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Under review

Problem with student account

Roman Hrybinchuk 6 days ago • updated by Mariusz Zakrzewski 3 hours ago 1

Hello , i have got a problem like i am a student but i have limit operations and have to buy subscription , i dont know how to fix it 


how to set foreign key

Anik Chowdhury 4 years ago • updated by Emma\Grant 3 days ago 6

reference name seems to be invalid

Obiora Nwosu 6 months ago • updated by Emma\Grant 5 days ago 5

Need to change to a student account

John Daroch 2 weeks ago • updated by Rafał Strzaliński (Senior Engineer) 2 weeks ago 1

i have signed up for a normal account and i needed to set up a student account. how do i do this as i have already done complete work on here and i dont want to lose it.

Under review

Academic Account Clash

Julianne Simons 3 weeks ago • updated by Adam Mościcki 3 weeks ago 1

Hi I added an academic account after using a trial version then realising I was eligible. I joined the accounts together as a team to get my model, I have now closed my trial account, but my student account still shows as a trial version, please help


The Oracle SQL generator dont add the comments associate to the tables and columns.

Erika Valerio 4 weeks ago • updated by Mariusz Zakrzewski 4 weeks ago 3

A couple of days ago I used the sql generator and the comments were associated without problems. However, today I try to generate the Oracle SQL of my model and it does not add any comments to the objects. My account is free for the moment. I would appreciate your quick response and attention. Greetings.


pg_dump and pg_dump all tools backup create zero size backup file from linux putty terminal

nigersultana10 1 month ago • updated 1 month ago 2

I have install postgres database version 9.6 , 10  on OS Centos 7 64 bit. trying to taken backup with this command

-bash-4.2$ pg_dump -h localhost -Fc backupdb > /var/lib/pgsql/niger_pgbackup/nigerpg_bkp.sql.

but problem is the backup file size had zero . I have tried many time. Kindly help where i have wrong.

-bash-4.2$ pg_dump -h localhost -Fc backupdb > /var/lib/pgsql/niger_pgbackup/nig erpg_bkp.sql
-bash-4.2$ cd niger_pgbackup/
-bash-4.2$ ls -ltr
total 0
-rwxrwxrwx 1 postgres postgres 0 Oct 7 23:38 nigerpg_bkp.sql




how can i sql execute queary

Yash Sharma 1 month ago • updated by Rafał Strzaliński (Senior Engineer) 1 month ago 1

Made a foreign key, but this relationship is not shown in SQL preview

le_univers 1 month ago • updated by Rafał Strzaliński (Senior Engineer) 1 month ago 1

Apology if this is too basic, but I'm really new to everything and struggling.

So I know how to make a foreign key 

: When there are 2 entities, A and B, you draw a reference from A to B and voila,

the primary keys of A are shown in the B entity boxes as foreign keys, with some names like "A_id".

But when I actually check the SQL preview of B, I don't see any such information as that this data is coming from A.

Am I missing something? How can I make a SQL code like below show up?