I designed a MYSQL Workbench ERM with many forign keys relations etc.
I noticed that my ERM had some faults, because if I try to generate models automatically with it, it says that I have got some faulty relations.
Now is my question :
Is there any tool for checking these relations or forign keys , because Workbench ERM Designer can't do this, also if I export the script and Import it to a MYSQL Database there is no Error shown
Related
When I try and create a relationship between two tables I get the error -
"Relational features are disabled".
I've seen that updating phpmyadmin could possibly solve the issue, but I don't have access to do this. I contacted hostgator and they say I'm unable to do this and I would have to upgrade to a different plan in order to upgrade phpmyadmin.
I'm currently running version 4.3.8.
Is there any other fix for this error to allow relationships to be created between tables?
you have to convert your table/db engine to InnoDB with this query :
ALTER TABLE table_name ENGINE=InnoDB;
I haven't managed to find a specific answer to this question which works for me, but maybe i'm misunderstanding one or two key points.
I am trying to create a data migration policy for a project where 3 systems (2 X MySQL, 1 X MS SQL) are being consolidated into 1 new system (MS SQL).
To help visualize this problem i want to create Entity Relationship Diagrams for each database. I know how to reverse engineer each database to a sql script, and i know that programs like MySQL Workbench and SQL server management studio have tools which allow you to create diagrams.
My question is: Is there any way to create the diagrams automatically? I.e. somehow analyse foreign keys and detect which field(s) in table A link to table B and insert links in the diagram between the correct fields?
SQL Server Management Studio comes with a diagramming tool. In the Object Explorer, expand your database, then right click on Database Diagrams. You can view and create new FK relationships in there.
I have just realised that the databases i am testing with do not have foreign key constraints set up properly. So i guess the answer is yes, there are ways you can create these diagrams automatically but the foreign keys must be configured.
I have got a database in MS Access format and I want to export it to MySQL. I used this tool to import the database to MySQL successfully. However when I try to do "Reverse Engineer" in MySQL Workbench to draw its schema, all I get is tables without relationhip links. Is there something I am missing?
Relationships can only be drawn for foreign keys. If you don't have foreign keys (e.g. only MYISAM tables) then you won't get any relationship. Try the migration module from MySQL Workbench to see if that gives you more in your target schema (tho no promises). If all fails you have to manually add foreignkeys and thereby getting relationships.
I'm using MySQL workbench 5.2.35 CE to reverse a Mysql Database and show the diagram of tables with their relationships.
I am able to get every table and its fields but the relations between them is not shown. Why is that? Is there any way it can be fixed?
Most often, the relations between tables are not stored in the DB. How to combine two tables is entirely up to the SQL query and because there are near endless possibilities to name your columns this is not easy to guess. Try to find some SELECT statements or use brute force to find out wich columns match.
If you are using MyISAM as the database engine, your database is not fully relational. Make your database fully relational by using InnoDB engine. Then you will be able to see the relations when you do reverse engineering. But please note that each has pros and cons of its own. Google MyISAM vs InnoDB to find out more about the differences.
I have tested mysql-workbench for both 5.2 and 6.0 latest version. My database got foreign key constraints defined clearly. My database is using mysql-native SQL. But the relationships are shown as line between tables. I have created another test database with only two tables. In this case the InoDb was used as engine. The foreign key constrain clearly defined. Still it only generate two lonely table object in the ER diagram after going through the "reverse engineering" module.
While using another commercial software, I was able to generate the 'lines' between the Entities.
My question is, is this a problem of workbench itself, or some error on my part. My database server is the latest stable version 5.6.12. If I can get an answer, this will be good for everyone. You don't have to waste time trying to get an ER-diagram with this piece of software.
I want to create two tables with one to many relations. I use MySql Control center,but I did not find to add foreign key.I do not want to use console commands,How can I do? I also want to use transation so I use InnoDB table type, How can I add relation between two tables in Control Center.Is there another GUI software to handle Mysql?Pls tell me.
You should check SQLYog by Webyog
http://www.webyog.com/en/downloads.php#sqlyog
Why don't you give a try to MySQL Workbench 5.1 OSS it can do the job for, after created the entity you just export it as SQL format or XML as you wish, then import to your mysql database.
Folow the link Download Here