2012年全球IT科技公司专利申请实力排行榜
2012年年底，美国科技杂志《IEEE Spectrum》公布了各个领域的专利排名，从公布的专利排行榜中你
发布时间：2天前 属于：IT业
| Rank | DBMS | Database Model | Score | Changes |
| 1. |
Oracle  |
Relational DBMS | 1527.64 | +12.74 |
| 2. |
Microsoft SQL Server |
Relational DBMS | 1321.99 | +35.77 |
| 3. |
MySQL |
Relational DBMS | 1305.23 | -29.71 |
| 4. |
PostgreSQL |
Relational DBMS | 182.37 | -17.01 |
| 5. |
DB2 |
Relational DBMS | 168.43 | -8.61 |
| 6. |
Microsoft Access |
Relational DBMS | 141.64 | -8.02 |
| 7. |
MongoDB |
Document store | 140.46 | +2.97 |
| 8. |
Sybase |
Relational DBMS | 86.20 | -2.21 |
| 9. |
SQLite |
Relational DBMS | 82.81 | -5.01 |
| 10. |
Teradata |
Relational DBMS | 56.34 | +5.23 |
| 11. |
Solr |
Search engine | 45.48 | -0.95 |
| 12. |
Cassandra |
Wide column store | 42.24 | +4.60 |
| 13. |
FileMaker |
Relational DBMS | 34.49 | |
| 14. |
Redis |
Key-value store | 33.09 | -1.13 |
| 15. |
Memcached |
Key-value store | 29.45 | -1.27 |
| 16. |
HBase |
Wide column store | 25.91 | +0.13 |
| 17. |
Informix |
Relational DBMS | 24.58 | -0.15 |
| 18. |
Hive |
Relational DBMS | 18.53 | -3.63 |
| 19. |
CouchDB |
Document store | 17.21 | +1.28 |
| 20. |
Firebird |
Relational DBMS | 13.02 | -1.53 |
| 21. |
Netezza |
Relational DBMS | 12.37 | +0.93 |
| 22. |
Elasticsearch |
Search engine | 10.64 | +1.13 |
| 23. |
dBASE |
Relational DBMS | 9.85 | -0.59 |
| 24. |
Neo4j |
Graph DBMS | 8.92 | +0.08 |
| 25. |
Riak |
Key-value store | 8.77 | -0.22 |
| 26. |
Sphinx |
Search engine | 8.51 | -0.51 |
| 27. |
Vertica |
Relational DBMS | 8.02 | -0.39 |
| 28. |
SAP HANA |
Relational DBMS | 7.88 | +0.10 |
| 29. |
Couchbase |
Document store | 6.83 | +0.46 |
| 30. |
Greenplum |
Relational DBMS | 6.82 | -0.32 |
| 31. |
Ehcache |
Key-value store | 6.19 | -0.13 |
| 32. |
Ingres |
Relational DBMS | 5.84 | -0.01 |
| 33. |
DynamoDB |
Key-value store | 5.31 | +0.34 |
| 34. |
MariaDB |
Relational DBMS | 4.88 | +0.51 |
| 35. |
Sybase IQ |
Relational DBMS | 4.72 | +0.55 |
| 36. |
Interbase |
Relational DBMS | 4.61 | -0.47 |
| 37. |
MarkLogic |
Native XML DBMS | 4.36 | -0.30 |
| 38. |
SQL Anywhere |
Relational DBMS | 3.99 | -0.63 |
| 39. |
RavenDB |
Document store | 3.78 | -0.53 |
| 40. |
Adabas |
Multivalue DBMS | 3.60 | -0.62 |
| 41. |
mSQL |
Relational DBMS | 3.28 | -0.15 |
| 42. |
Jackrabbit |
Content store | 3.19 | -0.65 |
| 43. |
Berkeley DB |
Key-value store | 2.96 | -0.53 |
| 44. |
SimpleDB |
Key-value store | 2.95 | +0.21 |
| 45. |
Derby |
Relational DBMS | 2.77 | -0.14 |
| 46. |
UniData,UniVerse |
Multivalue DBMS | 2.47 | -0.25 |
| 47. |
MaxDB |
Relational DBMS | 2.43 | -0.02 |
| 48. |
Coherence |
Key-value store | 2.24 | +0.14 |
| 49. |
Google Search Appliance |
Search engine | 2.03 | +0.09 |
| 50. |
Virtuoso |
Relational DBMS | 2.02 | -0.16 |
