sql - Properly populating tables in an Object Relational database -

-

I got a homework assignment for which to apply the obel relational database to track phone billing data, Oracle 10 It is necessary to use G Express. I have a super class of communication with call, text and sub sections of data, I am making a barrier with populating these constants properly so that I can find suitable data in different tables.

My types and tables are declared as follows: 

  Type in the form of the type Type the communication (- column name here) not the last; Type the type of call type communication type (- column name here); Type the type of text under the communication type (- column names are here); Create type datatype under communication type (- column names are here); Create table communication type communication (primary and foreign key barriers here); Type the call of the call; Make a textbook of textbooks; Creating table data of datatype;

When I try to put the data in one of the sub-squares, its entry does not appear in Superclass, similarly if I < Code> Insert in Super Class, it does not appear in the appropriate sub-class For example, enter in call values ​​(call type (- value -)); None of the data in the communication shows in the communication values ​​(call type (- value -)); Show anything in the call.

What am I doing?

You have created four different tables if you enter one row in a table, the second line There is no reason to see your line in

call type , your table based on TextType and datatype their structure and behavior of communication type , but this does not mean that the data is duplicated. I suspect that you probably do not need the table communication

& lt; On one hand> Individually, if I am using the Oracle database then I will completely stop using the type of object and will only talk using a pure relational model, but it is probably just me - And this does not help you, the teacher expects you to implement the "object relational" database ... ...)


Comments

Post a Comment

Popular posts from this blog

windows - Heroku throws SQLITE3 Read only exception -

-
After I deploy the app to Heroku, I have to run migration scripts and get this error message ... ITES \ padrino \ prophetmargin & gt; Heroku Rack AR: Rack mutated! SQLite3 :: ReadOnlyException: only one try to write database to read: CREATE TABLE "schema_migrations" ( "version" varchar (255) NOT NULL) /disk1/home/slugs/215264_925fd2c_65a3/mnt/.bundle/gems/gems/ padrino-core- is 0.9.11 / lib / padrino-core / cli / rake.rb: 9: in `init ' how can this be? I also tried to run Heroku dbpush SQLite: //db/my-db.db and that did not work Horoku sqlite3 but using postgres does not do. I'm not sure why you are receiving this error, however, as I have used sqlite3 in development and when pushing it into its travel, they do some magic which migrates to postgrads. I'm absolutely sure how Heroku does 'backwash' this database but it seems that this is happening to you because it's the SQLite db file which is obviously due to Heroku's
Read more

lex - Building a lexical Analyzer in Java -

-
I am currently learning lexical analysis in compiler design. To know how a lexical analyzer actually works, I am trying to build myself. I am planning to make it in Java The input to the lexical analyzer is a .tex file that is of the following format. \ section {script} {intro} \ section {Scope} arbitrary text \ section {relevance} uncontrolled text \ subdivision (profit) arbitrary text \ subsubsection {in real life} \ subdivision {Ingredient} \ end {document} The output of the lecture may be a table of contents with a page number in another file. 1 Introduction 1 1.1 Scope 1 1.2 Relevance 2 1.2.1 Benefits 2 1.2.1.1 Real life 2 1.2.2 loss 3 I hope that This problem is within the scope of Language Analysis Read the .exe file and check '\' and continue to check whether it is actually on search In the sectioning command is set to indicate whether or not a flag variable is the type of sectioning. I hope the above approach will work for the construction of Lexa
Read more

python - rename keys in a dictionary -

-
I want to change the names of keys in a dictionary which are ints, and I need them so that the inputs with key zero They can sort correctly. For example, my keys are like this: '1', '101', '11' and I may need them: '001', '101', '011' What is doing, but I know that there is a better way tmpDict = {} in the ADC for the old: t MpDict ['% 04d'% int (olden)] = addict [oldkey] New controlled = tmpDict You are going wrong about this if you want to draw entries on a line in a specific way, then you have to sort on the extraction. for sorted (D, key = int): print '% s:% R'% (k, d [k]) < / Div>
Read more