Pakeitimai tarp versijų 1 ir 2
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⇤ ← Versija 1 nuo 2012-10-15 11:14:17
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| Pašalinimai yra pažymėti taip. | Pridėjimai yra pažymėti taip. |
| Eilutė 11: | Eilutė 11: |
| . * lReliacinės duomenų bazių valdymo sistemos, kuri remiasi Edgaro Kodo (Edgar F. Codd) aprašytu reliaciniu modeliu, kurio pagrindinis elementas yra reliacinė lentelė. * lPirmoji beveik pilnai reliacinė DBVS – 1978 metais išleista Multics Relational Data Store. |
. * lReliacinės duomenų bazių valdymo sistemos, kuri remiasi Edgaro Kodo (Edgar F. Codd) aprašytu reliaciniu modeliu, kurio pagrindinis elementas yra reliacinė lentelė. * lPirmoji beveik pilnai reliacinė DBVS – 1978 metais išleista Multics Relational Data Store. |
| Eilutė 14: | Eilutė 14: |
| * Dauguma šiuolaikinių firmų populiariųjų RDBVS palaiko didžiają dalį E. Kodo suformuluotų taisyklių: Oracle, Microsoft SQL Server, IBM DB2, Microsoft Access, MySQL, PostgreSQL, tačiau jomis neapsiriboja. Kiekvienas gamintojas siūlo savus plėtinius ir papildymus, todėl perkeliant duomenų bazę į kitą programą tenka papildomai dirbti. | * Dauguma šiuolaikinių firmų populiariųjų RDBVS palaiko didžiają dalį E. Kodo suformuluotų taisyklių: Oracle, Microsoft SQL Server, IBM DB2, Microsoft Access, MySQL, PostgreSQL, tačiau jomis neapsiriboja. Kiekvienas gamintojas siūlo savus plėtinius ir papildymus, todėl perkeliant duomenų bazę į kitą programą tenka papildomai dirbti. '''Reclialusis modulis (''''''reliacinė lentelė)''' |
| Eilutė 16: | Eilutė 17: |
'''Reclialusis modulis (''''''reliacinė lentelė)<<BR>>''' 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R0bbdR44luO1VQ5EOakWM4WVwKGxyBYROAgcJ+THYqOzm2hOtcAhf5ZcgMPLJMWlDvFJim8FjuBUfzxCvGs4osUsu135anx7q68I/niP10TZZjXXj5YCR7Kj4i0EDgLHieQf/mLMNate4FjCj6XsT9g6WHRQbX/odPxAw6dUkuc3Mp9SSS5m4XZFPw2rYelTKoljGOIchZaJpBg4llRHxTsIHASOE9QH0muB46cxNHLMVcZcg40icNDVTlAfSAQOh6GRY64y5hpsFIGDrnaC+kAicDgMjRxzlTHXYKMIHHS1E9QHEoHDYWjkmKuMuQYbReCgq52gPpAIHA5DI8dcZcw12CgCB13tBPWBROBwGBo55ipjrsFGnQSOPwAQrgeOb7cUgC4c4SDbnqA+kDjC4TA0csxVxlyDjSJw0NVOUB9IBA6HoZFjrjLmGmwUgYOudoL6QCJwOAyNHHOVMddgowgcdLUT1AcSgcNhaOSYq4y5BhtF4KCrnaA+kAgcDkMjx1xlzDXYKAIHXe3EX3iHKu5i1LRXAsc89on7c711i9PX72N+/409/447fj02ODTWIXZMqq44stX67t52dRXgbrGfIXAQOE4k6qP1pth4wGtHOBJd5b3e8/pCez8ROPwNmobbMofGOsT2SeMoxOzf4Vf8V8XmZHclqiJwEDhORPUhbjTtxVMqUW95s/toXGjzq9R9C5fGOsRSldlb7m2BlhWewPEMAgeB40RQn3nsLcx4uMur13AEAcNbbuR5uvUx89j3w9DvX7sHDIN43vHd7XXnse+GMTh4LxeP4xfV7LuXAkewjd6D9y+M1+FaZZJRScu7l7+/P1GdvZ3J/SL20DiGewBlBA4Cxwm/PrwFaN2rgcNfU6ZgvQwPrXtXfRwPmMc+PjZ/ZF/x4+NJxwPFL616gKB4SsX96mAbxaPnse/H2X4dspUJW57KZTrevWQSUnK/xBuk5syQegQOAscJrz7kjea9HDiCt/vpiXn/gVyCwoMhwYyfeZZ7gLfQ3tJrX7xodGutbGD0OJN1iMUXjfbjFMwd6SuKv+TslEpc9uShKpwgcBA4Tsj6MK7weuA4uk2YN7ylOlxH/be/csaPlnbZLxML7SIPjlfsv5dO/Ce3cQseMhwYrkMsNalG125oOiiQ3pWl/eI/1MalNd9H4CBwnJD1YVjhjcCxTc6J2VyeXomWzPN39v7rB/9PPrLqm/zzwJHcxmWZhn6c9rxhvw6xxKQaRChlb1wSu/Jkv3CE4x0EDgLHCVEfhhXe+8Nf89h3fe/3nuAUefpMQenahfSaGn8zOD3xZOBIbmPwhf06xMQ1HNFW6rlwQxC7MlGi1H5JXi+DEwQOAscJUR8OcODdvzQ6DdFh/OOA9XGCP3NMux/H1KczousVlszq+/SnVIrbuDXIe3tsug6xY9IofvLjgZM7F+0N3grtCpffL/PYd8MwPFHNH0LgIHCcoD6Q3gwcv4ihkWOuMq83mMO97yBw2BsbD6M+kAgcDkMjx1xlCBzPIHDYGxsPoz6QCBwOQyPHXGUIHM8gcNgbGw+jPpAIHA5DI8dcZcw12CgCB13tBPWBROBwGBo55ipjrsFGETjoaieoDyQCh8PQyDFXGXMNNuokcPwBgHA9cABAoDRpvJZebPoj2xZRH0jlKQMA3tPEzMKCWkZ9IBE4ANyhiZmFBbWM+kAicAC4QxMzCwtqGfWBROAAcIcmZhYW1DLqA4nAAeAOTcwsLKhlYX3S94LacBOjn0fgAHCHJmYWAkeZX581YqT+pC+3aG4DgQPAHZqYWQgcZa4+692a+2FI3UOAuNEKAgeAOzQxsxA4yo7AMU3zkr5p0Tz2nE1pBIFjVeUvHQFwmhgqBI6y0jUc+W/hV7GCri7WgXIBFzUxVAgcZeeBg7zRElbQFYEDqKuJoULgKDsNHOSNprCCrggcQF1NDBUCR9lp4JgGrt9oCCvoisAB1NXEUCFwlJ0FDg5wtIUVdEXgAOpqYqgQOMrOAgcHONrCCroicAB1NTFUCBxl1AcSK+iKwAHU1cRQYUEtoz6QWEFXBA6griaGCgtqGfWBxAq6InAAdTUxVFhQy6gPJFbQFYEDqKuJocKCWkZ9ILGCrggcQF1NDBUW1DLqA4kVdEXgAOrq/gBAYAVdETiAupoYKn+8gy+iPpBYQVcEDqCuJoYKC2oZ9YHECroicAB1NTFUWFDLqA8kVtAVgQOoq4mhwoJaRn0gsYKuCBxAXU0MFRbUMuoDiRV0ReAA6urWW3XFNwOdhsQ3z7x+l69HbkS6Lajz2HeB++5JprQUSUfgcCXiZm0NYwVdETiAurplSYaLt/KG1tuKisDhb9M03La0Ki1F0h44jnJwQ/qWsYKuCBxAXetQieLFe3lD6yqbDRw3LqxKS5GUqo+l9qMuVtAVgQOoaxsqQcDwVptpOE5BrI+Zx74fhn7/2j1gGMTzju9urzuPfTeMwTF7ucgdv6jyUncpcASb6T14/8J+KZIIHJBYQVcEDqCufah4iWMKFkuxJPfjHFz1cTxgHvv4kPw89uJ7++u6Jx0PFL+09mJXPKXifnuwmeLR89j34/wTpUiSp1RE+zmp0ihW0BWBA6jLDRX/vX56kdt/cKyc8cEQ94AovshnuQd4q+xdK9yLF41uDZZtjB5ntRRJ8UWj/ThxFUezWEFXBA6grmOouPUuzBveOh0uonLp9BfUaF2XS29ilV3kiYS6S13+lIqQ3MwteMhwYLsUSamPxXJKpV2soCsCB1CXGCrrghesyt4qmnrXfv623n/94P/JR9Z+h38eOJKbuSzT0I/Tnjd+ohRJicDBx1Qaxgq6InAAdcmhMo991/f+QhNct5A+TVC6cCG9oMbfDM5NPBw4kpsZfPETpUgS13DE24rmsIKuCBxAXf5QmYboGP5xSuA4r584CrI+YEx9NCO6WGHJLL1f+JRKcTO3NnmfVbFeiqTjCEfUUjSIFXRF4ADqamKo8Ke7y6gPJFbQFYEDqKuJocKCWkZ9ILGCrggcQF1NDBUW1DLqA4kVdEXgAOpqYqiwoJZRH0isoCsCB1BXE0OFBbWM+kBiBV0ROIC6mhgqLKhl1AcSK+iKwAHU1QFA4NvzkgoX60C5gIsYKgCQQOAA6mKoAEACgQOoi6ECAAkEDqAuhgoAJBA4gLoYKgCQQOAA6mKoAEACgQOoi6ECAAkEDqAuhgqQxd+raBmBA6iLoQJkldcSVprfRuAA6mKoAFkEjpYROIC6GCpAFoGjZQQOoC6GCpBF4GgZgQOoq/vn3/++3QZAKQJHywgcQF0MFSCLwNEyAgdQF0MFyCJwtIzAAdTFUAGyCBwtI3AAdTFUgCwCR8sIHEBdDBUgi8DRMgIHUBdDBcgicLSMwAHUxVABsggcLSNwAHUxVIAsAkfLCBxAXQwVIIvA0TICB1AXQwXIInC0jMAB1MVQAbIIHC0jcAB1MVSALAJHywgcQF0MFSCLwNEyAgdQF0MFyCJwtIzAAdTFUAGyCBwtI3AAdTFUgCwCR8sIHEBdDBUgi8DRMgIHUBdDBcgicLSMwAHUxVABsggc7ehS3n4ifQOIMSqALAJHO+ruTfoGEGNUAFkEjnYQOIC7MSqALAJHU2rtUDoGkMTAALIIHE0hcAC3YmAAWQSOphA4gFsxMIAsAkdTCBzArRgYQBaBoykEDuBWDAwgi8DRms/3Kb0CyGFsAFkEjtYQOID7MDaALAJHawgcwH0YG0AWgaM1BA7gPowNIIvA0RoCB3AfxgaQReBo0Ce7lS4BFDA8gCwCR4MIHMBNGB5AFoGjQQQO4CYMDyCLwNEgAgdwE4YHkEXgaBCBA7gJwwPIInA0iMAB3IThAWQRONr03p6lPwBljBAgi8DRJgIHcAdGCJBF4GgTgQO4AyMEOHSRWg+GIQQO4A6MEODABYNYCBzAPRghwIHAgdWre5O9D5xikAAe3t1iIXAAN2CQAB4CBxYCB3ADBgngIXBgIXAAN2CQAB4CBxYCB3ADBgkQYrHB8spupQMAVzBOgBCBAwuBA6iNcQKECBxYCBxAbYwTIETgwELgAGpjnAAhAgcWAgdQG+MESGCxwXJt59IBgIsYKkACgQMLgQOoiqECJBA4sBA4gKoYKkACgQMLgQOoiqECJBA4sBA4gKoYKkAaiw2Ws11MBwCuY7QAaQQOLAQOoB5GC5BG4MBC4ADqYbQAaQQOLAQOoB5GC5DFYgP6AFALowXIYrHBkt/RdADgJQwYIIvAgYXAAVTCgAGyCBxYCBxAJQwYIIvAgYXAAVTCgAFKWGxAHwCqYMAAJSw2WFK7mw4AvIoxA5QQOLAQOIAaGDNACYEDC4EDqIExA5xgsQF9APgcYwY4wWID+gDwOcYMcILFBvQB4HOMGeAEiw0Wf6fTAYA3MGyAEwQOLAQO4GMMG+Aciw3oA8CHGDbAORYb0AeADzFsgHMsNqAPAB9i2ADnWGyw7LueDgC8h5EDnCNwYCFwAJ9h5ACXsNiAPgB8gpEDXMJiA/oA8AlGDnAJiw3oA8AnGDnAJSw2WOgAwAcYPMBVLDagDwBvY/AAV7HYgD4AvI3BA1zFYgMAb2MCBQAAtyNwAACA2xE4AADA7QgcqK8DAHzJt1eALL0tg12aezwA/DDN06/elsEuzT0eAH6Y5ulXb8tgl+YeDwA/TPP0q7dlsEtzjweAH6Z5+tXbMtiluccDwA/TPP3qbRns0tzjAeCHaZ5+9bYMdmnu8QDwwzRPv3pbBrs09/jfMA2ZD+AP03ONmMe+67qu68fZ2IsDv0vz9Ku3ZbBLc4//CfPYb8liHnu3Jh/fvfwq/TjL15jH/sXMMg03RoJbXxz4TZqnX70tg12ae/wvmMdx2v/XizV5ml47vrEdRfhgUf8kEszjUH5q9OLT8PAxHMAezdOv3pbBLs09/qf4eeN57+eNCy3n+AbwBs3Tr96WwS7NPf6XhGdAtiMWw7QERwP2CyK8oxnHN48n+AcQjusoxuTiv5+TiV6wH2f31TAtwbEUeQFKvoXFFweQoXn61dsy2KW5x/+Q1BUX6zI9Dd0wDGJ9Py7REBdruP+mLgKRL368QuJ3bV+kfssyDd0w7Ycq5MP9oxeZFp68OIAEzdOv3pbBLs09/odMQzJvDIO4dtQLJfsynw8Q4pGd/yLxpRPiu8nfsuWNaVh/kMsb6eeevziAFM3Tr96WwS7NPf53JPJGFCWOr8UpltQTF5kIggec5o3kb1nDQS8+TiMOpHQyeySee/7iAJI0T796Wwa7NPf4n5HJG963jgsfTo9XZPNG7qOy09AN0zzPmd8ShJ9c3sg/t/ziANI0T796Wwa7NPf4H5GMAWHe8LPDvtDLp4bXW0zjOMsnuStJo0/crpFgGqc5/VuiizD6cRqH7dcPkzt/k3zu6YsDyNA8/eptGezS3OPtE+/5/c9sxHnDe/DxyNQnPtZocZxzcQcV5A/C15UHLUofMpGP3l48dYzDf7nCiwPI0Tz96m0Z7NLc4wHgh2mefvW2DHZp7vEA8MM0T796Wwa7NPd4AF/BtPAMzXXW2zLY1XXdHwAITAvPIHCgLZp7fC1/f3/fboJS5ipjrsFGtTAtaKC5znpbBrs09/haWKVyzFXGXIONamFa0EBznfW2DHZp7vG1sErlmKuMuQYb1cK0oIHmOuttGezS3ONrYZXKMVcZcw02qoVpQQPNddbbMlhz/GkozT2+FlapHHOVMddgo1qYFjTQXGe9LYNdXdeFfy5ylfreZeuTtdxQY1+ljr/K+fifw0wUZBq+//c4/fVb1qfKvqvfDaJd6V48/k5S9ap/so2njfnaONoXQup8LwIH2rL2+ES6+GjGUBw4wr8Q/sySrz9wyBbWatoDgcO7zVx//ussLIT7vWsULITU+V4EDrRl6/HRiPtswjAROJ5spa6COCJw2LihvL8rh8HdTHca1i/NL4Q6eooXOKjzbQgcaMve44Px5w9R7x5k7rvrY/reHV91DxtG79XST3/uRl+XArGwut0AAA8jSURBVEeqkf4iLL76sCDy5MVXj3GEgSN1U9t0BbwSBN3GVUAWuM7uDnblOGwvNo99VORCC7fb3Jb3fqIS21orX3G+0NVlx0sfSdobE7T56++8qfO9OgIHmuJ6fLz67uNYLjNySAenJMSPtuEsRnv0dPfrHhjrxVMqpUbG33a3af+0IPIp38sc3jUc0eFz9810BbwkIe9dG2TKYaq3u4NdOY29a9D6ld+STAv7cb7Uw6WtOiJIyl1b7EWnC6FsTCIFfz9wUOebEDjQlqPHh+tj8hCkfNfhTxneV/EADp/uLcE3u3zRaGYbo5RRevBpQRIHj76WOOIPfXi3u3ffCCqQSm7HG8jwVvc1d3eYHaf1rfc89u5t65UWDkMfNyb5Tt0vjL9zxaJ4vWPEC6HfGF0LIXW+F4EDbRE93g3XYBHc1qDo+GghYsTveuOne0dFv3GEQ8o1cpmG9bv7vx8XxNvsRza/IPMpU+8a4rgC4fR8IXDU2t3hrlxXwGUa/KMnJy0MW5Hd+0IuTV7p6sWFMGiMroWQOt+rI3CgKbLHi7czYd7Yx2L+dEDxDX3q6d5vvXWwnweOQiPnsd+OIqcODL9bkK9euXHI/VmLaDZOVOClIxyHz3Z3tCvnsXeXGFx+590NU7TfSl00/n7ynfeljhEvhH5jdC2E1PleBA60xevx60gevLwhV4j9XWrqDIL8cntHEZ7ul08/vn3/SYWLgSO1jeIb/iT4fkGy0+IXHIHDywFBq6IKJI5UJStw/KjW7o53pShtao3JtzBeHJfE3nfkLoyP3JS6uveYzNU8YV/RshBS53sRONAWv8e7Y4/e2BNHJNcr1MWIlUuHO2ruX8eeebo4xn7z+/0Lp1RyjTw2Sz7vw4JkDjh/gTzC4Z/r8coUV+D0swniMdEplQ92d7wrRdsyOSnXwmgJS+79xX/iOATbMF/o6nJgjclVOdWY7UyGksBBne/QETjQFM09vhb+HnaOucp8r8GazoTd73vTAnXWQm/LYJfmHl+LuWX1MeYqQ+B4BoHjGZqnX70tg12ae3wt5pbVx5irDIHjGQSOZ2iefvW2DHZp7vG1mFtWH2OuMuYabFQL04IGmuust2WwS3OPr4VVKsdcZcw12KgWpgUNNNdZb8tgl+YeXwurVI65yphrsFEtTAsaaK6z3pbBrq7r/gBAYFp4BoEDbdHc42v5421xhrnKmGuwUS1MCxporrPelsEuzT2+FlapHHOVMddgo1qYFjTQXGe9LYNdmnt8LaxSOeYqY67BRrUwLWiguc56Wwa7NPf4WlilcsxVxlyDjWphWtBAc531tgx2ae7xtbBK5ZirjLkGG9XCtKCB5jrrbRnsCnv8PPZfvZ3YHbZVyr87mX9rqI8l66a+mFtl5L3kvLocd59TshVXA4f6yiuneSH8JZrrrLdlsKuxwOFv2jSUMsd7pTBVwMT6PQ3ePTndfTV1bFN2V6KqxEL43N2dG0LgQFuaDhzlrW0xcMhoMQ3ekQ4VG0XgeEa8EM7jSMGrI3CgLaXAcbyn8Raecf/28UZHHpN3C8HxzS+/I7oWOFxz12+4L/txXpZ57Pth6Dvxlt/f3u2VomfFL//takhB4JjH/midVy4RPr7q7+8v3DVLYXes/+vH0d+3OBMthNNA6W5A4EBb8oEjdWx9Hns3zR8/Dx65/lwsUd9erYqnVBIL1NbaKHvJ7BBur3tw+CxXIi3VkPzA4RdIb+CI25bfHVtqPjqqis1QL5wWJhLbLQgcaEs2cCTXG/kWOH1Y261Mes77X7hoNLuxMjokl6rowdnAoaUakhc4gh1qJnBI8b7zHsqpmIuCaWGeZzd+qF9FBA60JRs4vCVm/256NQ3Wcve040j3dyep8xP/YRZJBo5gMc48OPssLdWQZOAIy2MocBR2R/BQLduhXWYh5BBRZQQOtKXruvQaeelNv3ukDBnRjPTtt/fXAkfxQ63Zox0Xj3AI366GJANHtOeMXDRa3h0c4XhLbiEksNVF4EBbuq4Lr2WIrtHwr+GIVtPggfHJl28vsRc+2iB+lgxS4eWfye3NP0tTNSQROBLV0f2x2EQ9E7sjc9kRygqBgwJWROBAW7Yenzzen/mUSvT2XT5uOh6h5nMZ1z5LGX32QZ60jt4nh9sbVSN8lppqSCJwJN+7qrtWcG+wvJ7gfHcMw6Cu9LrlT6lo6Qm/gcCBtmju8bXw97BzzFXm9QZzFuUdx7TgHUAisFWmefrV2zLYpbnH12JuWX2MucoQOJ5xTAviglzKWJ3m6Vdvy2CX5h5fi7ll9THmKkPgeEYL04IGmuust2WwS3OPr8XcsvoYc5Ux12CjWpgWNNBcZ70tg12ae3wtrFI55ipjrsFGtTAtaKC5znpbBrs09/haWKVyzFXGXIONamFa0EBznfW2DHZ1XfcHAALTwjMIHGiL5h5fyx9vizPMVcZcg41qYVrQQHOd9bYMdmnu8bWwSuWYq4y5BhvVwrSggeY6620Z7NLc42thlcoxVxlzDTaqhWlBA8111tsy2KW5x9fCKpVjrjLmGmxUC9OCBprrrLdlsEtzj6+FVSrHXGXMNdioFqYFDTTXWW/LYNfW48UfMFZ4j7EPhatUrT8+eXpTe/W2yhw3lvP3vewVOroDgeMZmhfCX6K5znpbBrtE4PCXyWkoLTIWl1WneuNNVUNKrN/yFu76bg5K4HiG5oXwl2ius96Wwa5s4CivoqaWWAJHTrR+y7iRvmP9dxE4nqF5Ifwlmuust2Ww61rgcMfc12+4L/txXpZ57Pth6PefyuPzcu363qH5UuA4zhrsDZvHvhvG/dtHc+Pt2l4nqkZcNnUL9yaozDz2oqXz2Ktr9tbg3D4KOyrepHkh/CWa66y3ZbCreErFW1cXuSBFa7ZcY7f/HydlxFvlb7xrzgeOoLXDtP10b+Px89R2udcJq+Ge8s2tvsKvTNAJpqHr+3hN/yoROOJ9lOqoeIvmhfCXaK6z3pbBrvOLRr1laF85wyU2Obu7ZdY7UP+8bODIblpy252oCNnAof2NtleZYGO93arlag4ROKJ9lNybeIvmhfCXaK6z3pbBrvwplV2YRZKBI1io4s82HGcXnl+4soHDW5X27+Y2Ld6uk8CxfHerr5CVKV6IomX9lqdUwoInOyreonkh/CWa66y3ZbDrWuAofvgze7QjtUp9423/399ffok6PXjjHhlt13ngWI7XVhk5ZOAoZgorgUNjkS3SvBD+Es111tsy2HUeOOTPkgtweJmkuNQhPknxrcARnOqPzv/713BEi1l2u/LV+PZWXyECR9QDZJvVXD9aChzJjoq3aF4If4nmOuttGey6EDiW8GMp+xO2MwXec+WnPqbjBxo+pZI8v5H5lEpyMQu3K/ppWA1Ln1JJHMMQ5yi0LN7FwLGkOireoXkh/CWa66y3ZbBLc4+vhT/ekGOuMuYabFQL04IGmuust2WwS3OPr4VVKsdcZcw12KgWpgUNNNdZb8tgl+YeXwurVI65yphrsFEtTAsaaK6z3pbBLs09vhZWqRxzlTHXYKNamBY00FxnvS2DXZp7fC2sUjnmKmOuwUa1MC1ooLnOelsGuzT3+FpYpXLMVcZcg41qYVrQQHOd9bYMdnVd9wcAAtPCMwgcaIvmHl/LH2+LM8xVxlyDjWphWtBAc531tgx2ae7xtbBK5ZirjLkGG9XCtKCB5jrrbRns0tzja2GVyjFXGXMNNqqFaUEDzXXW2zLYpbnH18IqlWOuMuYabFQL04IGmuust2WwS3OPr4VVKsdcZcw12KgWpgUNNNdZb8tgV9d121266txT/fX7mN9/Y8+/445fgftu8aWxDrFj/XbFka3Wd/e2q4GDu8V+JrEQJnsIPkPgQFu2Hp8IF+/dUv31hfZ+InD4GzQNt02fGusQ29fvoxCzf4df8V8Vm5PdlajK3UR6+3oaXOi00bONIHCgLXuPj+LFe3lD5XSUX6XuW7g01iGWqszecm8LtKzwBI5n+IFjHnvRF2x0bRsIHGiL6/FBwPBmlWk4zkKsj5nHvh+Gfv/aPWAYxPOO726vO499N4zBoVm5eBy/qOaUdilwBNvoPXj/wngdrlUmuZ68GT+r+/v7E9XZ25ncL2IPjWO4B1DWdd1a1mUJj2/56QMfIXCgLUeP99aUKVgvw0Pr3lUfxwPmsY+PzR8zlPjx8aTjgeKXVn0XVTyl4n51sI3i0fPY9+Nsvw7ZyoQtT+UyHWtMJiEl90u8QWrODKknj3AEV3hpyZ4/gcCBtoge77/dT0/M+w/kEhQeDAlm/Myz3AO8hfaWqezFi0a31soGRo8zWYdYfNFoP05BLktfUfwlZ6dU4rInD1XhhHdKJXwrQgmrIXCgLbLHu+k4zBveUh2uo+kTvOHqHq2+iYV2kQfHK05ql078J7dxCx4yHBiuQyz1oY/o2g1NBwXSu7K0X/yHcv3BNV7gEJFTVfr8AQQOtMXr8evknJjN5emVaMk8f2fvv37w/+Qjq76POg8cyW1clmnox2nPG/brEEsEjiBCKVtdErvyZL9whOMdnf8pFZnoqF9FBA60xe/x89h3fe9PysEp8vSZgtK1C+k1Nf5mcHriycCR3MbgC/t1iIlrOKKt1HPhhiB2ZaJEqf2SvF4GJ4LAseLwUHUEDrQl7PHiA/e74+3NcYI/c0y7H8fUpzOi6xWWzOr79KdUitu4Nch7e2y6DrHjCEfxkx963truDd4K7QqX3y/z2HfDMDxRzR+yTwtHueRIQC0EDrRFc4+vhb+HnWOuMq83mLMo73DTgktz1PAOmqdfvS2DXZp7fC3mltXHmKsMgeMZLUwLGmius96WwS7NPb4Wc8vqY8xVhsDxjBamBQ0011lvy2CX5h5fi7ll9THmKmOuwUa1MC1ooLnOelsGuzT3+FpYpXLMVcZcg41qYVrQQHOd9bYMdmnu8bWwSuWYq4y5BhvVwrSggeY6620Z7Ao/+wgAeMq3V4AsvS0DAAA/g8ABAABuR+AAAAC3I3AAAIDbETgAAMDtCBwAAOB2BA4AAHA7AgcAALgdgQMAANyOwAEAAG5H4AAAALcjcAAAgNsROAAAwO0IHAAA4HYEDgAAcDsCBwAAuB2BAwAA3I7AAQAAbkfgAAAAtyNwAACA2xE4AADA7QgcAADgdgQOAABwOwIHAAC43f/YmJqAQAU2lwAAAABJRU5ErkJggg==||width="503",height="273"}} 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Žodis angliškai:
Relational database management system
Santrumpa:
Žodis lietuviškai:
Reliacinės duomenų bazių valdymo sistemos
Apibrėžimas:
- * lReliacinės duomenų bazių valdymo sistemos, kuri remiasi Edgaro Kodo (Edgar F. Codd) aprašytu reliaciniu modeliu, kurio pagrindinis elementas yra reliacinė lentelė.
- lPirmoji beveik pilnai reliacinė DBVS – 1978 metais išleista Multics Relational Data Store.
- Dauguma šiuolaikinių firmų populiariųjų RDBVS palaiko didžiają dalį E. Kodo suformuluotų taisyklių: Oracle, Microsoft SQL Server, IBM DB2, Microsoft Access, MySQL, PostgreSQL, tačiau jomis neapsiriboja. Kiekvienas gamintojas siūlo savus plėtinius ir papildymus, todėl perkeliant duomenų bazę į kitą programą tenka papildomai dirbti.
Reclialusis modulis (reliacinė lentelė)