You can provide a custom ordering, then take the first row, like this: Explanation: The inner select’s order by field(LOCALE, ‘ge’, ‘_’) gets you the rows in the order you define – in this case German first if it exists, then English (you could add more languages to the list). The “trick” here is using mysql’s “non-standard” GROUP … Read more
Use GREATEST() E.g.: Note: Whenever if any single value contains null at that time this function always returns null (Thanks to user @sanghavi7)
Create the hobby table similarly to this:
We have many databases in our MySQL and we want to shrink/purge ibdata1 file in MySQL. How can we drop all the databases from the MySQL except information_schema and mysqld databases?
Without an index, maintaining an autoincrement column becomes too expensive, that’s why MySQL requires an autoincrement column to be a leftmost part of an index. You should remove the autoincrement property before dropping the key: Note that you have a composite PRIMARY KEY which covers all three columns and id is not guaranteed to be … Read more
I use Node.js server side. I tried my code on localhost and everything works fine. I bought a server and installed Apache and node.js on it and test my web application there. I correctly changed the MySQL connection configurations from localhost to the server configurations. I test my web application with this configuration: I start … Read more
20 I encountered such a problem: Error Code: 1290. The MySQL server is running with the –secure-file-priv option so it cannot execute this statement when I tried to execute MySQL statement (Windows): When I execute it without: Then it works. Also, the same statement with INTO OUTFILE xxx actually worked before I reinstalled the MySQL … Read more
You are comparing, not assigning: You compare values with == or ===. You assign values with =. You could write less code to achieve the same result too, with a switch statement, or just a bunch of ifs without the elseifs. I would make a function for it, like this:
mysqladmin is not a SQL statement. It’s a little helper utility program you’ll find on your MySQL server… and “flush-hosts” is one of the things it can do. (“status” and “shutdown” are a couple of other things that come to mind). You type that command from a shell prompt. Alternately, from your query browser (such … Read more
What I’m trying to do is INSERT subscribers in my database, but IF EXISTS it should UPDATE the row, ELSE INSERT INTO a new row. Ofcourse I connect to the database first and GET the $name, $email and $birthday from the url string. This works, but just adds the new row; Here’s what I tried; … Read more