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Edgar F. Codd

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In the 1960s and 1970s, he worked out his theories of data arrangement, issuing his paper "A Relational Model of Data for Large Shared Data Banks" in 1970, after an internal IBM paper one year earlier. To his disappointment, IBM proved slow to exploit his suggestions until commercial rivals started
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As the relational model became fashionable in the early 1980s, Codd fought a sometimes bitter campaign to prevent the term from being misused by database vendors who had merely added a relational veneer to older technology. As part of this campaign, he published his
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the company promoted in the 1970s. Codd then showed IBM customers the potential of the implementation of its model, and they, in turn, pressured IBM. Then IBM included in its
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subproject – but put in charge of it developers who were not thoroughly familiar with Codd's ideas, and isolated the team from Codd. As a result, they did not use Codd's own
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to define what constituted a relational database. This made his position at IBM increasingly difficult, so he left to form a consulting company with Chris Date and others.
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The Database Relational Model: A Retrospective Review and Analysis: A Historical Account and Assessment of E. F. Codd's Contribution to the Field of Database Technology
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Rubenstein, Steve. "Edgar F. Codd – computer pioneer in databases." San Francisco Chronicle 24 April 2003: A21. Gale Biography in Context. Web. 1 December 2011.
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and wrote the "twelve laws of online analytical processing". Controversy erupted, however, after it was discovered that this paper had been sponsored by
2352: 2337: 2332: 278:, but the relational model, a very influential general theory of data management, remains his most mentioned, analyzed and celebrated achievement. 2387: 2382: 929: 322:. Codd first worked for the company's Selective Sequence Electronic (SSEC) project and was later involved in the development of IBM 701 and 702. 2372: 2347: 522: 1312: 1146: 1096: 1016: 892: 615: 271: 2312: 1869: 1370: 660: 442:
language but created a non-relational one, SEQUEL. Even so, SEQUEL was so superior to pre-relational systems that in 1979 it was copied by
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United States – 1981. For his fundamental and continuing contributions to the theory and practice of database management systems.
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he volunteered for active duty and became a flight lieutenant in the Royal Air Force Coastal Command, flying Sunderlands
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Providing OLAP to User-Analysts: An IT Mandate by E F Codd, S B Codd and C T Salley, ComputerWorld, 26 July 1993.
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Michael Owens. The Definitive Guide to SQLite, p. 47. New York: Apress (Springer-Verlag) 2006.
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Codd continued to develop and extend his relational model, sometimes in collaboration with
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Codd received a PhD in 1965 from the University of Michigan, Ann Arbor, advised by
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Initially, IBM refused to implement the relational model to preserve revenue from
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Propagation, Computation, and Construction in Two-dimensional cellular spaces
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Propagation, Computation, and Construction in Two-dimensional cellular spaces
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in 1976. During the 1990s, his health deteriorated and he ceased work.
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Codd, E. F. 1974 "Recent Investigations into Relational Data Base" in
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Introduction to the History of Computing: A Computing History Primer
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Funding a Revolution: Government Support for Computing Research
777:"12 simple rules: How Ted Codd transformed the humble database" 349:, where he continued to work until the 1980s. He was appointed 1977: 1221:. San Francisco, CA: Morgan Kaufmann Publishers. p. 124. 691:"Relational database: A practical foundation for productivity" 455: 255: 197: 885:
Giants of Computing: A Compendium of Select, Pivotal Pioneers
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and showing that a set of eight states was sufficient for
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SQL Routines and Types for the Java Programming Language
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1994 fellows of the Association for Computing Machinery
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Joe Celko's Data and Databases: Concepts in Practice
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He made other valuable contributions to 31: 706: 588: 571:——— (9 November 1981). 561: 2368:People educated at Poole Grammar School 678: 2378:Royal Air Force pilots of World War II 988:(PhD thesis). University of Michigan. 523:SIGMOD Edgar F. Codd Innovations Award 272:relational database management systems 266:management, the theoretical basis for 1322:National Academy of Sciences (1999). 1073:from the original on 8 September 2004 920:Campbell-Kelly, Martin (1 May 2003). 639:from the original on 7 November 2005. 379:, at the age of 79 on 18 April 2003. 7: 2343:Scientists from San Jose, California 1141:. Dordrecht: Springer. p. 278. 932:from the original on 9 December 2010 878: 876: 661:List of pioneers in computer science 314:during the Second World War, flying 1264:Whitehorn, Mark (26 January 2007). 501:Online analytical processing (OLAP) 366:Association for Computing Machinery 310:, before serving as a pilot in the 2262:Information and Definition Schemas 25: 521:renamed its highest prize to the 2353:People from the Isle of Portland 2338:Alumni of Exeter College, Oxford 2333:IBM Research computer scientists 1343: 42: 1035:Codd, Edgar Frank (June 1970). 341:. Two years later, he moved to 2388:Military personnel from Dorset 2383:Researchers of artificial life 606:——— (1990). 415:was implemented only in 2010. 1: 2373:People from Aventura, Florida 2348:University of Michigan alumni 1266:"OLAP and the need for Speed" 1166:. Charles Babbage Institute. 729:Mathematics Genealogy Project 325:In 1953, dismayed by Senator 302:, he studied mathematics and 286:Edgar Frank Codd was born in 971:, IBM Research, 2003 Apr 23. 347:San Jose Research Laboratory 2313:English computer scientists 2252:Management of External Data 824:author profile page at the 298:, England. After attending 2404: 2272:XML-Related Specifications 1307:. Addison Wesley Longman. 1007:Codd, Edgar Frank (1968). 535:Codd, Edgar Frank (1968). 27:English computer scientist 2247:Persistent Stored Modules 1396: 1044:Communications of the ACM 695:Communications of the ACM 666:Relational Model/Tasmania 577:Communications of the ACM 233: 168: 138:Codd's cellular automaton 41: 2257:Object Language Bindings 1135:O'Regan, Gerard (2016). 969:Edgar F Codd Passes Away 883:O’Regan, Gerard (2013). 1011:. London: Academic Pr. 864:"Edgar F. ("Ted") Codd" 399:, extending on work of 391:. His thesis was about 254:who, while working for 2318:Turing Award laureates 2308:Royal Air Force airmen 1410:Maurice Vincent Wilkes 1348:Quotations related to 866:. A. M. Turing award. 656:Database normalization 473:, is named after him. 471:Boyce–Codd normal form 335:University of Michigan 308:Exeter College, Oxford 194:University of Michigan 150:Boyce–Codd normal form 126:Database normalization 112:University of Michigan 108:Exeter College, Oxford 1056:10.1145/362384.362685 708:10.1145/358396.358400 590:10.1145/358396.358400 498:Codd coined the term 428:hierarchical database 405:universal computation 2363:Cellular automatists 2303:Database researchers 2242:Call-Level Interface 956:15 June 2009 at the 807:Bibliography Server 514:withdrew the paper. 343:San Jose, California 300:Poole Grammar School 268:relational databases 190:University of Oxford 2216:Relational database 1838:Michael Stonebraker 1610:Fernando J. Corbató 1243:Proc. 1974 Congress 1217:Celko, Joe (1999). 485:relational calculus 463:Christopher J. Date 419:implementing them. 345:, to work at IBM's 312:RAF Coastal Command 1794:Charles P. Thacker 1638:Richard E. Stearns 1514:Kenneth E. Iverson 1450:Edsger W. Dijkstra 1434:James H. Wilkinson 1387:A. M. Turing Award 1114:The New York Times 843:www.britannica.com 539:. Academic Press. 481:relational algebra 389:John Henry Holland 356:Codd received the 252:computer scientist 228:John Henry Holland 2280: 2279: 2225:ISO/IEC SQL parts 1944: 1943: 1802:Leslie G. Valiant 1674:Douglas Engelbart 1646:Edward Feigenbaum 1314:978-0-201-61294-3 1148:978-3-319-33138-6 1097:978-1-59059-673-9 1018:978-0-12-178850-6 1009:Cellular Automata 894:978-1-4471-5339-9 687:Codd, Edgar Frank 617:978-0-201-14192-4 537:Cellular Automata 525:, in his honour. 397:cellular automata 237: 236: 170:Scientific career 164: 96:Aventura, Florida 16:(Redirected from 2395: 2196: 2189: 2182: 2175: 2168: 2161: 2154: 2147: 2140: 2133: 2126: 2119: 2112: 2105: 2098: 2091: 2084: 2077: 2070: 2063: 1971: 1964: 1957: 1948: 1937: 1929: 1921: 1913: 1901: 1889: 1873: 1866:John L. Hennessy 1861: 1853: 1850:Whitfield Diffie 1841: 1833: 1825: 1818:Shafi Goldwasser 1813: 1805: 1797: 1789: 1781: 1774:E. Allen Emerson 1770:Edmund M. Clarke 1765: 1757: 1749: 1737: 1729: 1713: 1701: 1693: 1685: 1677: 1669: 1661: 1653: 1641: 1629: 1621: 1613: 1605: 1597: 1589: 1581: 1569: 1561: 1553: 1541: 1533: 1525: 1517: 1509: 1501: 1493: 1486:Michael O. Rabin 1481: 1478:Herbert A. Simon 1469: 1461: 1453: 1445: 1437: 1429: 1421: 1413: 1405: 1380: 1373: 1366: 1357: 1347: 1333: 1318: 1306: 1283: 1282: 1280: 1278: 1261: 1255: 1252: 1246: 1239: 1233: 1232: 1214: 1208: 1207: 1205: 1203: 1189: 1183: 1182: 1180: 1178: 1159: 1153: 1152: 1132: 1126: 1125: 1123: 1121: 1106: 1100: 1089: 1083: 1082: 1080: 1078: 1072: 1041: 1032: 1023: 1022: 1004: 998: 997: 978: 972: 966: 960: 948: 942: 941: 939: 937: 917: 908: 905: 899: 898: 880: 871: 870: 860: 854: 853: 851: 849: 835: 829: 819: 813: 812: 801:Edgar Frank Codd 798: 792: 791: 789: 787: 773: 767: 766: 761: 759: 742: 731: 722: 713: 712: 710: 683: 640: 638: 631: 621: 602: 592: 567: 565: 554:Database Systems 548: 467:normalised forms 393:self-replication 329:, Codd moved to 292:Isle of Portland 276:computer science 260:relational model 223:Doctoral advisor 217: 180:Computer Science 162: 134:Relational model 87: 64: 62: 55:Edgar Frank Codd 46: 36:Edgar "Ted" Codd 32: 21: 2403: 2402: 2398: 2397: 2396: 2394: 2393: 2392: 2283: 2282: 2281: 2276: 2220: 2199: 2192: 2185: 2178: 2171: 2164: 2157: 2150: 2143: 2136: 2129: 2122: 2115: 2108: 2101: 2094: 2087: 2080: 2073: 2066: 2059: 2046: 1980: 1975: 1945: 1940: 1932: 1926:Robert Metcalfe 1924: 1916: 1904: 1892: 1882:Geoffrey Hinton 1876: 1870:David Patterson 1864: 1858:Tim Berners-Lee 1856: 1844: 1836: 1828: 1816: 1808: 1800: 1792: 1784: 1768: 1760: 1752: 1740: 1732: 1726:Leonard Adleman 1716: 1710:Kristen Nygaard 1704: 1696: 1688: 1680: 1672: 1664: 1656: 1644: 1634:Juris Hartmanis 1632: 1624: 1616: 1608: 1600: 1594:Ivan Sutherland 1592: 1584: 1572: 1564: 1556: 1544: 1536: 1528: 1520: 1512: 1506:Robert W. Floyd 1504: 1496: 1484: 1472: 1464: 1458:Charles Bachman 1456: 1448: 1440: 1432: 1424: 1418:Richard Hamming 1416: 1408: 1400: 1392: 1384: 1340: 1321: 1315: 1295: 1292: 1290:Further reading 1287: 1286: 1276: 1274: 1263: 1262: 1258: 1253: 1249: 1240: 1236: 1229: 1216: 1215: 1211: 1201: 1199: 1193:"Edgar F. Codd" 1191: 1190: 1186: 1176: 1174: 1161: 1160: 1156: 1149: 1134: 1133: 1129: 1119: 1117: 1116:. 23 April 2003 1108: 1107: 1103: 1090: 1086: 1076: 1074: 1070: 1039: 1034: 1033: 1026: 1019: 1006: 1005: 1001: 980: 979: 975: 967: 963: 958:Wayback Machine 949: 945: 935: 933: 926:The Independent 919: 918: 911: 906: 902: 895: 882: 881: 874: 862: 861: 857: 847: 845: 837: 836: 832: 828:Digital Library 820: 816: 799: 795: 785: 783: 775: 774: 770: 757: 755: 744: 743: 734: 723: 716: 685: 684: 680: 675: 647: 636: 629: 624: 618: 605: 570: 551: 534: 531: 448:Oracle Database 385: 373:Williams Island 331:Ottawa, Ontario 327:Joseph McCarthy 284: 258:, invented the 215: 196: 192: 148: 146:Codd's 12 rules 144: 140: 136: 132: 128: 124: 110: 104:Alma mater 99: 92:Williams Island 89: 85: 76: 66: 60: 58: 57: 56: 37: 28: 23: 22: 15: 12: 11: 5: 2401: 2399: 2391: 2390: 2385: 2380: 2375: 2370: 2365: 2360: 2355: 2350: 2345: 2340: 2335: 2330: 2325: 2320: 2315: 2310: 2305: 2300: 2295: 2285: 2284: 2278: 2277: 2275: 2274: 2269: 2264: 2259: 2254: 2249: 2244: 2239: 2234: 2228: 2226: 2222: 2221: 2219: 2218: 2213: 2207: 2205: 2201: 2200: 2198: 2197: 2190: 2183: 2176: 2169: 2162: 2155: 2148: 2141: 2134: 2127: 2120: 2113: 2106: 2099: 2092: 2085: 2078: 2071: 2064: 2056: 2054: 2048: 2047: 2045: 2044: 2039: 2034: 2029: 2024: 2019: 2014: 2009: 2004: 1999: 1994: 1988: 1986: 1982: 1981: 1976: 1974: 1973: 1966: 1959: 1951: 1942: 1941: 1939: 1938: 1930: 1922: 1914: 1910:Jeffrey Ullman 1902: 1890: 1874: 1862: 1854: 1846:Martin Hellman 1842: 1834: 1830:Leslie Lamport 1826: 1814: 1806: 1798: 1790: 1786:Barbara Liskov 1782: 1778:Joseph Sifakis 1766: 1758: 1750: 1738: 1730: 1714: 1706:Ole-Johan Dahl 1702: 1694: 1686: 1678: 1670: 1662: 1654: 1642: 1630: 1626:Butler Lampson 1622: 1614: 1606: 1598: 1590: 1582: 1570: 1562: 1554: 1550:Dennis Ritchie 1542: 1534: 1526: 1518: 1510: 1502: 1494: 1482: 1470: 1462: 1454: 1446: 1438: 1430: 1422: 1414: 1406: 1397: 1394: 1393: 1385: 1383: 1382: 1375: 1368: 1360: 1354: 1353: 1339: 1338:External links 1336: 1335: 1334: 1319: 1313: 1291: 1288: 1285: 1284: 1256: 1247: 1234: 1227: 1209: 1184: 1154: 1147: 1127: 1101: 1084: 1024: 1017: 999: 973: 961: 943: 909: 900: 893: 872: 855: 830: 814: 793: 768: 732: 714: 701:(2): 109–117. 677: 676: 674: 671: 670: 669: 663: 658: 653: 646: 643: 642: 641: 622: 616: 603: 568: 563:10.1.1.86.9277 549: 530: 527: 506:Arbor Software 477:Codd's theorem 432:Future Systems 384: 381: 283: 280: 235: 234: 231: 230: 225: 219: 218: 207: 201: 200: 187: 183: 182: 177: 173: 172: 166: 165: 157: 153: 152: 142:Codd's theorem 122:Alpha language 119: 118:Known for 115: 114: 105: 101: 100: 90: 88:(aged 79) 82: 78: 77: 67: 65:19 August 1923 54: 52: 48: 47: 39: 38: 35: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 2400: 2389: 2386: 2384: 2381: 2379: 2376: 2374: 2371: 2369: 2366: 2364: 2361: 2359: 2356: 2354: 2351: 2349: 2346: 2344: 2341: 2339: 2336: 2334: 2331: 2329: 2326: 2324: 2323:IBM employees 2321: 2319: 2316: 2314: 2311: 2309: 2306: 2304: 2301: 2299: 2296: 2294: 2291: 2290: 2288: 2273: 2270: 2268: 2265: 2263: 2260: 2258: 2255: 2253: 2250: 2248: 2245: 2243: 2240: 2238: 2235: 2233: 2230: 2229: 2227: 2223: 2217: 2214: 2212: 2209: 2208: 2206: 2202: 2195: 2191: 2188: 2184: 2181: 2177: 2174: 2170: 2167: 2163: 2160: 2156: 2153: 2149: 2146: 2142: 2139: 2135: 2132: 2128: 2125: 2121: 2118: 2114: 2111: 2107: 2104: 2100: 2097: 2093: 2090: 2086: 2083: 2079: 2076: 2072: 2069: 2065: 2062: 2058: 2057: 2055: 2053: 2049: 2043: 2040: 2038: 2035: 2033: 2030: 2028: 2025: 2023: 2020: 2018: 2015: 2013: 2010: 2008: 2005: 2003: 2000: 1998: 1995: 1993: 1990: 1989: 1987: 1983: 1979: 1972: 1967: 1965: 1960: 1958: 1953: 1952: 1949: 1935: 1934:Avi Wigderson 1931: 1927: 1923: 1919: 1918:Jack Dongarra 1915: 1911: 1907: 1903: 1899: 1895: 1891: 1887: 1883: 1879: 1878:Yoshua Bengio 1875: 1871: 1867: 1863: 1859: 1855: 1851: 1847: 1843: 1839: 1835: 1831: 1827: 1823: 1822:Silvio Micali 1819: 1815: 1811: 1807: 1803: 1799: 1795: 1791: 1787: 1783: 1779: 1775: 1771: 1767: 1763: 1762:Frances Allen 1759: 1755: 1751: 1747: 1743: 1739: 1735: 1731: 1727: 1723: 1719: 1715: 1711: 1707: 1703: 1699: 1695: 1691: 1687: 1683: 1679: 1675: 1671: 1667: 1663: 1659: 1655: 1651: 1647: 1643: 1639: 1635: 1631: 1627: 1623: 1619: 1615: 1611: 1607: 1603: 1602:William Kahan 1599: 1595: 1591: 1587: 1583: 1579: 1578:Robert Tarjan 1575: 1574:John Hopcroft 1571: 1567: 1563: 1559: 1558:Niklaus Wirth 1555: 1551: 1547: 1543: 1539: 1535: 1531: 1530:Edgar F. 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Codd 818: 815: 811: 806: 802: 797: 794: 782: 778: 772: 769: 765: 754: 750: 747: 741: 739: 737: 733: 730: 726: 725:Edgar F. Codd 721: 719: 715: 709: 704: 700: 696: 692: 688: 682: 679: 672: 667: 664: 662: 659: 657: 654: 652: 649: 648: 644: 635: 628: 623: 619: 613: 609: 604: 600: 596: 591: 586: 583:(2): 109–17. 582: 578: 574: 569: 564: 559: 555: 550: 546: 542: 538: 533: 532: 528: 526: 524: 520: 515: 513: 512: 511:Computerworld 507: 503: 502: 496: 494: 488: 486: 482: 478: 474: 472: 468: 465:. 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J. 651:Hugh Darwen 401:von Neumann 316:Sunderlands 240:Edgar Frank 2287:Categories 2237:Foundation 2211:Edgar Codd 1906:Alfred Aho 1894:Ed Catmull 1886:Yann LeCun 1754:Peter Naur 1722:Adi Shamir 1718:Ron Rivest 1698:Andrew Yao 1586:John Cocke 1522:Tony Hoare 1490:Dana Scott 1350:E. F. Codd 936:24 October 673:References 434:project a 351:IBM Fellow 320:programmer 61:1923-08-19 18:Edgar Codd 2232:Framework 1742:Vint Cerf 1650:Raj Reddy 1390:laureates 1064:207549016 994:302172044 786:19 August 599:207577282 558:CiteSeerX 556:: 65–98. 517:In 2004, 339:Ann Arbor 304:chemistry 290:, on the 282:Biography 75:, England 2166:Truncate 2138:Order by 2096:Group by 2052:Keywords 2042:SQL:2023 2037:SQL:2016 2032:SQL:2011 2027:SQL:2008 2022:SQL:2006 2017:SQL:2003 2012:SQL:1999 1985:Versions 1746:Bob Kahn 1734:Alan Kay 1682:Jim Gray 1299:(2000). 1077:29 April 1068:Archived 990:ProQuest 984:(1965). 954:Archived 930:Archived 848:18 April 689:(1982). 645:See also 634:Archived 545:68-23486 493:12 rules 436:System R 264:database 2204:Related 2152:Prepare 1912:(2020) 727:at the 377:Florida 364:of the 2180:Update 2159:Select 2110:Insert 2103:Having 2082:Delete 2075:Create 2007:SQL-92 2002:SQL-89 1997:SQL-86 1992:SEQUEL 1936:(2023) 1928:(2022) 1920:(2021) 1900:(2019) 1888:(2018) 1872:(2017) 1860:(2016) 1852:(2015) 1840:(2014) 1832:(2013) 1824:(2012) 1812:(2011) 1804:(2010) 1796:(2009) 1788:(2008) 1780:(2007) 1764:(2006) 1756:(2005) 1748:(2004) 1736:(2003) 1728:(2002) 1712:(2001) 1700:(2000) 1692:(1999) 1684:(1998) 1676:(1997) 1668:(1996) 1660:(1995) 1652:(1994) 1640:(1993) 1628:(1992) 1620:(1991) 1612:(1990) 1604:(1989) 1596:(1988) 1588:(1987) 1580:(1986) 1568:(1985) 1560:(1984) 1552:(1983) 1540:(1982) 1532:(1981) 1524:(1980) 1516:(1979) 1508:(1978) 1500:(1977) 1492:(1976) 1480:(1975) 1468:(1974) 1460:(1973) 1452:(1972) 1444:(1971) 1436:(1970) 1428:(1969) 1420:(1968) 1412:(1967) 1404:(1966) 1311:  1225:  1145:  1095:  1062:  1015:  992:  891:  668:(RM/T) 614:  597:  560:  543:  519:SIGMOD 469:, the 452:SQL/DS 424:IMS/DB 362:Fellow 296:Dorset 216:(1965) 214:  205:Thesis 176:Fields 163:(1981) 156:Awards 73:Dorset 2187:Where 2173:Union 2124:Merge 1071:(PDF) 1060:S2CID 1040:(PDF) 637:(PDF) 630:(PDF) 595:S2CID 440:Alpha 98:, USA 2194:With 2145:Over 2131:Null 2117:Join 2089:From 2068:Case 1309:ISBN 1279:2014 1223:ISBN 1204:2024 1179:2024 1143:ISBN 1122:2021 1093:ISBN 1079:2020 1013:ISBN 938:2011 889:ISBN 850:2023 805:DBLP 788:2013 760:2013 612:ISBN 541:LCCN 483:and 426:, a 407:and 383:Work 270:and 262:for 248:Codd 130:OLAP 81:Died 51:Born 1978:SQL 1197:IBM 1168:hdl 1052:doi 826:ACM 803:at 753:ACM 703:doi 585:doi 456:SQL 395:in 337:in 306:at 294:in 256:IBM 244:Ted 198:IBM 2289:: 2061:As 1908:; 1896:; 1884:; 1880:; 1868:; 1848:; 1820:; 1776:; 1772:; 1744:; 1724:; 1720:; 1708:; 1648:; 1636:; 1576:; 1548:; 1488:; 1476:; 1326:. 1268:. 1195:. 1112:. 1066:. 1058:. 1048:13 1046:. 1042:. 1027:^ 928:. 924:. 912:^ 875:^ 841:. 779:. 762:. 751:. 735:^ 717:^ 699:25 697:. 693:. 632:. 593:. 581:25 579:. 575:. 487:. 458:. 411:. 375:, 368:. 246:" 94:, 71:, 1970:e 1963:t 1956:v 1379:e 1372:t 1365:v 1317:. 1281:. 1231:. 1206:. 1181:. 1170:: 1151:. 1124:. 1099:. 1081:. 1054:: 1021:. 996:. 940:. 897:. 852:. 790:. 711:. 705:: 620:. 601:. 587:: 566:. 547:. 242:" 63:) 59:( 20:)

Index

Edgar Codd

Fortuneswell
Dorset
Williams Island
Aventura, Florida
Exeter College, Oxford
University of Michigan
Alpha language
Database normalization
OLAP
Relational model
Codd's cellular automaton
Codd's theorem
Codd's 12 rules
Boyce–Codd normal form
Turing Award
Computer Science
University of Oxford
University of Michigan
IBM
Thesis
Propagation, Computation, and Construction in Two-dimensional cellular spaces
Doctoral advisor
John Henry Holland
computer scientist
IBM
relational model
database
relational databases

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