one table with data from another based on whether a specific id matches. Basically, I have the following schema: TABLE accounts FIELD old_user_id TABLE users FIELD old_user_id FIELD new_user_id I need to loop through all old_user_id's in the accounts table checking them against the old_user_id field in the users table, and then take the new_user_id value in the users table and replace the old_user_id value in the accounts table. Seems like a simple thing to

问题 I have a collection of users. User have an int64 "id", and lets say "avatar", "name" and an array of other users ids. What I want to achieve is to query SINGLE user, but instead of getting an array with his friends ids I want to get an array of his friends, containing their names and avatars. How to achieve it in golang? I have found some kind of what I need - "lookup" function, but I cannot understand how to use it right. 回答1: You cannot apply $lookup to array directly, but you can to

问题 I need a formula/function to concatenate cell values from one column and multiple rows. The matching criteria is applied to a different column. Here is my example of what I have to do: Islington | "Bunhill" | EC2M Islington | "Bunhill" | EC2Y Islington | "Bunhill" | N1 Barnet | "Burnt Oak" | HA8 Barnet | "Burnt Oak" | NW7 Barnet | "Burnt Oak" | NW9 The end result needs to look like this: Islington | "Bunhill" | EC2M, EC2Y, N1 Barnet | "Burnt Oak" | HA8, NW7, NW9 Basically, I need to remove

问题 I have a table in Excel with column and row headers and corresponding values. How do I lookup in Excel both the column and row header names/index by value in the table? In Mathematica the equivalent function is Position[listoflist,value] EDIT: I made a simple function in VBA, but this is far from perfect Function MathematicaPosition(lookvalue As Range, TableRange As Range, RowOrColumn As Boolean) As Integer Dim r As Integer Dim c As Integer Dim tempindex As Integer Dim i As Integer, j As

问题 I was curious if there was something akin the the Java hashset in c++. I.e a data structure with fast look, as I will only be running .contains(e) on it. Likewise, if you could enlighten me on how to do a .contains() on whatever data structure you propose, I would be very appreciative. O, please do not post just look at the c++ docs as I have already done so and find them burdensome. 回答1: You can use std::unordered_set<> (standard § 23.5.6), its find method (to do a lookup) as an average