When creating a foreign key constraint, MySQL requires a usable index on both the referencing table and also on the referenced table. The index on the referencing table is created automatically if one doesn’t exist, but the one on the referenced table needs to be created manually (Source). Yours appears to be missing. Test case: … Read more
The main reason why the error has been generated is because there is already an existing value of 1 for the column ID in which you define it as PRIMARY KEY (values are unique) in the table you are inserting. Why not set the column ID as AUTO_INCREMENT? CREATE TABLE IF NOT EXISTS `PROGETTO`.`UFFICIO-INFORMAZIONI` ( … Read more
Have you tried dragging the window boarder just above the “Object Info” button?
In MySQL Query Browser, right click on the cell and select ‘Clear field content’ while the focus is in another cell. In MySQL Workbench, right click on the cell and select ‘Set Field to NULL’.
Key: (Part of) Primary Key Filled Diamond: NOT NULL Not filled Diamond: NULL Red colored: (Part of) Foreign key Blue lined Diamond: Simple attribute (no key) Can be combined for example: is a Red colored Key so it’s a Primary Key which is also a Foreign Key is a Yellow (non Red) Key so it’s … Read more
From Wamp Version 3.2.6 Just edit this file: C:\wamp64\bin\mysql\mysql8.0.27\my.ini Change the config for innodb-default-row-format value from innodb-default-row-format=compact to innodb-default-row-format=dynamic Restart mysql
I am using Ubuntu 18.04. Here is a the error I’m seeing: Solution Go to Ubuntu software center. Search for MySQL workbench community. Click on permission Enable Read, add …. to on
Try just: UNIX_TIMESTAMP() And see here: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_unix-timestamp
If you mean you want to update one table’s column using another table’s column, then here are some options: A join: UPDATE table1 AS t1 INNER JOIN table2 AS t2 ON t1.EmpoyeeNo = t2.EmployeeNo SET t1.SomeColumn = t2.SomeColumn Alternatively it could be a left join: UPDATE table1 AS t1 LEFT JOIN table2 AS t2 ON … Read more
Database > Synchronize Model… Choose Stored Connection Select the Schemata Choose which to update: Model or Source (in your case, point arrows to Model)