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Patent Data Cleanup (June 2016) (view source)
Revision as of 11:33, 7 July 2016
, 11:33, 7 July 2016→About this Page
This page contains the script that was used to clean up the patents and assignees tables in allpatent.
Cleaning up includes:
* Cleaning 'NULL' string and -1 inserts : at the time of merging the patentdata and patent_2015 databases, I inserted 'NULL' strings and -1 in integer columns to differentiate between NULLs that came from the vendor, and 'NULL's that I inserted because of no column overlap.
** The 'NULL's got replaced with NULL
** The -1s got replaced with NULL as well.
* Merging some more columns, and dropping unnecessary columns:
** At the time of merging the tables, some columns, particularly in the patent table, were not merged as they should have been.
** The script that follows merges those columns as well.
NOTE: The patent data page detailing the SQL steps followed to merge the data now has the updated table structures. The script on this page can be used as a reference when trying to debug any (unlikely) merging errors
* Renaming tables and columns
** Table names and column names have been standardized.
** General rule of thumb is : short column names, singular table names (for example : patent and not patents)
== Script ==
