I query in a database and loop the result using while and heres the sample data retrieve: echo $db->f("FirstName")."===".$db->f("Question")."=".$db->f("Answer")."<br>"; Michael===Q2=allergy Michael===Q2=Hives Michael===Q6=A lot Michael===Q8_A=Daktacort Michael===Q1=Itch Michael===Q5=Smoke Michael===Q8_A=Diprogenta Christian===Q1=Stuffy...
I have something similar to an online chat client. When one user sends a message it will be stored in a MySQL database table with id=currentID+1. I have another client long polling and waiting for message 'id=currentID+1'. After this exchange, that row is never used again. Do I need a lock in this case? The thing I'm worried about is t...
I am having a problem where a stored procedure is taking a long time. We have two variables created @start_date and @end_date from other queries earlier in the script. Is there a way to see what those values are during the execution of the script? The script takes 3 hours to complete when it really shouldn't, I suspect the dates are off...
Hi guys, i've a huge problem. Take a look to this sample code private sub FUNCTION1() dim conn as new mysqlconnection(myconnstring) conn.open ---- do something FUNCTION2() ---- conn.close end sub private sub FUNCTION2() dim conn as new mysqlconnection(myconnstring) .... conn.open ...
i am doing this: delete from calibration_2009 where rowid in (SELECT rowid FROM `qcvalues`.`batchinfo_2009` where reporttime like "%2010%"); i need to have about 250k rows deleted. why does it take such a long time? is there a quicker way to do this? ...
Im trying to think of the best way to handle real time search for a website. The only solution I can come up with is to keep checking the server every few seconds for something new in the database, but that does not seem very practical to me. ...
I got this SQL: UPDATE users2 SET picture = 'sites/site2/files/pictures/' + picture; WHERE picture NOT IS NULL And the only thing I get are that all picture fields get the value '0'. ...
EDIT: To clarify the records originally come from a flat-file database and is not in the MySQL database. In one of our existing C programs which purpose is to take data from the flat-file and insert them (based on criteria) into the MySQL table: Open connection to MySQL DB for record in all_record_of_my_flat_file: if record contain a...
Dear Everyone I am currently using mysql. I am finding that my schema is getting incredibly complicated. I seek to find a new db that will suit my needs: Let's assume I am building a news aggregrator (which collects news from multiple website). I then run algorithms to determine if two news from different sites are actually referring to...
I have the following simple SQL statment SELECT id, name, value_name, value_id FROM table GROUP BY id ORDER BY value_id DESC when grouping I would like to get the value_name and value_id of the tuple where the value_id is the biggest. The way it is i am getting the smallest value. For example 1, name1, valuename, 3 (where i know ...
i ran a delete rows query. it was taking too long so i killed the thread from administration. did it undo the changes to the table/? ...
table1 has column CITY and COUNTRY. table2 has column CITY. how do i delete from table2 all records that have CITY in common with table1 but also the COUNTRY='Russia' ?? please keep in mind that both tables have about 1 million rows of data ...
I am trying to capture database (MYSQL) errors in my PHP web application. Currently, I see that there are functions like mysqli_error(), mysqli_errno() for capturing the last occurred error. However, this still requires me to check for error occurrence using repeated if/else statements in my php code. You may check my code below to see w...
I want to create a query result page for a simple search, and i don't know , should i use views in my db, would it be better if i would write a query into my code with the same syntax like i would create my view. What is the better solution for merging 7 tables, when i want to build a search module for my site witch has lots of users an...
Hello guys, I'm having a problem with a SQL query in my PHP Application. When the user access it for the first time, the app executes this query to create all the database: CREATE TABLE `databases` ( `id` bigint(20) NOT NULL auto_increment, `driver` varchar(45) NOT NULL, `server` text NOT NULL, `user` text NOT NULL, `password...
DELETE table2 FROM table2 INNER JOIN table1 ON table2.CITY = table1.CITY WHERE table1.COUNTRY = 'Russia' both tables have about half a million records, about 10 columns each. each column is not larger than about 100 characters how long will this take if there are about 250,000 records matching the criteria? ...
I have taken a jQuery script which would remove divs on a click, but I want to implement deleting records of a MySQL database. In the delete.php: <?php $photo_id = $_POST['id']; $sql = "DELETE FROM photos WHERE id = '" . $photo_id . "'"; $result = mysql_query($sql) or die(mysql_error()); ?> The jQuery script: $(document).ready...
I have this query: UPDATE table_name SET field_1 = field_1 +100, field_2 = field_2 +100, field_3 = field_3 +100 WHERE id = 1 LIMIT 1; Where Field_1 is regular integer, Field_2 is decimal(15,6) and Field_3 is double(15,6). When I run this query from php script they update just field_1 and nothing happen with field_2 an...
i am doing this: delete calibration_2009 from calibration_2009 join batchinfo_2009 on calibration_2009.rowid = batchinfo_2009.rowid where batchinfo_2009.reporttime like '%2010%'; both tables have about 500k lines of data i suspect that 250k match the criteria to be deleted so far it has been running for 2 hours!!! is there something ...
What is the purpose of a temporary table like in the following statement? How is it different than a regular table? CREATE TEMPORARY TABLE tmptable SELECT A.* FROM batchinfo_2009 AS A, calibration_2009 AS B WHERE A.reporttime LIKE '%2010%' AND A.rowid = B.rowid; ...