AS some of your logstep_* columns value is NULL so try like this with ifnull, I’ve added only three columns you can try with all of your columns. Hope this will help you. select SEC_TO_TIME( UNIX_TIMESTAMP(ifnull(logstep_1, 0)) + UNIX_TIMESTAMP(ifnull(logstep_2, 0)) + UNIX_TIMESTAMP(ifnull(logstep_3, 0)) ) as logstep_sum_in_time from log_step 2 solved How to SUM Datetime per … Read more
In order to connect to other computers in Java, you should use Sockets, and define your own Protocol (Basically, your protocol would consist on a handshake, and some way on asking the other part of the connection to send the text’s data). Anyways, I’d recommend you using a simple SQLite database To read and save … Read more
http://php.net/manual/en/function.mysql-num-fields.php $result = mysql_query(“select * from table”); echo ‘<tr>’; for ($i = 0; $i < mysql_num_fields($result); $i++) { echo “<th>”.mysql_field_name($result, $i).”</th>”; } echo ‘</tr>’; 1 solved Gather column name of a table from database [closed]
Textview.settext displayTextView.settext(selected.getAdresse().toString()); 1 solved Display TextView containing information from the database
for 1.2 you will need one more table which will hold task and items relation ship for example Table : Task_Item_Rel {TaskID,ItemID} whenver you want item related to a particular task simply have a query with joins between task,item and Task_Item_Rel solved SQL Data models
I update your code. <?php mysql_connect(“localhost”, “root”, “”) or die(mysql_error()); mysql_select_db(“database”) or die(mysql_error()); ?> <html> <head> <title>Student list</title> <link href=”https://stackoverflow.com/questions/11200978/stylesheets/public.css” media=”all” rel=”stylesheet” type=”text/css”/> </head> <body id=”background”> <table > <tr> <td><img src=” images/Picture3.png” width=”1300″ height=”150″/></td> </tr> </table> <table> <tr> <td id=”structure”> <? // check for post data if( isset($_POST[‘name’]) && isset($_POST[’email’]) && isset($_POST[‘shift’]) && isset($_POST[‘class’]) && … Read more
well, as stated in the comments, your question is very unspecific, but i – as a fan of php and mysql – would say that those are ONE good answer to create a website like that. you can get free software suites to help you with this endeavour, start experimenting on your home computer, learn … Read more
Add field friendship_key: ALTER TABLE t_friend ADD friendship_key decimal(22,11); CREATE UNIQUE INDEX friendship_key_unique ON t_friend (friendship_key); And php part: $friends = [$userId, $friendId]; $key = min($friends).’.’.max($friends); $q = “SELECT * FROM t_friend WHERE friendship_key = “.$key; insert: $friends = [$userId, $friendId]; $key = min($friends).’.’.max($friends); $q = “INSERT INTO t_friend (friendship_key, userId, friendId) VALUES (“.implode(‘,’, [$key, … Read more
Here is SQLFiddel Demo Below is the Sample Query Which You can try SELECT * FROM temp ORDER BY CASE OperationCode WHEN ‘Repl’ THEN 1 WHEN ‘R&I’ THEN 2 WHEN ‘Ovrh’ THEN 3 WHEN ‘Refn’ THEN 4 END, OperationOrder 1 solved SQL Query with specific Order By format [closed]
$db is usually for database connection. It provides connection link to database, identifies the connection and provides database object. When you use mysql_* functions, you can define last parameter as connection variable. You use it to indentify connection, so multiple mysql connections don’t mix up. solved What can I do with the $db variable in … Read more
Looks like you’ve been relying on the ancient, long-deprecated behaviour that methods named the same as the class act as the constructor. This behaviour has finally been thrown out in PHP 8: Methods with the same name as the class are no longer interpreted as constructors. The __construct() method should be used instead. 0 solved … Read more
Your problem is that you are formatting your dates in %d-%m-%Y format, which will not work in a BETWEEN expression because it uses string comparison; for example the date 10-01-2999 would be between 09-01-2022 and 11-01-2022. You need to format them as %Y-%m-%d for BETWEEN to work correctly. If the dates in your table are … Read more
Rails itself will take care of your criteria 1 to 5. However, you need to spend a few more effort to export data from database and save it as a text file. You may also use devise as a better solution for authentication (criteria 2) and Simple Form (just google simple form rails. Sorry I … Read more
The design of your table is going to depend a lot on the requirements you need fulfilled. In the situation where a member can only ever be assigned to a single room, but rooms can have many members, then the answer that Double H gave is exactly what you’re looking for: CREATE TABLE members ( … Read more
Get all column values to one row and find the count SQL SERVER ;WITH CTE AS ( SELECT COL1 Name FROM YOURTABLE UNION ALL SELECT COL2 FROM YOURTABLE UNION ALL SELECT COL3 FROM YOURTABLE UNION ALL SELECT COL4 FROM YOURTABLE UNION ALL SELECT COL6 FROM YOURTABLE UNION ALL SELECT COL7 FROM YOURTABLE ) SELECT DISTINCT … Read more