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  • SQL SELECT Join?

    - by SurfingCat
    Hello, i got a MySql DB. There is a table with products and orders. Structure: Products: product_id, name, manufacturers_id Orders: orders_id, product_id, quantitiy Now I want to get all orders (show only products where product id=1). I tried: SELECT orders.orders_id, orders.product_od FROM products, orders WHERE products.manufacturers_id = 1 GROUP BY orders_id ORDER BY orders_id But this doesnt work

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  • Advanced Form Validation in JavaScript

    - by Kaji
    I'm already familiar with how to use onSubmit to evaluate form content against RegEx to ensure it meets static parameters for acceptable content. What I'm wondering is if there is a way to further provide validation against a MySQL database, such as if you want to make sure an e-mail address hasn't been used yet before submitting a form and having to re-load the field data back into the proper places for correction.

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  • SQLite - ON DUPLICATE KEY UPDATE

    - by Alix Axel
    MySQL has something like this: INSERT INTO visits (ip, hits) VALUES ('127.0.0.1', 1) ON DUPLICATE KEY UPDATE hits = hits + 1; As far as I'm know this feature doesn't exist in SQLite, what I want to know is if there is any way to archive the same effect without having to execute two queries. Also, if this is not possible, what do you prefer: SELECT + (INSERT or UPDATE) or UPDATE (+ INSERT if UPDATE fails)

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  • Dynamic sql vs stored procedures - pros and cons?

    - by skyeagle
    I have read many strong views (both for and against) SPs or DS. I am writing a query engine in C++ (mySQL backend for now, though I may decide to go with a C++ ORM). I cant decide whether to write a SP, or to dynamically creat the SQL and send the query to the db engine.# Any tips on how to decide?

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  • How to hack your own website

    - by Saif Bechan
    I am in late testing phase of my web application. The application will be tested at a larger scale now. During this time I want to try and hack my own system and application with some tools, scripts, etc. Mostly some code I can try and execute in the browser. I have backups for the whole system so even down to the kernel can be hacked. My system is nginx,apache,php,mysql on Linux CentOS.

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  • how understand one result set is subset of another in twomysql select result set ?

    - by Ehsan Khodarahmi
    Hi I've 2 mysql select statements, suppose these are my queries & their result : Statement 1 : select id from a which returns this result set : { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 } Statement 2 : select id from b which returns this result set : { 3, 5, 10 } I want to write a query which determines whether resultset1 contains all records of resultset2 or not. I think needs a simple query, any suggestion ???

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  • Whats better query with long where in condition or many small queries?

    - by DCrystal
    Maybe it's a little dumb, but i'm just not sure what is better. If i have to check about 30k rows in db for existanse, what i'd do? #1 - one query select id from table1 where name in (smth1,smth2...{till 30k}) #2 - many queries select id from table1 where name=smth1 Though, perfomance is not the goal, i don't want to go down with mysql either ;) Maybe, any other solutions will be more suitable... Thanks.

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  • special characters strange behavior

    - by andufo
    Hi, i have this string in my utf-8 mysql DB: "Pruebá de eñes" When i print it like plain text, everything works ok, but if i load that same field inside an input, textarea, etc, it becomes: "Pruebá de eñes" How can i solve this problem? =(

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  • How to generate a random but unique number and display that number within the source of my image tag

    - by Matthew
    Hello guys, I have done some searching but really haven't found what I'm looking for. What I would like to do is generate a random BUT unique 5 digit number and push whatever number into an img tag on my page. For example when people come to my page this number would generate and get pushed into this image tag: <img src="http://www.sample.com?randomNUM=12345" height="1" width="1" /> I have a mySQL DB and am looking to do this in PHP. Thank, Matt

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  • Serialize checkbox array, also get checkboxes with off-value

    - by guzh
    Hi, I was wondering if this is possible. The serialize-string will be inserted in a mySQL-database, so it would be fine if all checkboxes would be inserted and not only the ones that is ticked(on). it's possible to make on column in the database for each of the checkboxes, and use this if/else-statement: if(isset($_GET['checkbox'])) { // It's checked! } else { // not checked! } but its a bit unappropriate...

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  • what's the best practice to config Hibernate-Spring for multiple database relationship?

    - by nazila
    We have a main mysql database which all of the applications within our organization need the data within this database. How can I config my java web application to use this database with it's specific database when I use Spring and Hibernate within my application? How can I config JPA annotations for example between CONTRACT table within my database and COUNTRY table within our main database? what's the best practice to do this?

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  • php cookies block access to directories

    - by user342391
    I have a mysql database of users that can login to my site and view content. I would like to block a couple of directories from certain users. What is the best way to do this. Currently when a user logs in a cookie is created with their customer id and the customer is is used to display their content. How would I block entire directories from my users???

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  • What is the standard way to deploy memcached?

    - by Tom
    I have two IIS servers and two MySQL servers. On all servers I have some available memory (More than a GB). What is the standard way to deploy memcached? Should I add a new server especially for memcached, or should I use my existing servers? If so, which servers? Thanks in advance

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  • MySQLDump without locking the tables

    - by Raul Singahn
    It seems that if you have many tables, you can only perform a MySQLDump without locking them all, otherwise you can an error. What are the side effects of performing a MySQLDump without locking all the tables; Is the DB snapshot I get this way, consistent? Do I have any other alternative for getting a backup of a MySQL DB with many tables?

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  • How to split records per hour in order to display them as a chart?

    - by Axel
    Hi, I have an SQL table like this : sales(product,timestamp) I want to display a chart using Open Flash Chart but i don't know how to get the total sales per hour within the last 12 hours. ( the timestamp column is the sale date ) By example i will end up with an array like this : array(12,5,8,6,10,35,7,23,4,5,2,16) every number is the total sales in each hour. Note: i want to use php or only mysql for this. Thanks

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  • Installing databases after installation of server.

    - by claws
    Hello, I my software I need the client to install a database server (MySQL in my case). I'm deploying the setup and making user install it like a pre-requisite. After installing the DBMS server. I need to setup databases (that I created) on the client machine. How to do this automatically (as part of installation.)?

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  • filter duplicates in SQL join

    - by Will
    When using a SQL join, is it possible to keep only rows that have a single row for the left table? For example: select * from A, B where A.id = B.a_id; a1 b1 a2 b1 a2 b2 In this case, I want to remove all except the first row, where a single row from A matched exactly 1 row from B. I'm using MySQL.

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  • Search relevance from XML docs (XQuery?) vs MySQL

    - by Marius
    Hello there, I have a website where documents are saved in xml documents, all with the same structure. I need a search engine where I am able to choose documents with the highest relevance according to the key words given by a searching user. I thought it could (?) be a good idea to have one using XQuery rather than having the information stored twice (in XML docs + mysql database) and querying the mysql database for relevance searches. Is XQuery any good for this, and how, and what speed can I expect on +1000 documents of about 7kb each. Thank you for your time. Kind regards

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