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We can't be everywhere at once we know—shocking! The Microsoft Scripting Guys 0 2. Sign in to vote. I like a Script to merge multiple CSV files together with no duplicate records.
Monday, March 2, PM. This worked for me. So it is starts duplicating. Does that make sense? Saturday, March 28, AM. What does your script look like so far? Add a comment. Active Oldest Votes. Improve this answer. Wouldn't this copy the rows in a common file instead of the columns? Kusalananda no, it's just concatenating the files. In this particular case, what the OP wants is: for each individual line of all input files, append the fields line to make one long line with all the columns, and then repeat the process for all subsequent lines.
This is hard to describe unambiguously in plain English - the algorithm in my perl script or the more memory-efficient algorithm described after it explains it better and is easier to follow.
This answer will duplicate the headers. Use head -n 1 file1. This will merge all the CSVs into one like this answer, but with only one set of headers at the top. Assumes that all CSVs share headers. It is called combined. Show 1 more comment. This would be a useful answer if you described what the code is doing and what expectations you have on the input data. I found this useful as well so I'll expand It just concatenate one csv below the other and not column side by side.
Dan F Dan F 1 1 silver badge 1 1 bronze badge. This the only solution that deals with the non-obvious cases, even though it requires a dedicated tool. Exactly what I was looking for. Chris Chris 4 4 silver badges 13 13 bronze badges. AdminBee Rohit Salecha Rohit Salecha 2 2 bronze badges. Welcome to the site. I'm afraid your solution is not what the OP wants.
Your approach concatenates the files line-wise, whereas the OP wants to concatenate them colums-wise i. Also, your approach would remove not only headers, but all duplicates, including those which may be intentional. It is a library written in Python for data munging and analysis. It provides highly optimized data structures and high-performing functions for working with data.
Pandas handle data from MB to 1GB quite efficiently and give an exuberant performance. Put all the csv files to combine into the same folder. Paste the following code into the powershell window that pops up and hit enter. I have a few csv files in a folder, I want to merge all of them using an apply function.
Step 1 — I tried first listing all the files from a folder. Step 2 — Save all csv files from the step 1 to the work directory using an apply function. This answer will duplicate the headers. Use head -n 1 file1.
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