New versions of MySQL WorkBench have an option to change specific timeouts. For me it was under Edit → Preferences → SQL Editor → DBMS connection read time out (in seconds): 600 Changed the value to 6000. Also unchecked limit rows as putting a limit in every time I want to search the whole data … Read more
Launch MySQL Workbench. On the left pane of the welcome window, choose a database to connect to under “Open Connection to Start Querying”. The query window will open. On its left pane, there is a section titled “Object Browser”, which shows the list of databases. (Side note: The terms “schema” and “database” are synonymous in … Read more
UNION puts lines from queries after each other, while JOIN makes a cartesian product and subsets it — completely different operations. Trivial example of UNION: similary trivial example of JOIN:
This part: makes it possible to introduce a variable without the need of a seperate query. So the first query could also be broken down into two queries like this: for instance when used in a stored procedure.
Like the error says, row is a tuple, so you can’t do row[“pool_number”]. You need to use the index: row[0].
You can change the encryption of the user’s password by altering the user with below Alter command : ALTER USER ‘username’@’ip_address’ IDENTIFIED WITH mysql_native_password BY ‘password’; OR We can avoid this error by make it work with old password plugin: First change the authentication plugin in my.cnf file for Linux / my.ini file in Windows: [mysqld] … Read more
The image below helps show the differences between B+ trees and B trees. Advantages of B+ trees: Because B+ trees don’t have data associated with interior nodes, more keys can fit on a page of memory. Therefore, it will require fewer cache misses in order to access data that is on a leaf node. The … Read more
For InnoDB, the following seems to work: create the new empty database, then rename each table in turn into the new database: You will need to adjust the permissions after that. For scripting in a shell, you can use either of the following: OR Notes: There is no space between the option -p and the password. If your … Read more
It should be as simple as running this: If the dump is of a single database you may have to add a line at the top of the file: If it was a dump of many databases, the use statements are already in there. To run these commands, open up a command prompt (in Windows) … Read more
Looks like the mysql server is not started. Look to the official documentation of MySQL how you can start a service under windows. Install the server as a service using this command: C:> “C:\Program Files\MySQL\MySQL Server 5.5\bin\mysqld” –install