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Logical model: How to establish a one to many relationship between 2 entities?
In a logical model of a data warehouse, how do you draw a one-to-many relationship between 2 entities in vertabelo.???
Hello,
1. Please select "add one to many relationship" in the toolbar.
2. Start dragging from "one" table.
3. Stop dragging on "many" table.
Image explanation:
Result:
Hope this helps,
Adam
Change database
Looks to me like you cannot, which is rather limiting and major headache if you've spent a long time developing it and then find you have to use a different database,
1. export existing model as XML,
2. create a new model in the DB of your choice with this XML as a starting point. You can upload it in "From Vertabelo XML" tab.
After this operation, remember to recheck all "Additional Properties" of tables, columns etc. you've set (if any), since different DBs have a different set of those additional properties.
I hope this helps.
Is there a way to copy the entire model and have it open up on another page, so that I can make a "version 2" of the model ?
Is there a way to copy the entire model and have it open up on another page, so that I can make a "version 2" of the model ?
thank you in advance for your response.
Cheers,
Claire Frankel
Never mind (how to copy). I found it ! Claire Frankel
Never mind (how to copy an entire model) I found it !
Cheers,
Claire Frankel
How to draw a one-to-many relationship between a DIM and a FACT table so that the PK of the DIM will flow into the FACT
How to draw a one-to-many relationship between a DIM and a FACT table so that the PK of the DIM will flow into the FACT ?
claire.frankel@warbyparker.com
Hello Claire,
Please:
1. Choose the 'add reference' tool.
2. Start dragging from a DIM table.
3. Drop mouse on a FACT table.
Hope this helps,
Adam
Functions
It would be nice to define functions as separate blocks in the diagram. Now I'm using "Additional SQL scripts" section in relevant tables to define functions, but since functions can consist of many views or tables it would be nice to separate them.
Vertabelo Reverse Engineering Tool doesn't extract databases
does not recognize my email
I created an account a year ago for the beginner SQL course. I tried to go back to the course today but Vertabelo is claiming that the email associated with my account does not exist. I have the receipt from my purchase on my email account. How would I go about recovering my account? Thank you.
SQLite Autoincrement
Hello, I have exported the SQL for a SQLite Database. In the tables, I have PRIMARY_KEY and AUTOINCREMENT.
CREATE TABLE CSS_AT_RULES (
id integer NOT NULL AUTOINCREMENT,
css_version varchar(10) NOT NULL,
syntax_id integer NOT NULL,
CONSTRAINT CSS_AT_RULES_pk PRIMARY KEY (id)
);
Using this format, SQLite is throwing an error due the AUTOINCREMENT is not declared as PRIMARY KEY yet (it is being done in the CONSTRAINT). I am using the java sqlite-jdbc-3.8.11.2.jar driver from org.xerial
SQL Error [1]: [SQLITE_ERROR] SQL error or missing database (near "AUTOINCREMENT": syntax error) java.sql.SQLException: [SQLITE_ERROR] SQL error or missing database (near "AUTOINCREMENT": syntax error)
A possible correct syntax (regarding to the SQLite documentation https://www.sqlite.org/autoinc.html ) for the previous example would be:
CREATE TABLE CSS_AT_RULES (
id integer NOT NULL PRIMARY KEY AUTOINCREMENT,
css_version varchar(10) NOT NULL,
syntax_id integer NOT NULL
);Could you please confirm if I am right?
Regards,
Javier.
Hello,
Yes, it is a bug.
I think, the correct syntax is (as sqlite's faq mentions https://www.sqlite.org/faq.html#q1):
CREATE TABLE CSS_AT_RULES (
id integer NOT NULL,
css_version varchar(10) NOT NULL,
syntax_id integer NOT NULL,
CONSTRAINT CSS_AT_RULES_pk PRIMARY KEY (id)
);
If column has type 'integer' and 'primary key' then has also 'autoincrement'.
In this case, the fastes solution is to unset an autoincrement option.
I hope this helps.
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