Are there any options in MySQL Workbench to draw the relationship-line between the columns and not the tables? If i export my diagram as JPG i can't see, which columns are foreign keys and who they are related to.
On the screenshot, you can't see, that id and user_id are connected.
In the main menu bar go to: Model -> Relationship Notation -> Connect to columns.
I'm not sure MySQL Workbench can draw relationship lines between columns but you can aware that Primary Key is shown as Key Symbol and Foreign Key is shown as Red Diamond Symbol.
Related
As shown in the figure, the Country table is combined with the City table by the green line, and the City table is combined with the Address table by the blue line. I can't figure out what's the meaning of the two kind of lines.
The connections show relationships (foreign keys). That should be clear.
When you hover with the mouse over a table figure, all connections are highlighted which either go out from or come in to that table.
Outgoing connections, that is, foreign keys defined on that table, which reference a different table are shown in green.
Incoming connections, that is, foreign keys defined in another table, which end on the current table are colored blue.
The referenced fields are colored the same way as their associated relationship.
Currently table city is active, so the foreign key from city.country_id to country.country_id is colored green (it's an outgoing connection). Table address has defined a foreign key to city, which is shown in blue. Now hover address and you will see that the connection color to city switches from blue to green.
Is there a quick way to view the primary key of a table in DBeaver? Like e.g. in the Eclipse data source explorer, where primary key rows are marked with "PK" and a special symbol.
For a given table, right click on the table name(in Database Navigator) -> select View Diagram.
This will open a window like this containing a single ER Diagram for the table -
In this diagram, the primary keys can be seen marked as bold under the table name, in the second partition.
To have a look at the primary keys of all the tables, in the Database Navigator, go to your database and then right click on public -> select View diagram. This will open the ER diagram for the whole database and the connections between the tables. Here, under each table name, the bold columns are the primary keys.
Note: A primary key can be a single key as well as a combination of multiple keys.
As per this github post, some database types (at least MySQL and PostgreSQL) show a small lightbulb to the left of the column name. This is visible in the Properties, Data and ER Diagram tabs.
Example with PostgreSQL:
I have created model in Oracle SQL Developer, in bottom there are 2 icons
1 is key (which is primary key) , 2nd is diamond ? what diamond showing ?
The diamond items show you the INDEXES on that table.
The red asterisk character to the left of the column name indicates the column has a NOT NULL constraint.
If we pull up the table in the database, we can see the indexes list and the model diagram side by side to verify.
In Oracle, a PRIMARY_KEY constraint automatically creates an INDEX of the same name, UNLESS you already have an INDEX and you tell the PRIMARY_KEY constraint to just re-use your existing INDEX.
The diamond is showing that it is a NOT NULL field.
I am new to postgreSQL. Is there any way to insert row in postgreSQL pgAdmin without using SQL Editor (SQL query)?
The accepted answer is related to PgAdmin 3 which is outdated and not supported.
For PgAdmin 4 and above, the application is running in the browser.
After you create your table, you have to make sure that your table has a primary key otherwise you couldn't edit the data as mentioned in the official documentation.
To modify the content of a table, each row in the table must be
uniquely identifiable. If the table definition does not include an OID
or a primary key, the displayed data is read only. Note that views
cannot be edited; updatable views (using rules) are not supported.
1- Add primary key
Expand your table properties by clicking on it in the pgAdmin4 legend. Right-click on 'Constraints', select 'Create' --> 'Primary Key'to define a primary key column.
2- View the data in excel like format
Browser view, right-click on your table --> select View/Edit Data --> All Rows
3- Add new row / Edit data
On the Data Output tab at the bottom of the table below the last row, there will be an empty row where you can enter new data in an excel-like manner. If you want to make updates you can also double click on any cell and change its value.
4- Save the changes
Click on the 'Save' button on the menu bar near the top of the data window.
I think some answers don't provide an answer to the original question, some of them insert records but with SQL statements and the OP clearly said WITHOUT, so I post the right answer: (Step by Step)
Alternatively you can use the query tool:
INSERT INTO public.table01(
name, age)
VALUES (?, ?);
use the lightning icon to execute.
You can do that without the SQL editor, but it's better to do this by queries.
Although, in pgAdmin, there is an option which you can click to have an excel-like window where you can add and update data in a table without using SQL language. Please select a table which you want to add a row first and click on the next icon here below.
Editing table data without primary key is forbidden
If your tables don't have a primary key or OIDs, you can view the data only.
Inserting new rows and changing existing rows isn't possible for the Edit Data tool without primary key.
Use INSERT:
INSERT INTO tablename (field1, field2) values ('value1', 2);
on pgAdmin 4, right-click on the table and use the item like below. You can also use that script in the background.
Finally, to watch the inserted data do like below. You can also use that script in the background.
All the above are correct answers. I just want to add that : When u create a table, make sure u have atleast one column as PRIMARY_KEY. Then, just follow the GUI : View/Edit data. U can add row as the last row of the table
As an update, the icon for the save button is different in pgAdmin 4.
This is how the menu should look after right-clicking on the table you want to insert into and hovering over "View/Edit Data".
After adding rows, either press F6 (on Ubuntu) or click the icon that looks like a stack of discs (database icon) with a lock on it.
Zoomed in:
Wide View:
I'm brand new to MySQL Workbench and a have a bit of experience with databases (MS Access). I'm having trouble populating my fk with data. Here's what I have in my db schema:
2 tables Block and Set (Block having a pk Block_ID (type of INT); Set having fk to Block with fk name Set_Block_ID (type of INT).
1 to many relationship created from Block to Set tables linking Block_ID to Set_Block_ID. Relationship created, no problems
I populate the Block table with data. No problems
I then go to populate the Set table with data. I can see all my columns but not the fk. My question is why?
I have created the exact same db in MS Access and my fk is displayed in the linked table and I can populate it while MS Access makes sure referential integrity is enforced. I'm really brand new to Workbench and cant figure out why I cant see and populate my fk column.
Any help is appreciated!
Thanks!! =)
After having digested all the replies to my question (note sarcasm here) I have finally found a workaround way of solving the issue. To recap:
ISSUE:
created a simple 2 table relationship with Workbench with PK and FK (1 .. n relationship)
FK column not visible in Table Edit so not possible to enter any referencing data
SOLUTION:
installed SQLyog and connected to same server
opened same database and redid the simple 1 .. n relationship
FK column visible for editing in SQLyog
likewise, FK column visible for editing in Workbench
As I said, I'm new to this whole thing so I don't know what the problem was in Workbench. I just know it seems to be working fine now.
As you have noticed, the relationship drawing tool does not create actual foreign key constraints.
However, if double-click the referencing table and switch to the foreign-key tab, you can create references and specify the columns involved. This generates and maintains the visual linkage automatically: