Selecting From One Table Based On Another?
I have a table for products
and another table for the type of product it is like this:
I need this is be in a seperate table because one product can be several different types like ring,band,wedding,three-stone,etc.
but how can I then select a product based on criteria from the types table
say I wanted to select all products that are type = "Band" and type != "Fancy" ?
View Complete Forum Thread with Replies
Sponsored Links:
Related Messages:
Selecting Another Column Based On Max()
I've got a funky query I'm trying to set up. I've got this poll answers database, and each row has a qid that matches to a question. So I can group answers by the question they correspond to. Now I'm trying to select the total votes and the answer with the most votes for each question. The total votes part is working fine, but I'm having trouble with the winning answer part. I've got a MAX(votes) that works well, and finds the answer with the most votes for every question, and returns its votes. What I want to do is select the `answer` column (the one that houses the actual text answer) of the answer with the greatest votes (the winner). Code:
View Replies !
View Related
Selecting Based On Matched Column?
Lets say I have table with two columns zip_work and zip_home. I'd like to construct a query looking something like this: SELECT {here is the problem} FROM myTable WHERE zip_home=99999 OR zip_work=99999 GROUP BY zip_home, zip_work LIMIT 100; In response I'd like get two column table with zipcode as the first column and COUNT() of matched users. The idea is to know how many users are working or living in 99999 zipcode.
View Replies !
View Related
Selecting Values Based On Column
I couldn'y find solution to this on forum so here it is : sample table : id | name | value 1 | x | y 1 | z | v 2 | x | y i would like to select id where x=y and z=v. so in this case result should be : 1 (2 is not in the result coz it doesnt match x=y). How to create such a query?
View Replies !
View Related
Selecting Fields Based On The Value Of Another Field
My friend asked me to help with this query but unfortunately I wasn't able to figure it our for him. Here's the info he presented to me: Table 1 - portrait field 1 - id field 2 - type (will be the id from a row in business or personal) Table 2 - business field 1 - id field 2 - bizname Table 3 - personal field 1 - id field 2 - firstname field 3 - lastname His PHP code will select a row from portrait where 'id' is a given number. Then based on the value of 'type' for that row he will either select the 'bizname' for that corresponding id or 'firstname' and 'lastname'. There is no way to know ahead of time whether the row is a business or personal account. If this can be done without a subquery, that is ideal. However, if a subquery is required, that's ok, too.
View Replies !
View Related
Selecting Based On Time Range
I'm writing a series of queries on a transactions table. I'd like to find all transactions from: Today Yesterday Last Week Last Month This Year The table contains a datetime field called txn_timestamp. What is the appropriate code to filter the table for each time window? SELECT transaction_id FROM transactions WHERE <?>
View Replies !
View Related
Selecting All Records Without Dups Based On One Field?
I have a table with 5 fields, of which several sometimes have duplicates. example; | id | item | day | hour | ip_address | | 1 | 3 | 2 | 11 | 204.156.33.78 | | 2 | 7 | 2 | 15 | 122.165.177.211 | | 3 | 1 | 3 | 1 | 205.52.79.122 | | 4 | 7 | 3 | 9 | 122.165.177.211 | | 5 | 11 | 3 | 9 | 177.15.99.111 | | 6 | 24 | 3 | 17 | 122.165.177.211 | As you can see the ip address may obviously have dupe entries (as do other fields but I don't care if they are dupes) and I want to query the table and get all the fields but only one where there is dupe ip_address 's. So that I would get these results; | id | item | day | hour | ip_address | | 1 | 3 | 2 | 11 | 204.156.33.78 | | 2 | 7 | 2 | 15 | 122.165.177.211 | | 3 | 1 | 3 | 1 | 205.52.79.122 | | 5 | 11 | 3 | 9 | 177.15.99.111 |
View Replies !
View Related
Selecting Based On Relevancy Of Number Ranges
I'm trying to figure out the best (any) way to do a relevancy query based on how closely a group of four numbers in a row match a supplied set of numbers. Basically, in each player's row, I have four game rankings that make up 100 points total. They may, for example, be given 40 for score A, 25 for score B, 20 for C, and 15 for D And, I want to be able to return a result set thats weighted based on the someone who's got a certain set of scores In one scenario, a C of 45 and B of 20 In another scenario, a A of 50, a D of 20, and a B of 5 etc I want to weight the results based on who is closest to the first selection, then the second, then the third, etc... Is this even doable? :0
View Replies !
View Related
Selecting Values For This Record Based On Other Records
Is it possible in a select to reference the contents of a column in a different record to the one currently being assessed? Kind of like :- Select id,prev_id,title,flag FROM my_table WHERE flag != "S" AND flag(prev_id)="S"; What I'd like it to do is select records which have flag set "S", but the record referred to in prev_id do not have flag set "S". If it matter, I'm stuck on 4.0.
View Replies !
View Related
Selecting Events Based On Various Date Criterias
I'm a little stuck at how to tackle this one efficiently. I'll try to explain concisely... I have a form to search for events. Form fields include Postcode Event name Venue name When (radios) -> today -> tomorrow -> this weekend OR instead of 'When' they can choose a specific date. In the events table there are a various columns including startdate (of type datetime). There is also a column for each day of the week that the event is repeated. For example, if the event is repeated on a monday then the column 'repeat_mo will' have a value of 1. My difficulty lies in creating a query to retrieve all the relevant results. For example, a search could include the following variables from the form: postcode -> YO14 7LX when -> tomorrow So I'd need to go to the events table and retrieve all rows that have a similar postcode, a start date that is tomorrow OR has been flagged as being repeated every wednesday. The postcode bit is fine and getting tomorrow date (with php) is fine. But how do I put it all together to also take into account the repeat day flags?
View Replies !
View Related
How To Delete From 1 Table Some Rows Based On Match Results In 2nd Table?
How to delete from TABLE-1 all rows with indexes "i" that match to index j=2 from TABLE-2? TABLE 1: +---+------+ | i | name | +---+------+ | 1 | item1 | | 1 | item2 | | 7 | item3 | <-- delete all rows with i=5,6,7 | 6 | item4 | <-- delete | 5 | item5 | <-- delete | 5 | item6 | <-- delete | 7 | item7 | <-- delete +---+------+ TABLE 2: +---+---+------+ | j | i | name | +---+---+------+ | 1 | 1 | item1 | | 1 | 3 | item2 | | 1 | 2 | item3 | | 2 | 5 | item4 | <---- j=2 => i=5 | 2 | 6 | item5 | <---- j=2 => i=6 | 2 | 7 | item6 | <---- j=2 => i=7 | 3 | 8 | item7 | +---+---+------+
View Replies !
View Related
Updating Rows In Table B Based On Related Field In Table A
Ver 4.1.8-standard for apple-darwin7.6.0 on powerpc (Official MySQL-standard binary) I am trying to do some data migration based. I have several tables that contain our legacy pkey field and I want to update the tables with new ID's. I need to do this several times and have tried it several ways to no avail. Table A --------- companyID int(10) pKey legacyID int(10) old legacy pkey Table B --------- bAID int(10) pkey companyID int(10) legacyID int(10) Table A has values for both companyID (unique key) and legacyID. Table B has values for bAID (unique key) and legacyID but companyID is empty. I need to update tableB.companyID with tableA.companyID based on tableb.cSerialID to tablea.cSerialID relationship. I need a query that will update ALL rows.
View Replies !
View Related
Updating Table Based Upon Matching Field In Second Table
I have a database of books that was originally created as a flat file. Each record has a number of fields, including the authors name. I'm trying to convert the database to something a little more efficient. I've created a new table (called Authors) of unique authors names and assigned each one a unique ID. I've added a new field in the original table (called Books) for the author's ID. Now, I need to update the original table with the author ID from the Author's table. Something like this: UPDATE Books SET AuthorID = Authors.AuthorID WHERE AuthorName = Authors.AuthorName This obviously doesn't work. Any assistance on how to forumulate this query (or, if I'm headed down the wrong path, the correct way to do this operation) greatly appreciated.
View Replies !
View Related
Select Data From 1 Table Based On Criteria From Another Table
is it possible to select all the data in one table based on a criteria from another table? for instance i want to select all the therapist from massage_therapist WHERE massage_schedule.finish > 0. i don't want merged results. i just need to list all therapist based on the where criteria from a different table. these two tables have the therapist_id in common.
View Replies !
View Related
How Do I Generate Results Based On Totals Of Another Table But For 1st Table?
This is what I want to do: 1- I have Two tables: polls_created and votes 2- Table polls_created is like: poll_id owner poll_subject 3- Table votes has the votes issued for a given poll, like this: vote_id poll_id vote vote_date So what I need to do is to look at these 2 Tables and generate results based on values of these 2 tables. How do I then generate this result: MySQL Code: SELECT poll_id, owner, poll_subject, COUNT(vote_id) AS number_of_votes FROM polls_created, votes "sorted by polls that have gotten most number of Votes" Of course "sorted by polls that have gotten most number of Votes" is not real MySQL
View Replies !
View Related
Update Table Based On Email In Another Table
I'm having trouble updating the entries from a table. The situation is as follows: Customer table contains: 1) customer_email_address 2) customer_newsletter (value 0 or 1) Visitor table contains: 1) email The visitor table contains email addresses from customers that have signed up through another system. I would like to update the customer table and set customer_newsletter to 1 where customer_email_address matches email from the visitor table.
View Replies !
View Related
UPDATE Based On Value In Another Table
How do I update a table to remove orphaned references to a second table? I've deleted rows in the second table, which has a unique auto_increment key. The first table now has references to keys that no longer exist. I need to update the first table, setting the value to NULL where the referenced key no longer exists. Something like: UPDATE table1 SET table2ID = NULL WHERE table1.table2ID NOT FOUND IN table2.ID; The NOT FOUND IN isn't SQL, of course, but I'm not sure what should go there.
View Replies !
View Related
Update Based On Another Table
Is it possible to do an update in MYSQL based on another table? I have version 3.23 and when I try to run this statement: UPDATE ApplicationTbl INNER JOIN AcademicTbl ON ApplicationTbl.CampusID = AcademicTbl.CampusID AND ApplicationTbl.Application_Period = AcademicTbl.Application_Period SET ApplicationTbl.App_Status = 'Qualified' WHERE AcademicTbl.Sem_OnCampus >= '1' AND AcademicTbl.GPA >= '2.4' AND AcademicTbl.Judicial_Sanction IS NULL It keeps saying its wrong. Even though I know its not
View Replies !
View Related
Table Based On Info In Another Table
Essentially this is what i want to do. I have two Tables, Table A- has the field "id" which is the primary key Table B- has the field "id" which is the primary key Select * from tableA where Table A.id is not in tableB.id How can i form a statement that will accomplish the above.
View Replies !
View Related
Updating A Table Based On The Value In Another Table In Ver 3.23.54-Max
I am trying to update fields in table SOLAR_SYSTEM based on the values in RESEARCH_LEVEL table This is a SQL that I am trying to use UPDATE SOLAR_SYSTEM JOIN RESEARCH_LEVEL ON SOLAR_SYSTEM.USER_ID=RESEARCH_LEVEL.USER_ID SET SOLAR_SYSTEM.CASH_METAL=SOLAR_SYSTEM.CASH_METAL+1000, SOLAR_SYSTEM.CASH_CRISTAL=SOLAR_SYSTEM.CASH_CRISTAL+1000, SOLAR_SYSTEM.CASH_ENERGY=SOLAR_SYSTEM.CASH_ENERGY+1000 WHERE RESEARCH_LEVEL.TYPE='M' AND RESEARCH_LEVEL.LEVEL=1; I got error "ERROR 1064: You have an error in your SQL syntax near 'JOIN RESEARCH_LEVEL ON SO LAR_SYSTEM.USER_ID=RESEARCH_LEVEL.USER_ID SET SOLAR_SY' at line 1" I don't know what is wrong. Can I do such an update in Ver 3.23.54-Max in the first place ? IF yes, then what's wrong with my statement?
View Replies !
View Related
Creating New Table Based On Old Table
I have a MySQL database with a user table will lots of DUPLICATE email. I want to delete the rows completely having the duplicate email. I found a way out is to use some thing like this: Code: insert into newtable (email) select distinct email from oldtable But this way, only the email column is populated in the new table. I want all the other columns as well.
View Replies !
View Related
Join Table Based On Specified Condition
Is it possible to join two tables based on the specified condition in MySQL. For example, i have two tables t1,t2 and t3. The table t1 and t2 has field called name and the table t3 has field name class. I want to select the names from t1 or t2 based on the condition of class(t3). If class=4 then select name from t1, if class=10 then select name from t2.tell the query in mysql.
View Replies !
View Related
Deleting From A Table Based On Record Id
I need to execute the following query: delete from history where id=(select min(id) from history where user = username); this query doesn't work and gives me an error "ERROR 1093 (HY000): You can't specify target table 'history' for update in FROM clause" How do I rewrite this query? Ofcourse I can go for two queries, but I'd prefer to do it with a single query.
View Replies !
View Related
Order By Based On Results From Another Table
I have a query that , and i need to order the result based on wheter or not the ID of my main table appears on another table, somewhat like this: SELECT A.id AS Id, A.nome AS Nome FROM main_table A JOIN joined_table JT ON JT.id = A.id_cat ORDER BY ("first whoever have a row in" another_table AT) another_table stores the image paths related to main_table , i need to show all query results from main_table even if they don't have a image (row in another_table), but i need to show whoever have a image (a row in another_table) first... I've tryied to join with another_table and even to use sobqueryes in ORDER B... but so far i got no results. it's even worst because this query is a monter with multiple lines (the sample is simplyfied...)
View Replies !
View Related
List Available Items Based On Prerequisite Table
I'm trying to develop such a scheme: TABLE Prerequisites PrerequsiteID (FK to Upgrades table; states a prerequisite for UpgradeID in the other column) UpgradeID (FK to Upgrades table as well) TABLE BuildingUpgrades BuildingID (FK to Buildings table) UpgradeID (FK to Upgrades table; states what Upgrade Building already has) So it's a Building -> Building_Has_Upgrades -> Upgrades -> Upgrades_Have_Prerequisites thing (Building has 1..n Upgrades, Upgrade has 1..n prerequisites). In order for Building B to have an Upgrade U, that Building B has to have all the Upgrades which are required to have Upgrade U. What I want to do is to list all buildings with all upgrades available for them. I've been trying for almost whole day to solve this issue with different inner, left and right joins, subqueries and what not but I can't really do it in a clean way. The only working thing is a query, which I am ashamed of because it seems like a real waste of CPU time to me: SELECT BUPG.BuildingID, PRE.UpgradeID, COUNT(PRE.PrerequisiteID) FROM BuildingUpgrades BUPG JOIN Prerequisites PRE ON BUPG.UpgradeID = PRE.PrerequisiteID GROUP BY BUPG.BuildingID, BUPG.UpgradeID HAVING COUNT(PRE.PrerequisiteID) = ( SELECT COUNT(PrerequisiteID) FROM Prerequisites WHERE UpgradeID = PRE.UpgradeID GROUP BY UpgradeID ) What it basically does is takes all the available Upgrades, counts prerequisites that have been met by the building and checks if it's equal to the number of all prerequisites for that Upgrade. And it works but I still think there is a much better way to do it.
View Replies !
View Related
Table Creation Based On User Login
I'm trying to build a website that will allow the addition of users (w/ username, password, etc.). That seems simple enough. But is it possible to set something up (in PHP, for example) that will create a new table in the database for each new user? Ex. John Smith signs up, is verified, and a PHP script (or Java, or whatever) creates a table specifically for him. I know I'll need a master table of usernames, passwords, etc. These new tables would store certain user-specific data, such as preferences and other data the user might want to restrict access to. I know I could store all of this information in a master table, but I'm trying to think ahead. Worst case scenario, if there are millions of users (unlikely, but not impossible), I'd hate to have all that data in one table, but if I have to, I can.
View Replies !
View Related
Counting Levels On Adjacency Based Table
Does anyone know a single query that could successfully count the number of levels in a table based on the adjacency model? By "number of levels", I mean the number of LEFT OUTER JOIN that needs to be used in a query such like this one : SELECT level0.cat_ID AS level0_ID, level0.cat_parent_ID AS level0_parent_ID, level0.cat_name AS level0_name, level1.cat_ID AS level1_ID, level1.cat_parent_ID AS level1_parent_ID, level1.cat_name AS level1_name, level2.cat_ID AS level2_ID, level2.cat_parent_ID AS level2_parent_ID, level2.cat_name AS level2_name, level3.cat_ID AS level3_ID, level3.cat_parent_ID AS level3_parent_ID, level3.cat_name AS level3_name FROM ecom_categories AS level0 LEFT OUTER JOIN ecom_categories AS level1 ON level1.cat_parent_ID = level0.cat_ID LEFT OUTER JOIN ecom_categories AS level2 ON level2.cat_parent_ID = level1.cat_ID LEFT OUTER JOIN ecom_categories AS level3 ON level3.cat_parent_ID = level2.cat_ID WHERE level0.cat_parent_ID IS NULL ORDER BY level0_name, level1_name, level2_name, level3_name
View Replies !
View Related
Detecting Duplicates Based On One Field In A Table?
I can't seem to find an answer anywhere for this as most people want to delete duplicate records. I have a table, lots of fields, one of which is "title". I want mysql to return all the rows where "title" is the same. For instance if "title" was "Lord of the Rings" on id = 1 and id = 2, then the query would return both of the records, but ignore the others. It doesn't matter what the other field values are. I have found some SELECT COUNT( * ) AS num_entries, title FROM title_table WHERE title >1 GROUP BY title But this doesn't seem to work, although looks like it's on the right sort of lines? I'm not a Mysql expert, so my experience is mostly limited to the usual select, insert, update and delete queries!
View Replies !
View Related
Select Based On Two Rows In Mapping Table
I have a many to many relationship between a resource and tag: resource - 1:M - tagged_resource - M:1 - tag So a resource can have many tags and a tag can belong to many resources. The data would look like this: RESOURCE TABLE id: 1 name: resource1 TAG TABLE id: 1 tag: new id: 2 tag: tested TAGGED_RESOURCE resourceID: 1 tagID: 1 resourceID: 1 tagID: 2 How can I select the single row from the RESOURCE TABLE which has the tags 'new' and 'tested' in the TAGGED_RESOURCE TABLE? I have tried using 'IN' but it acts like an OR operator rather than AND.
View Replies !
View Related
Update Column Data Based On Another Table
I've got 2 tables: 'city' that list over 2000000 rows and 'profile' where each row are associated to a city. What I want to do is to update cities popularities based on profile without having to scan the hole 2000000 rows of 'city'. So is it possible to make those 2 query in one so I do not need to do a php loop: SELECT city, COUNT(city) FROM profile GROUP BY city; then UPDATE city SET popularity = COUNT(city) WHERE city.city_id = profile.city
View Replies !
View Related
Multiple Table Search Based On User Input
I'm working on a database containing our research data. I know very little about PHP, MYSQL, or database structure (except keep like data together in different tables and have a key field in each). I'm currently working with 3 tables (tbl_2006 and tbl_2007 structures are identical): ....
View Replies !
View Related
Populating Matrix Table Based On Books Taken By User
I've been trying to do this for 2 hours now. My noobness in mysql is not letting me get through =( USERS: id_user | f_name | l_name 1 | mike | smith 2 | david | bush etc... BOOKS: id_book | s_name | l_name 10 | book 1 | walking together 20 | book 2 | straight path 21 | book 2A| crooked path etc.... REGISTRY: id_fk_user | id_fk_book 1 | 10 1 | 21 2 | 10 2 | 20 2 | 21 etc.... Now, I am trying to fill out a table by row using pear's HTML Table that would end up like this: Name | ID | Book1 | Book2 | Book 2A | etc.. mike smith | 1 | x | | x | etc.. david bush | 2 | x | x | x | etc.. I am having a hard time because the table wants each row's data separetly before it send it to HTML output. And my SQL statement looks like this: SELECT id_user, f_name, l_name, id_book FROM USERS, BOOKS, REGISTRY WHERE id_user = id_fk_user AND id_book = id_fk_book which gets me: 1 mike smith 10 1 mike smith 21 2 david bush 10 2 david bush 20 2 david bush 21
View Replies !
View Related
Determining Which Table To Query Based On Data Within Tables
I have 2 tables: default_categories column 1: category_id column 2: category_name column 3: category_parent custom_categories column 1: custom_cat_id column 2: custom_cat_name column 3: custom_cat_parent The custom_categories table won't necessarily have anything in it but if it does, I need to choose the data from the custom_categories table over the data from the default_categories table. So if the default category has 3 rows with IDs | names: 123 | Dogs 456 | Cats 789 | Fish And the custom category has 1 row with IDs | names: 456 | Very Cute Cats I want my query of these 2 tables to produce the following IDs | names: 123 | Dogs 456 | Very Cute Cats 789 | Fish I've tried joins like the one below but they aren't working because if there is no custom_cat_id, it won't give me the result for the default category_id. MySQL SELECT * FROM default_categories LEFT JOIN custom_categories ON category_id = custom_cat_id WHERE category_parent = '' AND custom_cat_parent = '' ORDER BY $order_by $sort
View Replies !
View Related
How Do I Replace Data In An Existing Table - Based On A Column With An Identifier
Each record in the table I want to update has a unique identifier: products_model. For a given model number, I want to replace its image, which is located in a field called products_image. The file with the new data is a .txt file, a sample of which looks like this: v_products_modelv_products_imageEOREOR 5361453614.jpgEOREOR 5361553615.jpgEOREOR 5372453724.jpgEOREOR The beginning part of the table looks like this: +----------------------------------+---------------+------+-----+---------------------+----------------+ | Field | Type | Null | Key | Default | Extra | +----------------------------------+---------------+------+-----+---------------------+----------------+ | products_id | int(11) | NO | PRI | NULL auto_increment | | products_type | int(11) | NO | | 1 | | | products_quantity | float | NO | | 0 | | | products_model | varchar(32) | YES | MUL | NULL | | | products_image | varchar(64) | YES | | NULL | | | products_price | decimal(15,4) | NO | | 0.0000 | | | products_virtual | tinyint(1) | NO | | 0 | | From what I've read over the past few days...I think I need to: (a) delete the EOREOR column from the text file; (b) use the LOAD DATA INFILE command somehow, telling it to ignore the first line of column headers in the text file.
View Replies !
View Related
Returning Rows In Left Table Based On Mutliple Criteria In Right
This is starting to get to me. I'm sure there's a simple way of handling what i'm trying to do, but someone might be able to help out quicker than spending another hour searching and testing for this. Here's the problem: Simplified tables: ARCADES ======= ID, name GAMES ====== ID, name ARCADES_GAMES ============= ID, arcade_iD Games_ID Straightforward enough so far right? I'm trying to get all arcades that have ALL games in a passed in set of game_id's. So for instance I might want all arcades that have the games 11 and 14, but it must have both those. I can do soemthing like... SELECT a.name FROM arcades a WHERE EXISTS(SELECT 1 FROM arcades_games WHERE arcade_id=a.id AND game_id IN (11,14)) But that'll return all rows that match ANY of (11,14) rather than ALL of 11,14. It all comes down to the simple thing of getting rows in a table where all criteria from a list is met, but any advice on how i would do something like this?
View Replies !
View Related
Selecting One Table
I don't get a record back from him. Here is the query I use: SELECT u.*, COUNT(p.`pid`) AS `pictures` FROM `users` u, `pictures` p WHERE u.`uid`=p.`uid`; How can I get a user with 0 pictures to appear in the result set?
View Replies !
View Related
Selecting Value From Table
I have 2 tables bugs and users. Their structure with sample data is as follow: bugs bug_id assigned_to qa_contact 1 1 2 2 2 2 users user_id name 1 foo 2 bar I want a result table like this bug_id assigned_name qa_name 1 foo bar 2 bar bar that is i want the name instead of ids. can any one give me the query to retrieve this info.
View Replies !
View Related
Selecting A Table From JOINED TABLE?
I have these existing tables let say table a, table b and table c. (all connected, meaning they are joined using foreign key) note: that these table structure is not my work. (this is the work of another programmer) now i just want to select table a. I'm currently selecting table a only. but there is no result and no error.
View Replies !
View Related
Selecting One Table From Joined Table
I want to select a table where is currently joined (has foreign key). or do i need to join select both the tables first? before i can get the value of a field inside a table joined? i just want to select one table (where is currently has foreign key).
View Replies !
View Related
Restrict Selecting From A Table
Is there a way to restrict selecting from a table.. I have problem with one check, I have select and after this insert based on the select. If it happen in one time .. I can insert incorrect information. If I do lock table SOMETABLE read; it still select and return results normaly. I'm open for suggestions :)
View Replies !
View Related
Selecting From One Table, Counting From Another
What I need to do is: Select all the rows from fleet_cars where active is TRUE For each of the returned rows look up rows with the corrisponding carid in fleet_reports (corrisponds with id in fleet_cars) where reportType is 2 and timestamp > 1234 (example) and count the number of rows returned. If no results are found in fleet_reports it must return 0 The output should be something like: .....
View Replies !
View Related
Selecting From A Table Field Twice
example fields of table particle: id radius i j k Each entry in the connections table has the id of 2 connecting particles example fields of table connections: id1 -> id of the particle id2 -> id of the connecting particle What I want to do is form a query that will list the particle information for each particle and its connection. For example, for each entry in the connections table, I want to list: id1, radius1, id2, radius2 (where 1 would be the particle and 2 would be the connecting particle). I'm working with this query at the moment: SELECT x.id1, x.radius1, y.id2, y.radius2 FROM (SELECT id id1, radius radius1 FROM particles WHERE id=id1) x, (SELECT id id2, radius radius2 FROM particles WHERE id=id2) y;
View Replies !
View Related
Selecting Ids From One Table That Don't Exist In Another
I have 2 tables, they are both linked together and my life would be so much easier if they were just one big table, but they're not They have a one-to-one relationship between them and I need to find out the records in table 1 which don't have corressponding values in table 2. How can I do this? SELECT id FROM table1 WHERE id NOT IN table2 Will that do it?
View Replies !
View Related
|
TRACKER
