Article View: borland.public.vdbase.data.sql
Article #1558Re: SQL vs. VDB or VDB Client / Server
From: Joe Yuzamas
Date: Wed, 03 Dec 1997 00:00
Date: Wed, 03 Dec 1997 00:00
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4201 bytes
Greg Some where along the line, people have lost track of what SQL is. 'SQL' is being used for anything connected with a database. SQL stands for "STANDARD QUERY LANGUAGE". It has nothing to do with servers, databases or development languages such as VDB. It is simply an interface to get data from a data source to an application. It does not require a file server, a network or even a DBMS (MS SQL SERVER, ORACLE). Many development languages now allow imbedded SQL commands. SQL commands can be used to access local DBF files or DBF files located on a file server via the net, but in either case NO DBMS SYSTEM IS REQUIRED as long as the server supports DBF formated files. No mid ware, no other support software is required. If the server does not support DBF files now a DBMS is required. If there are requirments that require DBMS funtions such as pre-triggers, ect, you will need a DBMS. I hope this may stop the misuse of the letters SQL. -- Joe < jyuzamas@wrdiss1.robins.af.mil or jyuzamas@sprynet.com > Greg Hill <ghill@n2.net> wrote in article <01bcd473$2448a740$828471cf@greg>... > I'm getting ready to set up a wan connection between two offices, I'm not > sure how much band width I'm going to buy yet but I'm guessing around > 64mbs. I just did some testing using Visual dBASE 5.5 across a dial up > connection using Windows 95 on both sides and connecting using 28.8 modems > on both sides. I ran the DBASEWIN.EXE and the program files locally but > opened the tables on the host computer and it took about 5 minutes just to > open up 10 tables and set up the relationships no filters. Once the tables > were opened I brought the form up and it took about 5 minutes, once the > form was up navigation from one record to the next took about the count of > 8 to 10 seconds (no filters were active). I executed an onclick event that > does a couple seeks and replaces, and that took about 5 minutes. > > I keep hearing this SQL stuff. Things like it brings down the amount of > traffic across the wire, it is network aware you make a request and the > work is done at the Server using the servers memory/cpu and when it is done > it sends back only the requested information. I'm not sure how true all > of this is and also how it applies to my particular applications. I'm > running an application that shows appointments for the day and there are 4 > users changing the status of each record that is scrolled to plus there > will be about 5 other users that will be looking at data pulling up records > for odd reasons, reports will be pulled all day long. This database will > contain about 25000 records total. There is about 125 appointments per day > and all 125 records require some kind of updating by at least 4 > Users/Dispatchers throughout the day. > Should I be considering SQL and if I do how could it help if my app demands > constant refreshes. > If I face the reality of my situation, I think I'm up for a rewrite on this > app I think I would have to write something that would download the data to > the local PC and keep synchronizing it at certain breaking points during > the day. Which means the end-users and the Boss who wants dynamic reports > will be a little disappointed. > I think one of the reasons they wanted to put this WAN up is so that > they did not have to pull separate reports and dial up other locations to > get reports, they wanted reports that reflected all offices. Later they > will be adding another location so the demand is there for a WAN. > > I know this is rather long but it is the only way I could summarize all of > it. > Any suggestions appreciated. > Thanks, Greg > > >
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: ff5a1,c5b0ffe53f54215c,start X-Google-Attributes: gidff5a1,public From: "Joe Yuzamas" <jyuzamas@wrdiss1.robins.af.mil> Subject: Re: SQL vs. VDB or VDB Client / Server Date: 1997/12/03 Message-ID: <01bcfa71$bb013c00$1030f489@jyuzamas.robins.af.mil> X-Deja-AN: 294942991 References: <01bcd473$2448a740$828471cf@greg> Organization: U.S. Air Force Newsgroups: borland.public.vdbase.data.sql