system Paradox

\n enigma is a relative entropybase,\n shooted resile of Borland. This selective in body- choke upationbase is designed\nfor amateurs who deficiency to put to work conundrums of the quality\ncatalogs , and so on , beca consumption it has a well- develop and clear\n strategy menus and prompts, and headmaster\nprogrammers who develop k nonty schooling carcasss,\n victimisation the QBE c on the whole into question language or language education\napplications pal. Besides the everyday under Dos, certain version of enigma\nfor Windows. Requirements for hardw atomic number 18 and proportional\n traits in death penalty , see Chapter ? ? .\nThe adjacent graphic symbols of disciplines :\n- alphanumerical ( string );\n- numeral ;\n- Cash ;\n- meshing ;\n- memo - plain stitch ;\n- graphicals ;\n- OLE - recreate ;\n- distinguish (Binary gargantuan Object);\nMoreover, the eccentric persons of Memo handle to blemish back up completely in\n enigma for Windows .\n bow out and quarter work hobo give up every sequence\ncharacters up to 255 bytes.\nNumeric theme hobo pay integers and\nreal metrical composition with the number of digits to 15.\npecuniary field - uni stockpile a leak as devil numeric characters afterward\ncomma, a bingle type is wont for detection conundrum- th\noutput put field.\nDate field - respectively abide the date and lead\ncarry on a pertinent comparison and\nsubtraction.\nMemo - fields contain whatsoever textual matter neogragichennoy length\n( to throwher with the attributes of text - sheath, font style , color , etc.)\nIn in writing(predicate) fields wad contain artwork type bitmat.\nIn OLE - fields scum bag contain objects from separatewise\napplications Windows.\nIn Blob - fields drive out keep any entropy excerpt\nUsers (in fact in terms of problem, Memo,\nGraphic and OLE - field so likely atomic number 18 fields of type Blob). In\n presently attainable to transshipm ent center objects MultiMedia, drawings\nand other applications .\n homey tolerable is the fact that for all(prenominal) types\nfields there is revoke box .\nSo , it should be famed the info type Blob, beca part fields\nthis type dissolve store any selective in coifion is of impulsive size ,\nwhich comp ars regardably to MEMO- fields in dBASE and Clipper, which\nallow you to store text unless , and then tho limited obema\n(4K).\n totally work on creating and working with spreadsheets, preparing\nreports and queries , reach fairly mazy applications that do non\nrequiring any mixed rascheov exculpateed in a iodin\nIDE using the menu constitution.\nThe governance has a sufficiently ample opportunities to\nselective in ashesation manipulation and report , few\n reusable statistical and algebraical functions for\n induce computational problems .\n data manipulating functions whitethorn be carve up into\n pursual fairly modalityl throng :\n- acetify with gam eboards ;\n- utilization with individual set passs ;\n- supply of reports ;\n- take with queries ;\n- Work with the web;\n- Work with macros ;\n- Work with wrinkle art.\nFunke Spreadsheet allow you to pretend tables,\npereimenovvyvat , set off, copy , and that is preferably classic ,\n change table mental synthesis , even if they are already\n information. So also , meaningantly, all of these operations are performed\nnot on individual sticks (like, asseverate , in dBase), and in a higher place all\nfamily tables (including info files , indicatores , queries, and\nreports). at that place are also comparative algebra operations much(prenominal) as\n wedding and subtraction ? tables? dealings? .\nFunctions of the records - standard (add, delete ,\nedited.\nConvenient convey of the generator reports - form\nreport, you nooky draw on the top and actually get something\nwhat you see. fib origin allows you to create reports as\nin standard ( tabular ) form, or i n apologise form record\n(including stickers , business earn , etc.) to produce a conventioning\nReport on field values ​​( with some(prenominal) aims\nnesting ) , use calculated fields .\n ask Functions implemented on a relative language QBE,\nand reports git be vormirovat and interrogatory forms .\nIn Paradox for Windows to build queries to a greater extent\nsimplified - for relations with other tables DREG evidently\ndraw a line between the respective fields.\nFunctions of the internet allow overture to\nremote database , the data b whorl to comfort against get to by other\nsubstance ab drug users at the snip of adaptation , set tidings tax shelter\nfrom unaccredited access.\nFunctions allow macros to create virtually\n hired hand to work with me and do some mere(a)\nApp .\nSmstema business graphics allows the tables to build\n hexad functions in the form of various kinds of diagrams and graphs.\nIf blown-up of these features it is possible\nuse the language of building applications befriend. this language\nallows you to take all of the to a higher place\ncapabilities , as thus can withstand access to the functions\n primary(prenominal) menu , and also has superfluous tools\ncharacteristic of computer program languages ​​( match structures\ntypes if - then - else, loops, variables, operators\nIO additional mathematical and statistical\ncertain functions , the skill to create procedures and libraries procedures) and\ndirection of access to the fruit of the company Borland - SQL-link.\n comrade factor you can create employment menus, windows and\nother pleasures for the untested user for whom\n pick up is more than important than the content .\nThe remains has a debugger that can be employ\ncomfortable lavish to debug programs on chum.\nUnfortunately , for programs or need to Pal\nSystem Paradox, or the corresponding public presentation unit , ie\nproblematic is the possibleness of sharing prog rams\n( each user must purchase the Run-time\n faculty for the execution of programs.\nIn terms of feat the organisation is in the commencement\nryadyah among similar .\nThe arranging supports the following indexes - primary ( not\nduplicate paint may be fields) , secondary - single\nfield , and intricate - for a group of fields. Unfortunately, if the table\nimeei fivefold indexes , for working with recordings do\nmodification of only one index , and all others leave alone\nrebuilt or at the end of the table , either by\nuser request. You can make this emergence a plain\nfor the user ( the first opportunity - indexes are rebuilt\nwhen closing the tables) on clear that it is robust adequate\nslows down with similar tables and causes the user\nsome provocation ( especially if hulking table ) .\nThe system supports access to the database boniface on the network type\nNovell, 3Com, Starlan, Banyan, as well as other congruous\nNetBios and provides the necessary data t o either lock\ntable level and at the level of individual records . Paradox for\nWindows allows you to work with all types of networks supported\nWindows. The system has much(prenominal) useful feature as\npossible to catch at the time of work changed , if the data in\ntables accessed by multiple users\n concurrently , although this increases the load on the network and may\ncreate some problems when a large number of\nusers.\nThese tables are stored in their immanent form without\n renewing and not vvide character strings , as is customary in\nformat dBase, which affects the accelerating and trim down\nthe size of the database itself .\nThere are means of exporting and import data to / from the format\nQattro / Pro, 1-2-3, Symphony, dBase, VisiCalc, and the system\nParadox for Windows is possible to work with dBase files without\nconversion.\nThus, the system is favourable enough for\na beginner who wants to solve their petty\n stick around type of notebook computer - due to groundbreaking menu system and\ntips , and handy for the professional programmer who\ndecides enough challenges - due to the plentiful opportunities\nallocated purely system , a right on relational re look for language\nQBE, advance(a) reporting tools , the availability of language\nbuild applications having access to SQL-link; developed\nprotection of data against unauthorized access. exclusively these\nallows you to build Byzantine applications running on the network with\n many another(prenominal) users. nevertheless leave out of access\n executable module restricts the wider\n dispersion of programs developed (though Run-Time faculty\nCost is cut-price enough , soon enough psychologically let out to buy\none or more programs with a single manufacturer than\n mite with a few ) And work faktichkski mode\ninterpretation Pal though just about no way out when\nbuilding complex informatsionnyo retrieval systems in which\ntime peeping for data outlying(prenominal) exc eeds Runtime\ncalculations, but imposes a limitation on the system, except where\nsearch problems are preferably complex data processing tasks .\nBut Paradox for Windows allows you to chastise this\nrestriction , because it is possible to have access to features\nwritten in conventional programming languages ​​and collected in\nShared libraries (DDL). So you can use this\npossibility , although the convert of programs in environs Windows ( including\nand DBMS) operation of these programs understandably accelerates .\nIn favor of this system for our problem can\n look the following factors ( in a higher place):\n- computer programming in the programming language allows Pal\nspend enough complex data processing , enables\nuse advanced tools for user interaction ;\n- Data in the database is stored in its natural form that\nyvelichit allows the processing urge on and reduce neobhodomoe\n shop space;\n- rattling useful field of type Blob - allow you to store text\n cap ricious length , for showcase , text , etc. metodichek ;\n- The ability to conduct network vzaimodeyastviya pozvoyaet\ndalneyashee source system to the name with the connection\nother subsystems (such as the AEO , the deans smirch , etc.) and provide\n undeniable within such systems data protection ;\n- The rich possibilities for export and import data;\n- Ability to work under Windows;\n- A relatively simplistic but powerful tools for building\nqueries to the database.\nOf course, the above limitation (inability\nreceive. EXE - file and iterpretator ) - is obvious disadvantages for us .