I’m not professional in query writing, but wrote many from the time I began MySQL. Recently I noticed there is no need to type AS keyword in name aliasing. equals to However I know that this ability is out from years ago. I’ve 2 questions around this subject: Is AS keyword redundant? Sometimes ago when … Read more
when you use x.name=y.name you are comparing country name from x with the country name from y if both instances have the same country name. That basically would just return you the full table x. You want to use x.continent=y.continent because you only want to compare the country name of an instance from x with the country name of … Read more
Default sorting is ascending, you need to add the keyword DESC to both your orders:
It seems odd that this directory was not created at install – have you manually changed the path of the socket file in the my.cfg? Have you tried simply creating this directory yourself, and restarting the service?
You could store the last insert id in a variable : Or get the max id from table1 (EDIT: Warning. See note in comments from Rob Starling about possible errors from race conditions when using the max id) (Warning: as Rob Starling points out in the
It means to group by the first column regardless of what it’s called. You can do the same with ORDER BY.
First check if your command line recognizes mysql command. If not go to command & type in: Then use this command to export your database: You will then be prompted for the database password. This exports the database to the path you are currently in, while executing this command Note: Here are some detailed instructions regarding both import … Read more
To return only one row use LIMIT 1: It doesn’t make sense to say ‘first row’ or ‘last row’ unless you have an ORDER BY clause. Assuming you add an ORDER BY clause then you can use LIMIT in the following ways: To get the first row use LIMIT 1. To get the 2nd row you can use limit with an … Read more
The problem was I have 2 instances of Mysql installed and I didn’t know the password for both instances.Just check if port 80 is used by any of the programs. This is what I did 1.Quit Skype because it was using port 80.(Please check if port 80 is used by any other program). 2.Search for … Read more
Your problem is that at the moment your incoming_Cid column defined as CHAR(1) when it should be CHAR(34). To fix this just issue this command to change your columns’ length from 1 to 34 Here is SQLFiddle demo