I have a 13gb .txt file which I am importing into MySQL, however I don't want to import all of the data. For example there are many columns that are either completely empty or contain irrelevant information - I only want to import ~100/360 I've been provided. If I only create headers for the columns I want, can I select the specific corresponding data from the .txt file to be uploaded?
Normally I would use a text editor to remove the superfluous data, but I do not possess a text editor that can handle a file of this size.
You can ignore specific columns in the input file by assigning them to a user-defined variable instead of a database column.
For example if you had a CSV file with 4 columns and just wanted to import columns 1 and 4 into your table you could do something like this:
load data infile '/tmp/so42140337.csv'
into table so42140337
fields terminated by ','
lines terminated by '\n'
(c1,#dummy,#dummy,c2);
Given the size of your input file it may be more efficient to import it in chunks rather than importing the entire file in one command. You can use the pt-fifo-split tool for this, following the pattern in this blog post.
Related
I have a text file that has the field headers on the first line, and the following lines are space separated fields. The spacing between each field is different. There are 45 fields. Specifically, this is an eBird dataset. I want to load this text file into a newly created table within a database I created, so that each header is the field header in the database and each line below the headers are records. Here is a small example of the files format:
Header1 Header2 Header3 Header4
082739 United States US-CA-01 1
I haven't tried anything yet, because I want to know what to do before I load this data into a table. I have this command prepared:
LOAD DATA INFILE <file_path> INTO TABLE <table_name> FIELDS TERMINATED BY ' ';
Will this command populate the table so that each field corresponds to each header, or do I need to tell the command how many spaces there are between each field? Will the command know that each line is terminated by a newline if not told?
Looks like there's an R package for filtering and processing the EBD dataset. Using R you should be able to process the data into a more manageable format for insertion into MariaDB.
For example, you can separate the fields with commas to generate CSV-formatted data that can be readily ingested by MariaDB.
I am importing some thousands lines of Data from a .txt file containing two columns and the format is as it follows:
A8041550408#=86^:|blablablablablablablablablablablablablablablablablablablabla1
blablablablablablablablablablablablablablablablablablablabla2
blablablablablablablablablablablablablablablablablablablabla3
A8041550408#=86^:|blablablablablablablablablablablablablablablablablablablabla1
blablablablablablablablablablablablablablablablablablablabla2
A8041550408#=86^:|blablablablablablablablablablablablablablablablablablablabla1
blablablablablablablablablablablablablablablablablablablabla2
blablablablablablablablablablablablablablablablablablablabla3
blablablablablablablablablablablablablablablablablablablabla4
etc....
What I have done so far is create a table with the two fields, but when i try to import the .txt file as a CSV and putting / Columns separated By : | /, I get an error:
"Invalid column count in CSV input on line 2."
Which is quite obvious since the second line of the .txt file is empty.
Moreover, I have tried importing the file as a CSV using LOAD DATA, and it didn't work as well it has just filled up the table with random words and phrases from the .txt file .
So my question is : How can I import the data from this file ?
You have to fix your file; in its current state you cannot expect the import module to be able to understand it. First step would be to remove the empty lines: How to remove blank lines from a Unix file
How do I import a .txt file into a MySQL table?
My .txt file is like this...
ex : AF0856427R1 000002200R HADISUMARNO GGKAMP MALANG WET 3 6 00705 AFAAADF16000-AD-FA P00.001.0 1 000001.00022947.70023290.00 T511060856425A 022014B
There are 39 fields in my file.
Try mysqlimport command
name of the text file should be the name of the table in which you want the data to be imported. For eg, if your file name is patient.txt, data will be imported into patient table
mysqlimport [options] db_name textfile
There are lot of options that you can pass in. Documentation here
Especially since some of your fields are terminated by spaces and some are based on string length, I would definitely first do some string manipulation with your favorite tool (sed, awk, and perl are all likely very good choices).
Create an intermediary comma separated file. If you have commas in the existing file, you can easily use some other character. The goal is to create a file that has one consistent separator.
You've used the phpMyAdmin tag, so from your table go to the Import tab, select the file, and pick CSV from the dropdown of file types. Edit the options according to what your file looks like (for instance, perhaps § is your column separator and you might leave the next two options blank). Then try the import and check the data to make sure it all arrived in the columns you expected.
Good luck.
How can I load 10,000 rows of test.xls file into mysql db table?
When I use below query it shows this error.
LOAD DATA INFILE 'd:/test.xls' INTO TABLE karmaasolutions.tbl_candidatedetail (candidate_firstname,candidate_lastname);
My primary key is candidateid and has below properties.
The test.xls contains data like below.
I have added rows starting from candidateid 61 because upto 60 there are already candidates in table.
please suggest the solutions.
Export your Excel spreadsheet to CSV format.
Import the CSV file into mysql using a similar command to the one you are currently trying:
LOAD DATA INFILE 'd:/test.csv'
INTO TABLE karmaasolutions.tbl_candidatedetail
(candidate_firstname,candidate_lastname);
To import data from Excel (or any other program that can produce a text file) is very simple using the LOAD DATA command from the MySQL Command prompt.
Save your Excel data as a csv file (In Excel 2007 using Save As) Check
the saved file using a text editor such as Notepad to see what it
actually looks like, i.e. what delimiter was used etc. Start the MySQL
Command Prompt (I’m lazy so I usually do this from the MySQL Query
Browser – Tools – MySQL Command Line Client to avoid having to enter
username and password etc.) Enter this command: LOAD DATA LOCAL INFILE
‘C:\temp\yourfile.csv’ INTO TABLE database.table FIELDS TERMINATED
BY ‘;’ ENCLOSED BY ‘”‘ LINES TERMINATED BY ‘\r\n’ (field1, field2);
[Edit: Make sure to check your single quotes (') and double quotes (")
if you copy and paste this code - it seems WordPress is changing them
into some similar but different characters] Done! Very quick and
simple once you know it :)
Some notes from my own import – may not apply to you if you run a different language version, MySQL version, Excel version etc…
TERMINATED BY – this is why I included step 2. I thought a csv would default to comma separated but at least in my case semicolon was the deafult
ENCLOSED BY – my data was not enclosed by anything so I left this as empty string ”
LINES TERMINATED BY – at first I tried with only ‘\n’ but had to add the ‘\r’ to get rid of a carriage return character being imported into the database
Also make sure that if you do not import into the primary key field/column that it has auto increment on, otherwhise only the first row will be imported
Original Author reference
I've read through some other posts and nothing quite answers my question specifically.
I have an existing database in phpMyAdmin - a set of pin codes we use to collect contest entries.
The DB has about 10,000 pin codes in it.
I need to add 250 "New" codes to it. I have an excel file that is stripped down to a single column .csv, no header - just codes.
What I need to do is import this into the table named "pin2" and add these to the row called "pin"
The other rows are where entrants would add names and phone numbers, so are all "null"
I've uploaded a screen grab of the structure.
DB Structure http://www.redpointdesign.ca/sql.png
any help would be appreciated!
You need to use a LOAD DATA query similar to this:
LOAD DATA INFILE 'pincodes.csv'
INTO TABLE pin2 (pin)
If the pin codes in the csv file are enclosed in quotes you may also need to include an ENCLOSED BY clause.
LOAD DATA INFILE 'pincodes.csv'
INTO TABLE pin2
FIELDS ENCLOSED BY '"'
(pin)
If you wants to do using csv
Then you need to need to follow these steps
Manually define autoincremented value in first comlumn.
In other column you have to externally define it as a NULL,
otherwise you will get Invalid column count in CSV input on line 1.
because column with no value is not consider by phpmyadmin
Them click on import in phpmyadmin and you are done ..