Re: What are schemas? - Mailing list pgsql-novice
From | Vijay Deval |
---|---|
Subject | Re: What are schemas? |
Date | |
Msg-id | 3CDDD006.401241C6@giaspn01.vsnl.net.in Whole thread Raw |
In response to | What are schemas? (Francisco Reyes <lists@natserv.com>) |
List | pgsql-novice |
Francisco Reyes wrote: > Saw some recent discussions about schemas (hacker email sent to another > list I read). > > What are schemas? > I have a general/vague idea, but would like to better understand it. I have created a schema for my electroplating jobshop. "Fundamentals of Database Systems" by Elmasri and Navathe was used as reference. The diagram is in xfig. If you find that interesting, and would like to get details, I would be glad to write a note about it. It will be a bit long. "Beginning Databases with PostgreSQL" by Stones and Mathews also gives information on schema. Vijay #FIG 3.2 Landscape Center Inches A4 100.00 Single -2 1200 2 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 772 2700 337 150 435 2550 1110 2850 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 532 2017 427 142 105 1875 960 2160 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 493 1698 345 135 148 1563 838 1833 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 504 1353 360 150 144 1203 864 1503 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 1475 1693 300 120 1175 1573 1775 1813 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 1395 2325 195 120 1200 2205 1590 2445 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 1139 1010 307 112 832 898 1447 1123 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 2077 1354 442 127 1635 1227 2520 1482 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 1470 720 315 135 1155 585 1785 855 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 2316 703 285 105 2031 598 2601 808 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 2662 1057 307 142 2355 915 2970 1200 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 3105 750 210 105 2895 645 3315 855 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 3382 1057 247 112 3135 945 3630 1170 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 3412 1395 202 90 3210 1305 3615 1485 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 3900 1672 480 142 3420 1530 4380 1815 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 3757 742 262 127 3495 615 4020 870 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 4185 1005 315 120 3870 885 4500 1125 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 4560 1297 360 127 4200 1170 4920 1425 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 5767 1905 247 135 5520 1770 6015 2040 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 5985 1590 345 150 5640 1440 6330 1740 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 6277 1290 232 120 6045 1170 6510 1410 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 6495 855 285 120 6210 735 6780 975 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 7110 825 300 135 6810 690 7410 960 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 7365 1147 300 142 7065 1005 7665 1290 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 7612 1455 277 120 7335 1335 7890 1575 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 7785 1747 180 97 7605 1650 7965 1845 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 9525 1687 600 187 8925 1500 10125 1875 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 9907 1230 382 105 9525 1125 10290 1335 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 10065 862 240 97 9825 765 10305 960 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 10260 600 195 120 10065 480 10455 720 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 10770 930 300 150 10470 780 11070 1080 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 11152 1290 262 135 10890 1155 11415 1425 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 10965 4492 285 142 10680 4350 11250 4635 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 11647 4777 307 112 11340 4665 11955 4890 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 11572 5077 217 97 11355 4980 11790 5175 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 11512 5392 232 97 11280 5295 11745 5490 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 10987 7350 337 150 10650 7200 11325 7500 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 11557 6982 262 112 11295 6870 11820 7095 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 11782 7297 262 127 11520 7170 12045 7425 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 11767 7590 187 105 11580 7485 11955 7695 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 11805 7897 210 97 11595 7800 12015 7995 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 11842 8190 262 120 11580 8070 12105 8310 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 11437 8400 262 120 11175 8280 11700 8520 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 1350 3997 225 157 1125 3840 1575 4155 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 787 3997 277 127 510 3870 1065 4125 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 435 4275 300 105 135 4170 735 4380 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 442 4590 277 105 165 4485 720 4695 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 375 4890 285 120 90 4770 660 5010 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 2265 5145 720 180 1545 4965 2985 5325 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 1567 5482 262 127 1305 5355 1830 5610 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 1185 5797 435 142 750 5655 1620 5940 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 795 6157 195 127 600 6030 990 6285 1 2 0 1 0 7 100 0 -1 0.000 1 0.0000 1147 6480 397 150 750 6330 1545 6630 1 2 1 1 0 7 100 0 -1 4.000 1 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135 360 6720 5760 send\001 4 0 0 100 0 0 12 0.0000 4 180 1110 6390 6180 and "compute"\001 4 0 0 100 0 0 12 0.0000 4 135 1095 6390 5985 data to outmat\001 4 0 0 100 0 0 12 0.0000 4 135 510 8565 6105 reduce\001 4 0 0 100 0 0 12 0.0000 4 180 810 8400 6360 balance by\001 4 0 0 100 0 0 12 0.0000 4 135 660 8400 6585 "amt"\001 4 0 0 100 0 0 12 0.0000 4 105 510 5865 7530 amt \001 4 0 0 100 0 2 12 0.0000 4 165 840 6480 7380 billno,trnm\001 4 0 0 100 0 0 12 0.0000 4 135 555 1620 7590 collate\001 4 0 0 100 0 0 12 0.0000 4 180 990 1425 7815 data for easy\001 4 0 0 100 0 0 12 0.0000 4 135 1035 1290 8010 reference\001 4 0 0 100 0 2 16 0.0000 4 165 1170 3225 8025 LTTRANS\001 4 0 0 100 0 0 12 0.0000 4 150 480 3255 7410 agrate\001 4 0 0 100 0 0 12 0.0000 4 135 360 3540 6735 pono\001 4 0 0 100 0 0 12 0.0000 4 180 510 4155 6765 podate\001 4 0 0 100 0 0 12 0.0000 4 180 510 4245 7080 agdate\001 4 0 0 100 0 0 12 0.0000 4 135 525 4515 7440 remark\001 4 0 0 100 0 0 12 0.0000 4 180 1725 2835 8400 agused eqcu 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pgsql-novice by date: