csvtools | Tools for transforming .csv files | CSV Processing library
kandi X-RAY | csvtools Summary
kandi X-RAY | csvtools Summary
Tools for transforming .csv files
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Top functions reviewed by kandi - BETA
- Combine two rows
- Append csv to the output stream
- Extractors from header
- Write the table to the writer
- Extracts a map file
- Binds the field to the given row
- Read rows from a stream
- Process records into the writer
- Select fields from input file
- Parse field_maps
- Parse a field map
- Return a value extractor
- Return an index extractor function
- Parse command line arguments
- Generate a snapshot of the rows in a table
- Append data to the output stream
- Unzip the contents of a CSV file
- Set sys stdout to binary
- Process the records from the reader
- Pad a csv
- Add id field to items
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csvtools Examples and Code Snippets
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Trending Discussions on csvtools
QUESTION
currently we need to merge massive files (multiple GB-CSV files). As it is right now I've written a java code to dynamically update the data. Sadly the performance is extremely low. Due to our provided architecture we're forced to use either this or a bash-script. We can't install any packages, so csvtools is out of reach as well. We can only use native Ubuntu-functions.
What we have: 2 csv-files with an unknown schema. We only know that the first entry is always the ID which is the primary key. The 2 compared files itself have always the same schema. It is required to either update old entries with the 2nd file, and insert non-existent KV.
Example 1:
example1.csv
...ANSWER
Answered 2020-Dec-14 at 15:36Resolved it myself. Since the ID is always the first column I use it as a blacklist.
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