How to update two columns in a MySQL database?
This doesn't work: UPDATE customers SET firstname="John" AND lastname="Smith" WHERE id=1; ...
mysql
How do I delete a foreign key in SQLAlchemy?
I'm using SQLAlchemy Migrate to keep track of database changes and I'm running into an issue with removing a foreign key. I have two tables, t_new is a new table, and t_exists is an existing table. I need to add t_new, then add a foreign key to t_exists. Then I need to be able to reverse the operation (which is where I'm having troubl...
How to select multiple rows by primary key in MySQL?
SELECT * FROM `TABLE` WHERE (`PRIMARY_KEY`= `VALUE1`) OR (`PRIMARY_KEY`= `VALUE2`) OR (`PRIMARY_KEY`= `VALUE3`) OR (`PRIMARY_KEY`= `VALUE4`) OR (`PRIMARY_KEY`= `VALUE5`) OR ... This works. But is there a faster way? ...
mysql connect not working with PHP
Any idea why the following code is not working mysql credentials are correct, have verified from command line. The second connection fails i.e., $conn1 . I am clueless !!! $conn = mysql_connect($hostname, $username, $password) or die("Connecting to MySQL failed" . mysql_error()); $conn1 = mysql_connect($hostname, $username1, $...
what are the difference between InnoDB and MyISAM.
what are the difference between InnoDB and MyISAM. Which one I can go for? any areas where one provides and other doesnot provide? IS there any technological limitations in any of the both types? Please help me to choose the right type for my project? ...
Make MySQL database replication always use the most free node?
We started using Multi-Master Replication Manager for MySQL, and I am wondering whether it is possible to to treat this setup like multi-symmetric processing: a process pops off the process queue, and the node (in this case a server) that is most free is selected for the job. It seems that what happens is, the service switches to a slav...
One to One relationship in MySQL
I'm trying to make a one to one relationship in a MySQL DB. I'm using the InnoDB engine and the basic table looks like this: CREATE TABLE `foo` ( `fooID` INT(11) NOT NULL PRIMARY KEY AUTO_INCREMENT, `name` TEXT NOT NULL ) CREATE TABLE `bar` ( `barName` VARCHAR(100) NOT NULL, `fooID` INT(11) NOT NULL PRIMARY KEY, CONSTRAINT `c...
Problems with MySQL OR clause
I have a problem with AND and OR clause in SQL. Here is my query: SELECT `act1`.`name`, `act1`.`surname`, `act2`.`name`, `act2`.`surname`, `act3`.`name`, `act3`.`surname` FROM `videos`, `actors` AS act1, `actors` AS act2, `actors` AS act3 WHERE `videos`.`ident` = 'somethink' AND ( ...
How to order results based on number of search term matches?
I am using the following InnoDB tables in mysql to describe records that can have multiple searchtags associated with them: TABLE records ID title desc TABLE searchTags ID name TABLE recordSearchTags recordID searchTagID To SELECT records based on arbitrary search input, I have a statement that looks sort...
How to query one table and add rows to another using that first query? MySQL
I have some users setup in a MySQL table with different variables. I am trying to figure out what would be the best way to do this. Basically I want to award all of my registered and active users with bids which are stored in another table. So for the Table "users" I have ran this query: SELECT * FROM `users` WHERE `active` = 1 ...
What does MySqlDataAdapter.Fill return when the results are empty?
I have a 'worker' function that will be processing any and all sql queries in my program. I will need to execute queries that return result sets and ones that just execute stored procedures without any results. Is this possible with MySqlDataAdapter.Fill or do I need to use the MySqlCommand.ExecuteNonQuery() method? Here is my 'worker...
SELECT a list of elements and 5 tags for each one
Hi, I'm trying to query a set of buldings listed on a table, these buildings are linked with tags. I'm able to do it, but my problem is how limit the number of tags to see: table buildings id building_name style 1 Pompidou bla 2 Alcatraz bla 3 etc. etc. table tags // they can be 50 or m...
How to create mysql database from shell command?
I'm looking for something like createdb in psql or any other solution that would allow me to create databse with a help of a shell command. Any hints? ...
mySQL not saving data?
i have a PHP contact form that submits data, and an email...: <?php $dbh=mysql_connect ("localhost", "username", "password") or die ('I cannot connect to the database because: ' . mysql_error()); mysql_select_db ("guest"); if (isset($_POST['submit'])) { if (!$_POST['name'] | !$_POST['email']) { echo"<div class='error'>Error<br />P...
How do you fix a MySQL "Incorrect key file" error when you can't repair the table?
I'm trying to run a rather large query that is supposed to run nightly to populate a table. I'm getting an error saying Incorrect key file for table '/var/tmp/#sql_201e_0.MYI'; try to repair it but the storage engine I'm using (whatever the default is, I guess?) doesn't support repairing tables. how do I fix this so I can run the query...
How to insert into two different tables in one statement with Java and MySQL?
I am using Java, Spring (NamedParameterJdbcTemplate) and MySQL. My statement looks like this: INSERT INTO Table1 (Name) VALUES (?); INSERT INTO Table2 (Path, Table1Id) VALUES (?, LAST_INSERT_ID()) But it is throwing the following error: PreparedStatementCallback; bad SQL grammar [INSERT INTO Table1 (Name) VALUES (?); INSERT INTO Tab...
Can you automatically create a mysqldump file that doesn't enforce foreign key constraints?
When I run a mysqldump command on my database and then try to import it, it fails as it attempts to create the tables alphabetically, even though they may have a foreign key that references a table later in the file. There doesn't appear to be anything in the documentation and I've found answers like this that say to update the file aft...
MySQL forgot about automatically creating an index for a foreign key?
After running the following SQL statements, you will see that, MySQL has automatically created the non-unique index question_tag_tag_id_tag_id on the tag_id column for me after the first ALTER TABLE statement has run. But after the second ALTER TABLE statement has run, I think MySQL should also automatically create another non-unique in...
[PHP, CSS, & ?] fixed width div, resizing text on the fly based on length
Let's say you've got a simple fixed-width layout that pulls a title from a MySQL database. CSS: #wrapper { width: 800px; } h1 { width: 100%; } HTML: <html> <body> <div id="wrapper"> <h1> $titleString </h1> </div> </body> </html> But the catch is, the length of the title string pulled from your MySQL da...
Display Last 200 mysql entries no dupes
I'm just wondering how I could display my last 200 mysql entries in php without showing duplicate entries. ...