Search DaniWeb - surrogate

Surrogate primary key 9 Years Ago by [NOPE]FOREVER 1. What exactly is a surrogate primary key? 2. Is a surrogate primary key just a made up attribute inserted into a table by the database administrator? All I know is that you use a surrogate key when there is no primary key or the natural key may not be a suitable primary key. Re: Surrogate primary key 9 Years Ago by hericles ….e. nothing int the data is unique across rows) a surrogate key needs to be supplied. If you created a id… column using [int auto_increment primary key] then you have a surrogate key because, although the column uniqiuely identifies each row, it… surrogate, natural and candidate keys 9 Years Ago by [NOPE]FOREVER Can somebody please explain exatly what surrogate, natural and candidate keys are and how they differentate from each other? Thankyou Re: surrogate, natural and candidate keys 9 Years Ago by hericles … used as they both come from the data itself. A surrogate key is one that is created for the data to… Com surrogate has stopped working 14 Years Ago by Mikusgrosbergs "Com surrogate has stopped working" ! what can i do ? what is that ? Re: Com surrogate has stopped working 14 Years Ago by caperjack Hi, check this out ,might help [url]http://www.howtogeek.com/howto/windows-vista/fix-for-com-surrogate-has-stopped-working-error-in-vista/[/url] Experimental version: MatrixCaptcha 14 Years Ago by Graphix …length <= (i+1)) { throw 'High surrogate without following low surrogate'; } next = str.charCodeAt(i+1); if…lt;= 0xDFFF) { // Low surrogate if (i === 0) { throw 'Low surrogate without preceding high surrogate'; } prev = str.charCodeAt(… Total noob question 17 Years Ago by claptrap …same as primary key made of single components?) or surrogate key... Could anyone explain the following paragraph (we are…fact & dimension tables is based on surrogate keys, not each surrogate key should have a generalised structure. i.… has a natural key, namely the branchID and surrogate key branchID." I cannot see any difference between… Re: Total noob question 16 Years Ago by matale …same as primary key made of single components?) or surrogate key... Could anyone explain the following paragraph (we are…fact & dimension tables is based on surrogate keys, not each surrogate key should have a generalised structure. i.… has a natural key, namely the branchID and surrogate key branchID." I cannot see any difference between… Re: DB Design Issues 15 Years Ago by tesuji …this, you must invest additional plain programming efforts. 3. Surrogate keys: If a column or set of columns is … many columns sometimes it's cleverer to introduce a surrogate key what is then usual a numeric and auto…-increment key. But attention: Surrogate keys never avoid duplicate data. Therefore, this must be … DB Design Issues 15 Years Ago by varun077 … table for (quoteid, propertyid) and similarly for lineitem properties. 3. Surrogate Numeric Keys - Right now we have text values acting as… PKs. Should we change all of them to numeric surrogate keys to have small sized tables and fast retrieval. But… Cascading updates and Identity keys necessary? 11 Years Ago by zachattack05 … have a SQL database that has many relationships that utilize surrogate keys. These relationships (some of them) have cascading deletes, but… need cascading updates be if you have natural keys or surrogate keys that are not identities? I don't even show… windows vista 14 Years Ago by hemant_rajpoot repeated error message "COM surrogate error" and i lost administrator rights on my admin account and certain softwares as adobe reader not working in adminstrator account whereas working in nprmal user account. Re: windows vista 14 Years Ago by Ancient Dragon [URL="http://lmgtfy.com/?q=COM+surrogate+error"]did you try google[/URL] to find that error message ? Guy Kewney R.I.P - Death of an IT Legend 14 Years Ago by happygeek …. When my own father died, I adopted Guy as my surrogate Dad as we travelled the world together on press trips… ER diagram of auditing database design 13 Years Ago by tammy2512 … am getting a mixed response on whether to use a surrogate key or a natural key. Could you please let me… Design Question 13 Years Ago by MoZo1 … can think of 2 designs: - Normal: I create an autoinc surrogate key for the people, and use joins between trips and… hs_err_pid Java Client-Crash log Help? 10 Years Ago by Tobyjug2222 …; daemon [_thread_blocked, id=10948, stack(0x1a410000,0x1a610000)] 0x1946f800 JavaThread "Surrogate Locker Thread (Concurrent GC)" daemon [_thread_blocked, id=11232, stack… Cannot insert duplicates 4 Years Ago by misstj555 … key? Should I make a BandID that will be a surrogate key and make that the primary key (I would think… Re: Relationship problem with Student activities, comment by the teacher and dependents 13 Years Ago by tesuji … usually learn in database course at college/university surrogate/artifical primary keys those replacing the keys which…many-to-many relationships are not correct. Such surrogate keys should be replaced by natural primary keys … avoided by one-column surrogate keys. This conception usually does not consider that surrogate primary keys almost always… Re: Insertion sort of matrix elements 10 Years Ago by somjit{} …-in-java) for those who are wondering what surrogate pairs are. The accepted answer is short and sweet :) > … in helping them learn more. :) i didn't know about surrogate pairs before your post. thank you . Re: help on error handling in mysql ,in primary key 16 Years Ago by tinamary … column and not get errors, then you should use surrogate key. "surrogate key is the substitution of the primary key"… Re: Database schema for a store 15 Years Ago by tesuji … are properly set up. Usually this cannot be achieved by surrogate keys. Test it! As usual, design data model without composite… many-to-many relationships. Best: replace all of them by surrogate keys having auto-increment attribute. Then try to get the… Re: rounding / or please wait... or something else 15 Years Ago by ArkM … that in platform-independent manner. Probably the simplest progress bar surrogate for console applications is conio.h based class with feedback…) main loop. Try this improvisation: [code=c++] /// Progress indicator console surrogate. /// Place in conticker.h (no dependencies) class ConTicker { public: ConTicker… Re: Some OOP returning of arrays help. 14 Years Ago by KuriYokan …;889848]See what a class of that sort (std::string surrogate) must have: [code=cplusplus] class Testing { public: Testing(); Testing(const… char* pname); ... private: char* pName; }; [/code][/QUOTE] What's a surrogate? And what is this[code=c++]Testing& operator=(const… Re: Insert data from one table to another 13 Years Ago by jlenriquez … it down into 3 tables: Word_Table -------------------------- id (surrogate primary key) word Definition_Table -------------------------- id (surrogate primary key) definition and the last table that… Re: a query that drives me bananas - a help is appreciated 13 Years Ago by mschroeder … ignore the following. In your table you're using a surrogate primary key, the auto-incrementing column. When you clearly have… ever repeat. The glaring issue I see with using a surrogate key in this scenario is that a record can be… Re: a query that drives me bananas - a help is appreciated 13 Years Ago by Stefano Mtangoo … ignore the following. In your table you're using a surrogate primary key, the auto-incrementing column. When you clearly have… ever repeat. The glaring issue I see with using a surrogate key in this scenario is that a record can be… Re: Using Cookies To Display Different Content 13 Years Ago by Airshow … set City in your profile</p>"; } } setBanner(); // ********** surrogate code to set city ********* var button1 = document.getElementById("setCity_LA…;div id="banner"></div>  <button id="setCity_LA… Re: No of code points from a file 12 Years Ago by ~s.o.s~ … that we have confirmed that you have some characters with surrogate pairs, the next point would be to understand what is… be able to read regular characters along with characters having surrogate pairs. If it still doesn't work, post/attach a…