You use a self join when a table references data in itself. E.g., an Employee table may have a SupervisorID column that points to the employee that is the boss of the current employee. To query the data and get information for both people in one row, you could self join like this:
Now rows that were like http://www.example.com/articles/updates/43 will be
Note: For MySQL 5.7+, please see the [answer from Lahiru] to this question. That contains more current information. For MySQL < 5.7: The default root password is blank (i.e., an empty string), not root. So you can just log in as: You should obviously change your root password after installation: In most cases you should … Read more
If you found the exact error “The wait operation timed out” then it is likely you have a database call that took longer than expected. This could be due to any number of things: Transient network problem High SQL server load Problem with SAN, RAID, or storage device Deadlock or other form of multiprocess contention … Read more
You can do the following (I guessed on table fields,etc) Based on your request for multiple halls you could do it this way. You just join on your Hall table multiple times for each room pref id:
The error means that you are providing not as much data as the table wp_posts does contain columns. And now the DB engine does not know in which columns to put your data. To overcome this you must provide the names of the columns you want to fill. Example: Look up the table definition and see which … Read more
Note: For MySQL 5.7+ please see answer from @Lahiru to this question. That contains more current information. For MySQL < 5.7: The default root password is blank (i.e. empty string) not root. So you can just login as: You should obviously change your root password after installation In most cases you should also set up individual user accounts before working extensively … Read more
Use the instructions for resetting the root password – but instead of resetting the root password, we’ll going to forcefully INSERT a record into the mysql.user table In the init file, use this instead
Try using different quotes for “y” as the identifier quote character is the backtick (“`”). Otherwise MySQL “thinks” that you point to a column named “y”. See also MySQL 5 Documentation
Try using different quotes for “y” as the identifier quote character is the backtick (“`”). Otherwise MySQL “thinks” that you point to a column named “y”. See also MySQL 5 Documentation