Query From Query Results
I have a report I'm working on that is sort of like google adsense, where it tracks ad clicks and views.
I need to provide the option for the user to narrow down the results by date. I have my query worked out, but would it be better for me to run the query again and add the date information to the query, or should I cache the results and then query them?
If I were to cache the results and then run queries off that, what would be the advantages or disadvantages? I also have no idea how to go about doing that. Should I create temporary tables to hold the queried information or is there another way?
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Query Based On Results Of A Previous Query
So far I have managed to construct one query which gives me all individuals that have one of three titles. based on this I now want to find all the individuals that are affiliated to those listed in the first query ....
Run A Query On The Results Of A Query?
Lets say I have a query that searches for people living in Colorado. That results in a list on a "results.php" page. Now I want to query that result and search further for people who use Linux. I know I can do this from one query, but I would like to create several checkboxes on my results.php page where I do a further secondary query. Possible? I guess I want to query a query.
Is It Possible To Run A Query On The Results Of A Query?
I have been trying to figure this out but no luck. Lets say I have a query that searches for people living in Colorado. That results in a list on a "results.php" page. Now I want to query that result and search further for people who use Linux. I know I can do this from one query, but I would like to create several checkboxes on my results.php page where I do a further secondary query. Possible? I guess I want to query a query.
Query Giving Me Results I Don't Want.
query: SELECT sales_reps.sr_id, sales_reps.order_id, sales_reps.name, sales_reps.job_number, UNIX_TIMESTAMP( shop_orders.date ) AS date, sales_reps.stage, sales_reps.status, pi.fname AS pfname, pi.lname AS plname, sales_reps.date_to_shop, users.builder, users.division, shop_assignments.editor_id, shopper.fname AS sfname, shopper.lname AS slname, ei.shop_result, ei.good_tape FROM sales_reps LEFT JOIN shop_orders ON shop_orders.order_id = sales_reps.order_id LEFT JOIN users ON users.user_id = shop_orders.builder_id LEFT JOIN shop_assignments ON shop_assignments.sr_id = sales_reps.sr_id LEFT JOIN users AS shopper ON shopper.user_id = shop_assignments.shopper_id LEFT JOIN users AS pi ON pi.user_id = shop_assignments.pi_id LEFT JOIN exit_interviews AS ei ON ei.shop_id = shop_assignments.shop_id WHERE sales_reps.status = 'Rejected' AND ( ei.shop_result != 'Trip x1' OR ei.shop_result != 'Trip x2' OR ei.shop_result != 'Non-Reg Trip x1' OR ei.shop_result != 'Non-Reg Trip x2' OR ei.shop_result != 'Office Closed' ) ORDER BY users.builder, users.division, shop_orders.date DESC , sales_reps.stage ASC It's not filtering out the records with the shop_result field matching what I've listed.
Formatting Query Results?
I have a shell script (sh) that queries a MySQL database and then formats the results to an html page. I realize shell is probably not the best choice for this but it's all I know. My problem is that I need to do a mysql query for every field in every record in order to put it into the html page. This is obviously very slow. This is an example of what I'm doing now: ProductLine=`mysql -u www -s support <<EOF SELECT ProductLine FROM Documents WHERE ID = '$ID'; EOF` DocType=`mysql -u www -s support <<EOF SELECT DocType FROM Documents WHERE ID = '$ID'; EOF` DocName=`mysql -u www -s support <<EOF SELECT DocName FROM Documents WHERE ID = '$ID'; EOF` FileName=`mysql -u www -s support <<EOF SELECT FileName FROM Documents WHERE ID = '$ID'; EOF` Like I said, I am doing this for every field in every record. It works but it is VERY slow. I thought if there was a way to tell the query to insert a special charater between each field then I could use awk to pick out the fields and only do one query per record... something like this: SELECT ProductLine, DocType, DocName, FileName FROM Documents WHERE ID = '$ID'; I don't know how to take that output and put it into my shell variables.
Send Results From One Query To Another
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Saving Query Results
Is there any way to save the results of a query without the quote marks? When i try to import the text file that I saved the query to, I have to go thru and delete all of the quote marks.
Query Not Returning Any Results
I can't get any results form my query: SELECT * FROM userfile There's only one record in the table but I don't get nay results. The query is written in PERL: #!/usr/bin/perl -w use CGI qw(param); use CGI qw(:standard); use CGI::Carp qw(fatalsToBrowser); my $q = new CGI; print $q->header(); ..........
Excluding Results In A Query
I've got a query like this: SELECT user.*, foto.*, votes.sum(rating) FROM votes WHERE votes.foto_id = foto.fid AND user.id = votes.vote_to_user_id GROUP BY votes.foto_id ORDER BY sum(rating) DESC LIMIT 0 , 10 This query selects photos with the highest sum of votes. Now I want to exclude photos from the same user.id in this top10. (Because users have more than one photo) So what do I have to add to my query to prevent this from happening?
Query Results By Pages
I would like to display query results in pages of say 20 results each. e.g. a table with two columns, serial# and descrition, with a few thousand entries. What would be the SQL query to find a specific serial number, and display all 20 results within the "page" that row happens to be in? e.g say serial#=3211 is in row 64, display rows 60->79.
Average Over Results From Query
I would like to write a query in which i calculate the average over the result from an earlier query. I have a transaction header table and a separate transaction lines table. I am trying to count an amount per transaction by summing the lines table, grouped by transactionnumber and would like to calculate the average over all of these sums.
Save Query Results
In other words, how do I build a new table from the results of a query, so I can access pieces of this data later without performing the same query (a very heavy one) over and over again?
Filter Results Of One Query
I'm looking for the syntax that would allow me to filter one querys results using another query i.e. QUERYA = SELECT * FROM table WHERE id < 100 QUERYB = SELECT * FROM QUERYA WHERE id <> 49 I understand that I can do the above example in one query - I'm just using that to simplify matters.
Order Query Results
Regarding a dummy set of data below, ID Status 1 Open 2 Closed 3 Expired 4 Closed 5 Open 6 Cancelled 7 Expired 8 Cancelled I want to view the results but order them according to the status. i.e. i want to view in order of Open, Closed, Expired, Cancelled I can only think of a long drawn out way by which i would create the four seperate queries.
Case Insensitive Query Results?
I've been noticing that the MySQL 4.1.19 server on a client's Web server returns case-insensitive results for SELECT statements when using PHP's PDO extension. I didn't notice this happening on my XP dev server with MySQL 5.0, and have never seen it happen on any other server. Does anyone know why this happens and what can be done about it?
Query Is Not Returning Desired Results.
My query is not returning desired results. I want to structure my query to return the Post Subject, Post Text, and Poster. Instead, it is returning the correct Post Subject, correct Post Text, but the Poster is just repeating the username from the '$_POST[username]' variable. How can I alter the query to return the correct name? the query PHP <?php$conn = mysql_connect( $domain, $user, $password ) or die("Err:Conn");$rs = mysql_select_db($db, $conn) or die("Err:Db");$sql = "SELECT `table_posts_text`.`post_subject`, `table_posts_text`.`post_text`, `table_users`.`username` FROM table_categories, table_forums, table_topics, table_posts, table_posts_text, table_users WHERE username='$_POST[student]' ANDcat_title='$_POST[category]' AND`table_categories`.`cat_id`=`table_forums`.`cat_id` AND `table_forums`.`forum_id`=`table_topics`.`forum_id` AND `table_topics`.`topic_id`=`table_posts`.`topic_id` AND `table_posts`.`post_id`=`table_posts_text`.`post_id`AND `table_topics`.`topic_poster`=`table_users`.`user_id`AND`table_posts`.`poster_id`=`table_users`.`user_id`ORDER BY `table_topics`.`topic_id`, `table_posts`.`post_id`"; $rs=mysql_query($sql,$conn);while($row=mysql_fetch_array($rs)){ echo($row['post_subject'] . $row['post_text'] . $row['username']);}?> There are six tables involved: 1. table_categories (cat_id medint, cat_title varchar) 2. table_topics (topic_id medint, forum_id smallint topic_title varchar topic_poster medint) 3. table_forums (forum_id smallint, cat_id medint, forum_name varchar) 4. table_posts (post_id medint, topic_id medint, forum_id smallint, poster_id medint) 5. table_posts_text (post_id medint, post_subject varchar, post_text text) 6. table_users (user_id medint, username varchar)
Reversing Query Results (not The Same As ORDER BY)
I am trying to reverse the order in which the results of my query are given. I am tweaking a gallery. I need to get the previous 3 pics based on the pic I am looking at. The following code is a simplified version of what I have. The problem is, when I echo the results, the thumbnails are displayed in DESC order (i need them to display in ASC order) but if I order the query using ASC, the query gets the wrong images. SELECT pic_id WHERE pic_id < $current_pic_id ORDER BY pic_id DESC LIMIT 3 I need the results to show like this: oldest pic | older pic | old pic | current pic | new pic | newer pic | newest pic I've got the new pics sorted out but the old pics are causing a little problem... So basically, is there a way that I can reverse the results of my query?
Query For Displaying Results Except Latest
So I'm looking for a way to pull the results from the database showing all the records EXCEPT for the latest one i.e. if there are 30 recordsets I only want to show numbers 1-29.
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
Mixed ORDER BY Query Results
Is there a way to order a query result a specific way? For instance, I'm querying using WHERE id IN(23, 25, 19) I would like the results to stay in that order instead of by ASC or DESC. Is this possible?
Export Query Results Through Browser
This would seem simply enough but I am struggling with it. I am using PHP 4 and Mysql 5.0 I need to take the results of a query and allow the user to download the results....
Eliminating Duplicate Results From Query
I'm trying to dynamically build pull down menus based on the contents of a column (in order to build a search query). But the column may have the same data entered multiple times. This results in a pull down that has the same option listed several times. I wonder if I can eliminate duplicates from that array? So that it only appears once in the array.
Assigning Query Results To A Variable
I would like to Execute this Select Statement... SELECT MAX(VisitorID) FROM Visitors. Is there any way to store the result directly into a VB variable?? lngVisitorID = ???
Query Of Similar Results Of An Array
I know about Full-Text searchs, soundex, and subqueries with IN or SOME. But I want to make a query that joins two concepts. Let's see... I got this array ....
Assigning Query Results To A Variable
I would like to Execute this Select Statement... SELECT MAX(VisitorID) FROM Visitors. Is there any way to store the result directly into a VB variable?
Use Query-results As Delayed Insert?
Can I use the results of one query like: -> SELECT user_id FROM tbl_customers And use the results to fill the VALUES-statement in another table like: -> INSERT INTO tbl_postal ('user-id') VALUES (<previous query results>) If so, could someone complete my second SQL-statement, since I'm staring at my CRT for over 2 evenings and I cannot get it to work.
Showing Query Results In HTML
In mysql I can find the minimum data from a particular column by doing as follows: SELECT MIN(Freq_Min) FROM datatable; and mysql will display the results. Now I want to do the same thing but I want to do it in html, so I wrote the following code. When I open up the webpage stats.php it says that it couldn't execute the query. Can someone help get me on track? .....
Average Query Results Not Correct
This query works, but average results are not correct. I don't no what the problem is! Should i use subquery's? Joining is not working fot this type of query's?
Trouble With Query Results Deleting 0
I'm having trouble with the query results deleting the 0 in numbers, no matter what place it's in. EX: 10 returns 1, 100 returns 1, and even 101 returns 1. It works fine on numbers with no zeros.
Difficult Query - Need To Group Results By Id And Sum Values
I have got the meat of this query done but I am facing a problem. I am doing a VAT analysis whereby I have every shoe that is over size 7 I pay tax on and every shoe below that I don't pay tax on. I also pay tax on accessories. What I want the query to return is this: Date | ShopperID | VATable Amount | Non VATable Amount| 2006-3-1 | 802135 | 146.95 | 54.00 | Basically each shopperID will only appear once which is why I am grouping the results (which I have managed). But I also need it to total up all the VATable amounts that it finds too for both the fields on the right above. I can get the date and order number without difficulty and I have managed to get the data like this so far where I have the same ShopperID where a shopper has bought more than 1 product: +------------+----------+-----------------+---------------------+ | Date | ShopperID| VATable Amount | Non VATable Amount | +------------+----------+------------+---------------+ | 2006-09-04 | 805284 | 0 | 64.00 | | 2006-09-04 | 805287 | 2.95 | 0 | <-- Here a | 2006-09-04 | 805287 | 3.25 | 0 | customer has | 2006-09-04 | 805287 | 3.45 | 0 | bought 4 products | 2006-09-04 | 805287 | 4.95 | 0 | - I need total | 2006-09-04 | 805327 | 0 | 53.95 | under each | 2006-09-04 | 805335 | 0 | 58.95 | ShopperID | 2006-09-04 | 805414 | 0 | 64.95 | | 2006-09-04 | 805414 | 3.25 | 0 | | 2006-09-04 | 805414 | 0 | 64.00 | | 2006-09-04 | 805414 | 0 | 69.00 | | 2006-09-04 | 805423 | 0 | 64.95 | | 2006-09-04 | 805423 | 0 | 69.00 | | 2006-09-04 | 805423 | 0 | 64.00 | | 2006-09-04 | 805423 | 3.25 | 0 | +------------+-----------+----------------+--------------------+ Heres the query currently getting these results (without the GROUP BY ShopperID). SELECT Date,orders.ShopperID, CASE WHEN SUBSTRING_INDEX(Product,',',-1) REGEXP '( )?(UK)?( )?[^1-9][7-9]( )?(' THEN items_ordered.price -- If size 7 or above add price WHEN SUBSTRING_INDEX(Product,',',-1) REGEXP '( )?(UK)?( )?[^1-9]10( )?(' THEN items_ordered.price -- If size 7 or above add price WHEN SUBSTRING_INDEX(Product,',',-1) REGEXP '( )?(UK)?( )?[^1-9]11( )?(' THEN items_ordered.price -- If size 7 or above add price WHEN SUBSTRING_INDEX(Product,',',1) REGEXP 'Insole|Helmet|Laces|Wheels|Removal|Protection|Bag' THEN items_ordered.price -- If it is an accessory add VAT ELSE 0 END AS 'VATable Amount', CASE WHEN SUBSTRING_INDEX(Product,',',-1) REGEXP '( )?( )?(Kids)?( )?( )?(UK)?( )?( )?(Kids)?( )?( )?[^1-9][1|2|3|4|5|6]( )?(' THEN items_ordered.price -- If size 1 - 6 add price to other column WHEN SUBSTRING_INDEX(Product,',',-1) REGEXP '( )?( )?(UK)?( )?( )?Kids( )?( )?(UK)?( )?12|13( )?( )?(' THEN items_ordered.price -- If size kids 12/13 add price to other column ELSE 0 END AS 'Non VATable Amount' FROM items_ordered,orders WHERE (items_ordered.ShopperID = orders.ShopperID) AND (Date >= ��-1-30') AND (Date <= ��-9-31');
Query Showing More Results In PHPMyAdmin Than In My Application
I am trying to run a query on my database, my database class returns 5 results, when I run it on PHPMyAdmin (direct copy), it returns 15 results. I am 100% sure I am copying the exact query. I tried my customer db class and ADODB. I've tried many search queries, so it's not just this one. MySQL: 4.0.27-standard PHP: 4.47 Any ideas would be great appreciated, I am pulling my hair out......
Use A Mapping Table To Get Query Results From Several Tables
Ok, so I have 4 tables... Projects -> id, project_name, project_type Variables -> id, variable_name Symbols -> id, symbol_name Mapped -> project_id, variable_id, symbol_id if I had to find (project_id=5, variable_id=2, symbol_id=3) AND (project_id=2, variable_id=14, symbol_id=1) AND (project_id=34, variable_id=78, symbol_id=44) How could I write a query that would return the results for these all at once? I would like project_name, project_type, variable_name and symbol_name returned from their respective tables for each. Is that possible? I've been looking at inner joins and managed to make it work for 2 ids but not 3
Query - Top 20 Results In Ascending Alphabetical Order
I have a table which is a list of categories in an online directory.. each time the category is visited in increases the hits column by one.. I want to get the top 20 results (ie. the top twenty most popular categories) and then sort them into a list alphabetically. I tihnk I have to use a nested select but when I do this I only get the top 20 results sorted by alphabet not by hits.. Here is the table structure: CODE# # Table structure for table `category` # CREATE TABLE category ( autoID mediumint(9) NOT NULL auto_increment, title varchar(100) NOT NULL default '', hits int(11) NOT NULL default '0', PRIMARY KEY (autoID) ) TYPE=MyISAM;
Returning 1 Tables Results From Two Table Query
I am executing a query which finds a criteria from certain records in table A and returns all values from table B if the criteria in table A is true. I want to return only the data from table B but can't find an easy way to do that? E.g the MySQL 'From' expression contains both tables.
Retreiving Large Query Results In Chunks
I'm running queries with MySql 4.0.17 that return thousands of records. Because I need to present them in GUI, I returieve the results in chunks using LIMIT, for example - get first 100, then the range 100-2000 and so on. The problem is as follows: in the first chunk, MySQL uses one strategy to fetch the results, and in the following chunks - a different strategy. This means that records from the subsequent queries might have records that already appeared in the first query or that some records will be left out. For performance issues it is a problem to add a unique secondary sorting criteria (like id) to the query. Is there a clean way to force MySQL to relate to the first (initial) query result set?
Create URL From To Database Fields In Query Results
I have a MySQL database with table that works as document library. Table keeps details about docs on our server. There are bunch of fields but the key ones here are FileName, URL and location. I'm using PHP to work with the MySQL Database hosted on a Mac OS X Server. Basically, I have a query set up to pull certain records based on a field called Keywords. On the result page I want a field (or item) that combines the URL field and Filename field that ultimately points to the phycial location of the file. For every record thr url field contents is the same since the physical location of the files are in the same directory on the server. Right now the URL field has http://www.mysite.com/docs/. I'd like the result page to have the filename shown, but that filename would be a link to URL+filename. Is there a way to do this? .....
Running A 'Distinct' Query Returns Some Results TWICE !?
I've spent hours trying to find out why a perfectly simple query that uses the 'distinct' keyword such as: Select distinct(field1) From tablename; works fine based on eg. field1, but when running it on eg. field2 in the very same table, it returns 2 results (yet, only on some words!). Pls see example of result below: Eg of a 'faulty' result: .....
Query To Ignore Results If Condition True
I am having trouble defining a query that ignores rows if a query if true IE. Column 1 = 1,2,3,4,5 Column 2 = a,b,a,a,c For example: I search for results from column 1 and if '3=a', ignore all 'a' rows thus returning the result b=>2, c=>5.
Use A Mapping Table To Get Query Results From Several Tables
Hi all, Ok, so I have 4 tables... Projects -> id, project_name, project_type Variables -> id, variable_name Symbols -> id, symbol_name Mapped -> project_id, variable_id, symbol_id if I had to find (project_id=5, variable_id=2, symbol_id=3) AND (project_id=2, variable_id=14, symbol_id=1) AND (project_id=34, variable_id=78, symbol_id=44) How could I write a query that would return the results for these all at once? I would like project_name, project_type, variable_name and symbol_name returned from their respective tables for each. Is that possible? I've been looking at inner joins and managed to make it work for 2 ids but not 3 ....
Auto Saving Results From Query Browser Into Excel Format
Is there a way I can save the output(s) of select statements (in query browser) to excel files directly , so I can run this as stored procedure or script? (I have quite a few queries and wanted to automate the process so anyone can do it.)
How Can I Make A Query Like Microsoft Access, And A Query From A Query
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Do The ORs Mess Up My Results? (was "query Problem")
SELECT score, comments, job_number, fname, lname, account_name FROM feedback_reports LEFT JOIN sales_reps ON sales_reps.sr_id = feedback_reports.sr_id LEFT JOIN shop_assignments ON shop_assignments.sr_id=sales_reps.sr_id LEFT JOIN users ON users.user_id=feedback_reports.user_id LEFT JOIN accounts ON accounts.account_id=users.account_id WHERE LOWER(job_number)='mh_midwest_tt_03032007' OR LOWER(fname) like '%mh_midwest_tt_03032007%' OR LOWER(lname) like '%mh_midwest_tt_03032007%' OR score='mh_midwest_tt_03032007' AND account_name='PI' My results are including records that don't have account_name='PI' Do the ORs mess that up?
How To Do A "there Were X Results, This Is First Y" Result In 1 Query?
Let's say I have a database of book entries and I want to only retrieve the first 50 that have a certain author, even though there are more than 200 of them. What I'd like to output is a message saying, "Your search found 2xx results. Here are the first 50" Is there a way to do this in one mysql query? I know how to do it in two queries, a SELECT...LIMIT 50, and a COUNT query.
Different Results In Mysql & Mysql Query Browser?
I've come across an extremely strange problem. The exact same query in both mysql command line client, and mysql query browser gives entirely different results. I was hoping someone out there could shed some light. Ok, the query (I've stripped it bare, the real query is a bit more complex)... Each person in the people table has an associated 'place', which is an integer that maps onto a suburb in the suburbs table. The 'place' CAN be NULL. so, for all intensive purposes, the schema is roughly:
How To Create Efficient MySQL Query From A Pseudo Query
I'm trying to build a webapplication where users can search for a person having a particular preference for color and material. To store this information I use the following structure (a MySQL dump can be found at the end of this post): *table person with fields: -persid: autoincrement id -name: name of the person *table material with fields: -materialid: autoincrement id -material: name of the material eg "wood" *table color with fields: -colorid: autoincrement id -color: name of the color eg "green" *table persmaterial with fields: -persmatid: autoincrement id -persid: link to table person -materialid: link to table material *table perscolor with fields: -perscolorid: autoincrement id -persid: link to table person -colorid: link to table color In the webapplication the search can be entered by the users as a kind of pseudo query: (color=red OR color=blue) AND color=green AND material=iron My question is: how can I automatically transform this pseudo query into an efficient MySQL query? I have tried out some different options: Option 1: (SELECT p.persid FROM person p, perscolor pc, persmaterial pm WHERE p.persid=pc.persid AND (pc.colorid=1 OR pc.colorid=2) AND p.persid=pm.persid AND pm.materialid=2 GROUP BY p.persid HAVING (count(DISTINCT pc.colorid)=2 AND count(DISTINCT pm.materialid)=1)) UNION (SELECT p.persid FROM person p, perscolor pc, persmaterial pm WHERE p.persid=pc.persid AND (pc.colorid=2 OR pc.colorid=3) AND p.persid=pm.persid AND pm.materialid=2 GROUP BY p.persid HAVING (count(DISTINCT pc.colorid)=2 AND count(DISTINCT pm.materialid)=1)) Remarks: *I do not see how to turn a general pseudo query into a query like the one in option 1, except for turning the pseudo query into a sum of products form where the sulms would correspond to the UNIONs. IS there a clever way to obtain such a sum of products form from an arbitrary pseudo query? Option 2: SELECT persid FROM person p WHERE (EXISTS(SELECT * FROM perscolor pc WHERE pc.colorid=1 AND p.persid=pc.persid) OR EXISTS(SELECT * FROM perscolor pc WHERE pc.colorid=3 AND p.persid=pc.persid)) AND EXISTS(SELECT * FROM perscolor pc WHERE pc.colorid=2 AND p.persid=pc.persid) AND EXISTS(SELECT * FROM persmaterial pm WHERE pm.materialid=2 AND p.persid=pm.persid) Remarks: *very easy to get from pseudo query to MySQL query but what about performance? Option 3: SELECT p.persid FROM person p, perscolor pc, persmaterial pm WHERE p.persid=pc.persid AND (pc.colorid=1 OR pc.colorid=2 OR pc.colorid=3) AND p.persid=pm.persid AND pm.materialid=2 GROUP BY p.persid HAVING sum(case when pc.colorid in (Ƈ',Ɖ') then 1 else 0 end) >= 1 AND sum(case when pc.colorid=ƈ' then 1 else 0 end)>=1 AND sum(case when pm.materialid=ƈ' then 1 else 0 end)>=1 Remarks: *this option requires the pseudo query to be turned into a product of sums form; again is their a clever way to obtain such a form; Option 4 SELECT DISTINCT pc1.persid FROM perscolor pc1 INNER JOIN perscolor pc2 ON pc1.persid=pc2.persid AND pc2.colorid=2 INNER JOIN persmaterial pm1 ON pc1.persid=pm1.persid AND pm1.materialid=2 LEFT OUTER JOIN perscolor pc3 ON pc1.persid=pc3.persid AND pc3.colorid=1 LEFT OUTER JOIN perscolor pc4 ON pc1.persid=pc4.persid AND pc4.colorid=3 WHERE COALESCE(pc3.persid,pc4.persid) IS NOT NULL Remarks: *this option requires the pseudo query to be turned into a product of sums form Option 5: SELECT p.persid FROM person p, persmaterial pm,perscolor pc1,perscolor pc2,perscolor pc3 WHERE p.persid=pm.persid AND p.persid=pc1.persid AND p.persid=pc2.persid AND p.persid=pc3.persid AND (pc1.colorid=1 OR pc2.colorid=3) AND pc3.colorid=2 AND pm.materialid=2 GROUP BY p.persid Remarks: *very easy to get from pseudo query to MySQL query but what about performance? -- phpMyAdmin SQL Dump -- version 2.6.1 -- http://www.phpmyadmin.net -- -- Host: localhost -- Generation Time: Oct 19, 2006 at 01:13 PM -- Server version: 4.1.9 -- PHP Version: 4.3.10 -- -- Database: `aston` -- -- -------------------------------------------------------- -- -- Table structure for table `color` -- CREATE TABLE `color` ( `colorid` int(11) NOT NULL auto_increment, `color` varchar(30) NOT NULL default '', PRIMARY KEY (`colorid`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=5 ; -- -- Dumping data for table `color` -- INSERT INTO `color` VALUES (1, 'red'); INSERT INTO `color` VALUES (2, 'green'); INSERT INTO `color` VALUES (3, 'blue'); INSERT INTO `color` VALUES (4, 'yellow'); -- -------------------------------------------------------- -- -- Table structure for table `material` -- CREATE TABLE `material` ( `materialid` int(11) NOT NULL auto_increment, `material` varchar(30) NOT NULL default '', PRIMARY KEY (`materialid`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=3 ; -- -- Dumping data for table `material` -- INSERT INTO `material` VALUES (1, 'wood'); INSERT INTO `material` VALUES (2, 'iron'); -- -------------------------------------------------------- -- -- Table structure for table `perscolor` -- CREATE TABLE `perscolor` ( `perscolorid` int(11) NOT NULL auto_increment, `persid` int(11) NOT NULL default Ɔ', `colorid` int(11) NOT NULL default Ɔ', PRIMARY KEY (`perscolorid`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=7 ; -- -- Dumping data for table `perscolor` -- INSERT INTO `perscolor` VALUES (1, 1, 1); INSERT INTO `perscolor` VALUES (2, 1, 2); INSERT INTO `perscolor` VALUES (3, 2, 1); INSERT INTO `perscolor` VALUES (5, 3, 3); INSERT INTO `perscolor` VALUES (6, 3, 2); -- -------------------------------------------------------- -- -- Table structure for table `persmaterial` -- CREATE TABLE `persmaterial` ( `persmatid` int(11) NOT NULL auto_increment, `persid` int(11) NOT NULL default Ɔ', `materialid` int(11) NOT NULL default Ɔ', PRIMARY KEY (`persmatid`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=6 ; -- -- Dumping data for table `persmaterial` -- INSERT INTO `persmaterial` VALUES (1, 1, 1); INSERT INTO `persmaterial` VALUES (2, 1, 2); INSERT INTO `persmaterial` VALUES (3, 2, 1); INSERT INTO `persmaterial` VALUES (5, 3, 2); -- -------------------------------------------------------- -- -- Table structure for table `person` -- CREATE TABLE `person` ( `persid` int(11) NOT NULL auto_increment, `name` varchar(30) NOT NULL default '', PRIMARY KEY (`persid`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=4 ; -- -- Dumping data for table `person` -- INSERT INTO `person` VALUES (1, 'john'); INSERT INTO `person` VALUES (2, 'emily'); INSERT INTO `person` VALUES (3, 'liz');
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