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Find the most profitable Kindle niche categories

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Category name Best seller rank 50th book's rank Median sales($) Median price ($) Volatility (%) New releases (%) Self pub.(%) KDP Select (%) Competition
Books > Computers & Technology > Databases & Big Data 1,920 35,949 $9,812 $31.86 75% 0% 25% 0% ~ 30,000
Books > Engineering & Transportation > Engineering > Industrial, Manufacturing & Operational Systems > Robotics & Automation 1,130 85,819 $2,982 $17.75 100% 15% 30% 3% ~ 10,000
Books > Computers & Technology > Databases & Big Data > Data Processing 4,544 104,778 $5,735 $40.97 95% 0% 15% 0% ~ 10,000
Books > Computers & Technology > Databases & Big Data > Data Modeling & Design 3,250 183,775 $836 $29.89 95% 5% 45% 10% ~ 3,000
Books > Computers & Technology > Databases & Big Data > Data Warehousing 14,291 199,280 $916 $32.74 100% 0% 15% 3% ~ 885
Books > Computers & Technology > Databases & Big Data > SQL 20,271 237,121 $762 $27.24 95% 0% 30% 3% ~ 2,000
Books > Business & Money > Processes & Infrastructure > Office Automation 3,936 287,762 $252 $9 100% 20% 65% 0% ~ 1,000
Books > Engineering & Transportation > Engineering > Construction > Plumbing & Household Automation 8,550 331,958 $651 $23.26 95% 15% 50% 10% ~ 1,000
Books > Computers & Technology > Databases & Big Data > Data Mining 3,499 508,524 $2,344 $27.91 100% 0% 40% 10% ~ 5,000
Books > Computers & Technology > Databases & Big Data > MySQL 41,961 554,484 $736 $26.31 95% 10% 25% 3% ~ 614
Books > Computers & Technology > Databases & Big Data > Access 104,624 696,796 $669 $23.91 100% 15% 20% 10% ~ 3,000
Books > Computers & Technology > Databases & Big Data > Relational Databases 132,558 1,410,358 $0 $19.99 100% 15% 75% 0% ~ 852