How to fetch the first two rows from Mysql DB using Mysql PHP function? Is there any function which can give me first 2 or 3 rows from the select query we fired?
Is it possible to use a subform's 'current' record set as the domain argument to DAvg() (etc.)?
Basically, I have a subform that displays a subset of records from a query. I would like to run DAvg() over this subset. This is how I've gotten around it:
=DAvg([FieldToAvg], [SubformQuery], "ChildField=Forms.MasterForm.MasterField And FieldToAvg > 0")
but what I actually want is something like:
=DAvg([FieldToAvg], [SubformCurrentlyDisplayedData], "FieldToAvg > 0")
Is this possible in Access 2007?
I'm executing the following query
SELECT COUNT(*)
FROM table
WHERE field1='value' AND (field2 = 1000 OR field3 = 2000)
There is one index over field1 and another composited over field2&field3.
I see MySQL always selects the field1 index and then makes a join using the other two fields which is quite bad because it needs to join 146.000 rows.
Suggestions on how to improve this? Thanks
I have a table generated from some PHP code that lists a SMALL amount of important information for employees. I want to make it so each row, or at least one element in each row can be clicked on so the user will be redirected to ALL of the information (pulled from MySQL database) related to the employee who was clicked on. I am not sure how would be the best way to go about this, but I am open to suggestions. I would like to stick to PHP and/or JavaScript. Below is the code for my table:
<table>
<tr>
<td id="content_heading" width="25px">ID</td>
<td id="content_heading" width="150px">Last Name</td>
<td id="content_heading" width="150px">First Name</td>
<td id="content_heading" width="75px">SSN</td>
</tr>
<?php
$user = 'user';
$pass = 'pass';
$server = 'localhost';
$link = mysql_connect($server, $user, $pass);
if (!$link){
die('Could not connect to database!' . mysql_error());
}
mysql_select_db('mydb', $link);
$query = "SELECT * FROM employees";
$result = mysql_query($query);
mysql_close($link);
$num = mysql_num_rows($result);
for ($i = 0; $i < $num; $i++){
$row = mysql_fetch_array($result);
$class = (($i % 2) == 0) ? "table_odd_row" : "table_even_row";
echo "<tr class=".$class.">";
echo "<td>".$row[id]."</td>";
echo "<td>".$row[l_name]."</td>";
echo "<td>".$row[f_name]."</td>";
echo "<td>".$row[ssn]."</td>";
echo "</tr>";
}
?>
</table>
How do you reload an application's configuration? Or, what are good strategies for managing dynamic application configuration?
For example, let's say I had log levels and I wanted to change them at runtime. Also, let's assume this is one of many such options. Does it make sense to have a "configuration server" that holds configuration state for other parts of the application to query? Do people do that or did I just make it up?
Hi, i've recently done a migration from a really old version of some application to the current version and i faced some problems while migrating databases.
I need a query that could help me to compare columns in two tables. I mean not the data in rows, i need to compare the columns itself to figure out, what changes in table structure i've missed.
Hi,
I am looking for HTTP parsing library for C/C++.
I have looked curl library, but it seems it is a http client library.
I am looking for a library which parses HTTP header (e.g. a way to
get the query string, get cookie, get request url, get Post Data)?
Thank you.
Hi, can you help me with sql query?
I have this problem:
I have two tables
"Join" table: Reservation_has_meal
+----------------+
| id_reservation |
| id_meal |
| pieces |
+----------------+
and table with data: Meal
+-------------+
| id_meal |
| name |
+-------------+
Sample data for
Meal:
1 | carrot
2 | potatoe
3 | cucumber
Reservation_has_meal
1 | 2 | 5230
1 | 3 | 1203
How can I get this result for reservation with id_reservation=1:
id_meal | id_Reservation | name | pcs |
--------------------------------------------
1 | 1 | carrot | null|
2 | 1 | potatoe | 5230|
3 | 1 | cucumber | 1203|
--------------------------------------------
And result for id_reservation = 2:
id_meal | id_Reservation | name | pcs |
--------------------------------------------
1 | 2 | carrot | null|
2 | 2 | potatoe | null|
3 | 2 | cucumber | null|
--------------------------------------------
Thanks for advice.
I'm passing query string parameter to .aspx page with 'Ñ' character in value.
But Request.QueryString returns some other box '[]' character in return.
I think this request encoding issue. and I do not want to use that HttpUtility.UrlDecode and HttpUtility.UrlEncode methods.
Does anyone know how to solve this?
i have a asp.net mvc website which runs a number of queries for each page. Should i open up a single connection or open and close a connection on each query?
What is the easiest and most efficient way to create an auto-increment counter for every data row in google appengine?
basically I want to give every row a unique row_number so that I can overcome the issue of only being able to get the first 1000 results in a select query. I can thus add a counter lies between condition and mine all the entires in the table.
Hello, I'm using php for making queries for mysql. Here is one:
UPDATE `subscribers` SET `curDate` = NOW() WHERE `e_mail` = "$resEmail"
curDate - DateTime type. The problem is that after this query curDate of given email is
0000-00-00 00:00:00
What's wrong?
I have a fairly complicated mathematical function that I've been advised should be implemented as a User Defined Function in SQL Server so that it can be used efficiently from within a SQL query.
The problem is that it must be very efficient as it may be executed thousands of times per second, and I subsequently heard that UDFs are very inefficient.
Someone suggested that I could implement the function in C# instead, and that this would be much more efficient.
What should I do?
HI,
i have a table,
new_id----old_id----created_on
1234------5678------20100912
5678------3456------20100808
etc.
i wrote this query,
$q = "select event1.new_id, event1.old_id, event1.created_on,event2.new_id, event2.old_id, event2.created_on
FROM replaced_isbns event1
JOIN replaced_isbns event2
ON event2.new_id = event1.old_id
WHERE event1.new_id='$id'";
but i get result as
5678 - 1234, ie only one row, i want all rows...
plz help me.
Thanks,
SLC
I'm in a situation now were I need to convert a datarow I've fetched from a query into a new instance of an object. I can do the obvious looping through columns and 'manually' assign these to properties of the object - or I can look into reflection such as this: http://www.codeproject.com/Articles/11914/Using-Reflection-to-convert-DataRows-to-objects-or
What would I base the decision on? Just scalability??
when using data source=|DataDirectory|\mydb.sqlite in visual studio 2008 i can not see the tables in query builder and in dataset designer. How can i fix this?
it is a web application for .net 3.5
thanks a lot
Hi
In my mode I am selecting a field as
$query1 = $this->db->query("SELECT dPassword
FROM tbl_login
WHERE dEmailID='[email protected]'");
How to return dpassword as a variable to my controller
I tried this way return dpassword;
Currently, i am querying with this code: meta.Session.query(Label).order_by(Label.name).all()
and it returns me objects sorted by Label.name in this manner ['1','7','1a','5c']. Is there a way i can have the objects returned in the order with their Label.name sorted like this ['1','1a','5c','7']
Thanks!
my tomcat server is showing error 500 exception. actually i am not able to get connected to the table created in the pg admin3 postgresql database to the project deployed in the server.
can u please tell me the method to modify query in the table created?
This query generates an error because table2 doesn't exist:
Select * FROM table WHERE table2.id IS NOT NULL
Is there anything like this for check the table2 before apply the check on the id?
Select * FROM table WHERE (EXIST(table2) AND table2.id IS NOT NULL) or not EXIST(table2)
Thanks
Is it possible to define a current user?
I found a stored procedure 'sp_mgGetConnectedUsers'. It returns a result set with the only unique field 'Address'. How could I associate an executing query with such 'Address'.
Please advice.
Note: As far as I understand, another way to get the current user is to set a unique application Id for each connection, but I don't like this way much.
The answer in this post http://stackoverflow.com/questions/2119680/use-jquery-to-check-if-a-url-on-another-domain-is-404-or-not shows how to use YQL in Jquery to check if URL is valid or not. However, I can't get this to work for me. The only difference I can think of is that my URL is a text file (http://mycrossdomain.com/sometext.txt) and not HTML.I think the YQL query needs to be adjusted accordingly. Any help is appreciated.
I'm trying to create a popup menu, where I can detect the mouse button that was pressed for a given item. I've created a custom QAction already to build my QMenu, but the triggered signal when the menu item is pressed doesn't provide a QMouseEvent for me to query the button pressed.
Also, I'm setting the a status tip for each QAction, which appears in the status bar when I mouse over it, but it stays even after I close the QMenu. Is this normal behavior?