Limiting Results
I have two tables one with three rows one with several. I am left joining the second table with the first one based on shared data (a id number that matches in both tables).
I run mysql_fetch_array until I have read all the data but heres the problem. Each row in table one is being returned more than once as it matches more than one row in table 2. For each row in table 1 I want to get only the first matching row in table 2.
Does that make ANY sense?
View Complete Forum Thread with Replies
Sponsored Links:
Related Messages:
Extending The Limiting Of Results
I have a table which is updated continuously and has over 2 million records in it, lets call it table A. The records have a "category" field and also a "date" field. Is there a way to get the most recent 10 records for each category in a single query? I know I can use "ORDER BY date DESC LIMIT 10" to get the 10 most recent records from the table, but I would like to extend this to get the most recent 10 for each category. I guess it would be the equivalent of (SELECT * FROM A WHERE category='cat1' ORDER BY date DESC LIMIT 10) UNION (SELECT * FROM A WHERE category='cat2' ORDER BY date DESC LIMIT 10), etc... It seems like there must be an easier way using a JOIN or something?
View Replies !
View Related
Limiting Results Of A Large Set
I'm experiencing a performance issue when trying to paginate a large set of data (around 8 million records). Currently I'm using the following query - SELECT p.Id, p.Name, p.CategoryId FROM table p WHERE p.CategoryId = SomeId LIMIT offset, 2000 Is there a more efficient way to paginate such a large set? The table is indexed for Id, Name, and CategoryId and we've assigned slightly more memory for index caching than the index size itself.
View Replies !
View Related
Limiting The Results In SELECT
I could not find where it is written, so I want to ask if MySQL can do this. In the event I want to not select a few columns is there a way I could say something like: SELECT * (but exclude col_08 and col_99) FROM table or would I have to list all 98 columns I wanted to exclude the two I don't want?
View Replies !
View Related
Limiting To Distinct Results
I want to created a list of all threads in which a specific member has posted. I've gotten as far as combining everything to show all posts by that member (given certain security measures so that only posts the searcher can see are displayed)--Which is good. But I want a scaled down version that shows distinct threads. Here is what I have: ....
View Replies !
View Related
Limiting Results In Query Question
I've got a SQL query which i want to return one result from each development in the database. The result i want to be returned is the first image in the database related to a development. There are currently two developments in my database however all the images that are stored in the database are returned and not one per development. QUERY: select development_images.development_id, developments.title, developments.description, development_images.url, development_images.image_title from developments, development_images WHERE developments.id = development_images.development_id order by developments.id DESC LINK: http://demo2.pixel-room.net/developm...dex.php?page=1
View Replies !
View Related
Limiting
I have a products table which apart from other things has a column called manufacturer. I want to run a query that returns x number of products PER manufacturer for each manufacturer that matches some criteria. table::products -------- id name cost stock manufacturer I can only figure out how to limit it to 1, eg "select manufacturer, name from products where manufacturer like 'A%' group by manufacturer order by manufacturer, name" which will return something like this Code:
View Replies !
View Related
LIMITING Records
Query 1 : SELECT * FROM TABLE_A, TABLE_B, TABLE_C LIMIT 10 WHERE TABLE_A.ID = TABLE_B.ID AND TABLE_B.ID = TABLE_C.ID Query 2: SELECT * FROM TableC INNER JOIN (SELECT * FROM TableA INNER JOIN TableB ON ID) RS1 ON ID LIMIT 10 I'm currently using mysql standard v4.1.7. Whenever i run both queries (see above), it generates an error message, which is 'check version....' Could somebody pls tell me what's wrong with my syntax?
View Replies !
View Related
Limiting Access
I'm currently making a Visual Basic application that, when run, presents the user with a username and password field. Their account corresponds to one that is from a forum, the database of which is in a remote location to where the application is running from. If I create a new user to access MySQL, how do I allow any IP address to connect to one specific database, while still only allowing all other users to connect from "localhost"?
View Replies !
View Related
Limiting Search
i only want to records on this page were the value lot has been duplicated within the colum lot. can anyone help me here please. $query = "SELECT * FROM main GROUP BY lot ORDER BY time, part LIMIT $start, $display";
View Replies !
View Related
Limiting Databases
I am recently moving my server from a VPS Linux (WHM/Cpanel) box to a Windows 2003 box. I have gotten PHP and MySQL installed (can login no probs with phpmyadmin) but what I wondering is if there is a way to create users so that when they login to phpmyadmin they can only see the database's they create like its done on my Cpanel machine. Right now I can create new users and such, but they can see all the databases that are already there.
View Replies !
View Related
Limiting Inner Joins
This has been bothering me and the relation isn't typical of the other expressions I've had to build. I have a table of 250 records that I'm returning ie. SELECT B.ID, B.Title, B.Owner FROM blogs AS B WHERE B.Status = 0 I need to return not only the blog name but the latest post they've made on their account. So what I did was used: SELECT B.ID, B.Title, B.Owner FROM blogs AS B INNER JOIN archives AS A ON B.ID = A.BlogID WHERE B.Status = 0 But when I do this it returns each record in archive with the relevent blog information. What I would like is for it to determine the latest ID insert on the blog. So if he has posts IDs such as 1010, 1050, 2063 and 2075 then it will return the blog information and the results of record 2075 in the archives table. I've tried a couple ways so far but each fails, I think what I want to do is somewhat limit the return on the inner join...sort of like add a WHERE clause unto the clause. I would have done this with a stored proc. or a view but I'm using MySQL 4 and I want to keep the querying function in my code for now. Not sure if that makes sense to the experts, if my problem isn't clear let me know I'll explain it further.
View Replies !
View Related
Limiting Downloads
I have the task at hand of limiting the number of downloads that a registered user has access to on a site I am helping out with. I have a way to count the downloads by a user, but cannot seem to find the way to limit them. Does anyone know a tip for this or perhaps a link to some kind of tutorial? I am fairly novice with MySQL.
View Replies !
View Related
Limiting Query Time
Is it possible to limit the query time in MySQL (3.x or 4.0)? For example, I'd like to have any query that takes more than a specified number of seconds just quit automatically. Seems dumb, but on a web site, nobody is going to wait minutes for a query to return so they refresh anyway. So on a busy server, MySQL ends up with several queries running that all take a long time to finish which compound to make it even slower. A simple time limit would solve the problem. Yes, I know that the queries should take less time, but again, on a busy server, sometimes the longer queries do take a long time (10 minutes or more) to complete.
View Replies !
View Related
Complex Limiting In A Join
How do I limit a certain amount of records from a join, ie (quick and idealist ***not for accuracy***) SELECT * FROM players p, games g LIMIT **first 5 games for each player, but return all players*** is this possible without a subquery?
View Replies !
View Related
Limiting Number Of Posts
i have a penpal page where registered users post messages to each other. every now and then i get spam/ advertisers post between 500 and 2000 messages to users (using scripts). is there any way where i can set / add a script so that system check how many email a user post per day or so and block him from posting with a message saying "you reached your daily limit or so ..". or is it better to use capcha ? somebody is using some sort of automated script to fill out forms.
View Replies !
View Related
Limiting Records Retrieved
I have a results database where users can be members of groups and can submit results for themselves as a member of the group. The tables involved are GROUPS, GROUPMEMBERS and RESULTS. I can easily get all of the result records for the users who are members of a particluar group. What I'd like to be able to do though is (for example) get the last 5 results records for each group member. I'm stuck with how to do this. Obviously I can select all of the users in a group and then step through the results set doing a new select to get the results for each user and using LIMIT 0, 5 Is there a smarter way? I get the feeling I ought to be able to do it in a single go by using a SELECT within a SELECT or similar but I just can't get my head around it.
View Replies !
View Related
Limiting Column Width
Is there any way to limit the width of a column? What i mean is, is there any way to stop a column thats defined as MEDIUMTEXT or TEXT messing up the table display in the terminal when its full of text.
View Replies !
View Related
Limiting Database Connections
After using Joomla for several years with my site, I decided to make my own CMS because it would be more customizable. All good, until recently. Every couple days or so, I check my site and find there are too many MySQL database connections making it impossible to view any content on the site. This is a problem. I thought my CMS was lite enough, but I guess not. Each time it grabs content, it goes to the database. Should I use caching to solve this problem? Or what else?
View Replies !
View Related
Limiting Number Of Rows In A Table
I'm trying to implement a basic log in a table. Instead of writing to a text file on the server, I want to insert entries into a 'log' table. However, I want to limit this table to only have the last 500 rows or so. How do I do this? Here's my pseudocode, but it seems as if there would be a better way: logEntry($message){ insert message into table get number of rows in table if (numrows > 500){ delete from table where ((numrows - id) > 500) } } Is that right?
View Replies !
View Related
Limiting Amount Of Returned Rows?
How do I limit the amount of returned rows? Lets say, that I want only the latest 400 rows (of e.g. 4034634 rows) - is there a parameter for that like rownum in Oracle? e.g. select * from someplace where rownum < 400 order by sometimefield?
View Replies !
View Related
Limiting Stored Proceedure Data
I trying to write a stored proceedure that limit the returned data to the last 4 hours. Does anyone know how to write this type of syntax. Basically I'm writing this proceedure query the database and return report data, but there too much data to get it all at once so I want to limit it to every 4 hours.
View Replies !
View Related
Limiting Number Of Records & Specifying Order
I have a table of results, including resultNumber and resultDate as fields. I want to retrieve the 25 most recent (by date) records ordered in ascending date order. So if for a particular user there are 50 results, I want to get the most recent 25 in ascending date order. I thought the answer was a subquery with a ORDER BY resultsDate DESC LIMIT 25 on the inner query and an ORDER BY resultsDate ASC on the outer query, but I get an error message saying not supported in MySQL 4.1.22 which my ISP has.
View Replies !
View Related
Limiting Table To Maximu Size
is there a possibility to limit the number of entries in a table to a specific amount (for instance 1 000 000). if the maximum number of entries is reached, the first entry should be deleted or overwritten. i need this functionality for some logging-stuff, and after some years of logging the database will maybe explode because of all the logging information.
View Replies !
View Related
Limiting Users' Access To Only Their Data
I'm working on a single database with a dozen or so tables and fifty or so users. Essentially every record has a field defining the user who generated the data; think scientists' measurements. Up until now we have not been concerned with restricting access to the data. Now we would like to implement some security in the sense that a particular user would only be able to interact with his or her data; that is I would like to restrict a user's privileges based on the value of a particular field for all of the records in a given table. Is this possible? One idea I had was to generate a database for each user with only his/her data, and grant the user privileges to only this database. This seems a bit clumsy though. Other than that, I can imagine implementing something through the front end when the data is selected, but this seems problematic because if someone knew SQL and their username and password they would be able to access everyone else's data with another frontend.
View Replies !
View Related
Limiting # Of Rows Returned Per Page...
I'm building a db in MySQL using PHP, and I need to limit the number of results per page returned in a query. Note, I don't want to limit the query, just the number of results shown per page. So, if 100 rows are returned, I want to show 20 per page, and have the others linked at the bottom, like: Page: 1 2 3 4 5 etc. I did a search of the forum, but only found references to the LIMIT clause. This doesn't seem to be what I need, as I don't want to limit the number of rows returned in a query, just how the results are display. So I'm not sure if this would be done with SQL, or PHP.
View Replies !
View Related
Limiting LEFT JOIN Values
All I'm wanting to do is to run a query which contains a LEFT JOIN but limit the left join so that it only returns one result while the rest of the query will output as many results as I want. SELECT n.news_id, i.news_id, i.image_id, i.image_filename FROM news_table AS n LEFT JOIN news_images_table AS i ON i.news_id = n.news_id ORDER BY i.image_id DESC LIMIT 0,25 Using that example, I only want one value from the LEFT JOIN whereas I want 25 from the rest of the query. At the moment, if the news row has more than one relational image it will output the news row however many times as there are images which is not what I want.
View Replies !
View Related
JOIN -> Limiting One Record Per User
I have a database table called 'users' and an associated table called 'profile_pics' that has records for uploaded pictures for any associated user that chooses to upload one. The thing is, one user can have many profile pictures, but on this particular page I am making, I want only the most recent profile picture to display for each user. So I want my select query to retrieve all profile pictures from all members who have a profile picture(s), but only display one profile picture for each member (eventhough they may have more than one). How can I go about doing that in my SELECT statement? Any ideas how I can work this out?
View Replies !
View Related
Grouping For A Query And Limiting Returned Data In Order Of IN()
I'm trying to pull some data from the database in which it's supposed to return 3 rows from each f.forumid in the order in which i have the forumids, however it seems to be returning all the data from the table, what am i doing wrong? PHP Code: SELECT t.threadid, t.title, t.lastpost, t.forumid, t.open, t.replycount, t.postusername, t.postuserid, t.lastposter, t.dateline, t.views, t.firstpostid, f.title AS forumtitle, p.pagetext AS preview FROM thread t INNER JOIN forum f ON (t.forumid = f.forumid) AND t.visible = 1 LEFT JOIN post p ON(p.postid = t.firstpostid) WHERE t.forumid IN(200,250,2,30,15,60,70,90) GROUP BY f.title, t.title HAVING COUNT(*) <= 3 ORDER BY f.forumid, t.dateline DESC
View Replies !
View Related
Display Results Within Results
1) I have already did a search for: "Results within results" on this site, in PHP & MySQL forums ( I think) properly...and one search resulted in over 100 pages etc. From the below structure of my DB, I would like to get the code from the below URL working on my existing data I have, but I am having trouble and I am just getting flustered.... I would eventually like to have the user "select" first a $State and then $County from a "drop down" for now, and eventually a "map" but the "drop down" for these (2) will be a must have....but I am just trying to use this function first. At present, I am unable to even get proper printed results, and I know it has to do with something on the variable call end that is screwing me up. 2) This is what I am using (learning) from: 3) This is my mySQL db structure: ....
View Replies !
View Related
Limiting Fields In "show Table Status"
show table status like "products"; Sometimes this is too much information and I was looking for a way in MySQL to select only the columns you wanted to see like you could do with a select. I know I can use PHP or Perl to parse this and output only what you want but wanted to see if there was a fairly easy way to do so in MySQL. For example if I wanted to see the Name, Rows, and Auto_increment fields only.
View Replies !
View Related
Add Up Results
Not sure if I should ask this in PHP forum or this one? I think this is a simple request. I have a table with names and dollar amounts of pledges. What I need to do is grab all the amounts for the same person and then add it up to a total amount that they owe. ie: Table is like this. Don $500 Joe $100 Don $1250 Don $1250 Fred $300 I need to pull all the info that are for Don and then add up the amounts, for example this one Don owes a total of $3000.
View Replies !
View Related
Getting Results
i use mysql 4.0.22 which means i cant use subquery's right? Ive tried using them but it dident go well. This is what im trying to accomplish SELECT service FROM rate WHERE type = 'as' service must be equal to se SELECT se FROM autosurf where st = 0
View Replies !
View Related
Different Results
I have a nightmare of a problem, where in a Query I am attempting to calculate percentages. I had the query running on an earlier version of mysql and it worked fine, and it is now running on the latest version and doesn't return the correct value. This is the query : Select DISTINCT std.student_f_name, std.student_m_name, std.student_l_name, lt.time_from, lt.time_to, lt.day, TIME(rda.clockinTime), cast(($variable1/$variable2)*100 as decimal(3,2)) from students std, record_attendance rda, lecture_times lt where std.studentID = ? AND rda.studentID = std.studentID AND rda.lectureTime = lt.id AND lt.id=? This correctly returned 33.3 percent in the older version, however in the new version returns 9.9 %. Does anyone know how this can be fixed?
View Replies !
View Related
Multiple Results
I'm using PHP to display a list of statistic information about a site. Sometimes I need to retrieve mixed information from the database but I don't know which is the best method to do it. For example I need the top requested html pages and the most repeated value from a column. I dont know if I should make two different queries in the php file or it's more efficient to make only one query with an extra column like id | ip | date | page | max | --------+--------------+----------+----------+---------| 1 + 24.125.24.25 + 24/5/03 + index + 3 | 2 + 24.125.24.25 + 24/5/03 + top + 3 | 3 + 20.12.12.21 + 24/5/03 + index + 3 | 4 + 200.12.24.25 + 24/5/03 + left + 3 | 5 + 24.1.6.255 + 24/5/03 + left + 3 | 6 + 24.125.24.12 + 24/5/03 + index + 3 |
View Replies !
View Related
Displaying SQL Results
I have made a database with all different things (venue, team names etc), the team names display fine, but I am using different code for venues (counting) and these just won't display at all, I am really new to SQL so don't know what to do to fix it! The code for getting the SQL is $sql = 'select venue,count(venue) as frequency from matches group by venue limit 300'; which works fine in phpMyAdmin and displays what I want to, but I don't know how to display it on my page! I do have the sql connection info in the php page too, plus the code which is used for displaying all my other pages but doesn't want to work now! I would like a table with headers of Venue & Number if possible, then the venues and number next to them, as it displays in phpMyAdmin
View Replies !
View Related
Matching Results
Suppose you have two tables: A and B. Both tables have the same columns: col1, col2, col3, etc. So my records are distributed in two different tables that have the same format. I know, this is not good normalization design, but that is the way they are setup right now. The question is: how do I query both in a single sql statement, combine the results of the query get all the records from both, and list the result in alphabetical order? I can do: select * from A ORDER BY status; and I can also run: select * from B ORDER BY status; But how do I run both at the same time and get a single output from them?
View Replies !
View Related
Count Results
does there exist a less resource intensive way on how to count the results of a query? I mean I know that way: Doing a query on mysql and then using mysql_num_rows for fetching the amount of results, but I guess there should be an easyer way, that probably uses a mySQL syntax for that? Probably COUNT()? I read through the explanation of it and believe this could be the way how to do, but I can´t figure out how exactly the syntax would look alike
View Replies !
View Related
Mysql Results
What i'm trying to do is count is say I ran this sql query - SELECT DISTINCTROW length FROM list - it would show only one of each result (if there were rows with duplicate lengths). Is there a query which I could do that would also count how many duplicates there were if any
View Replies !
View Related
Counting Results
i'm trying to find a way of counting the results in a mysql table. Say I have the fields CAR_MAKE | CAR_MODEL | COLOUR | Is there are way of saying car_make=bmw car_model=z3 colour=black how many of these are there im my table
View Replies !
View Related
|