1.) how to numerically increase or decrease the value of a mySQL column
2.) what is the best column structure (e.g. "varchar" or "char" etc.)
for speediest increasing/decreasing
Here is the idea:
I sell fruit. I start with 100 apples, 100 bananas, and 100 grapes.
Visitor purchases 8 apples so now I have 92 of them left. What is the
exact mysql query statement that I would use (the following is wrong,
but gives idea what I'm trying to do):
mysql_query("update fruit_table set quantity_left = 92 where fruit =
Also, what would be the best table structure for the quantity part. Is
this the best?
CREATE TABLE fruit_table (
fruit tinytext NOT NULL,
quantity_left int(3) unsigned zerofill NOT NULL default ༼'
I am trying to do the following1. receive input via a form2. From the submitted variables, check the email in the database table and then pick the number field i want to subtract from3. subtract the value from the submitted form from the value in the amount field in the database (I want to verify that the submitted value is less than the value in the database field)4. Update the database with the value of the subtraction...5. redirect to another pageI have written a script and when i run it, it does nothing.. I need experienced php programmers to please take a look and modify if necessary.
<? $host="localhost"; // Host name $username="root"; // Mysql username [code].........
I want to update the quantity (which is a text field) of a specific item (having an item#) BUT if there multiple rows chosen in the item list, (i.e you can have 4 rows and you update the quantities on each. How can you update the Database with a single submit button? So that the corresponding item# gets updated with the correct quantity. All values of the list are chosen from an mySql query.
Iâ€™m building a site with live stock figures on, where account customers can order online and the order goes into a database, which someone can then retrieve at a later point. But I donâ€™t know the correct formula to minus the ordered amount off the original quantity, I know how to store the details of the order in the database but not how to make the database update the quantity.
I'm makigna rather big database with some information. I have one table at the moment, expected to be round about 5 more in the future.
I have about 11 milion rows in my single table right now, expected to be round about 100 - 500 million. My tables are in a structured way, to further increase optimation, only two columns.
My tables basically stores words/letters and similar things.. My problem is that working with these large tables/databases is not the fact that it takes allot of disk space, but the actual load time. Code:
how to add 60 days to a mysql stored DATE, then subtract the current date from that date to see how many days there are... Its for a 60 day trial and when they signed up, it put the date in which they signed up in the database table... Here's what I have, but it's not working... But I can't get it to add 60 days to a mysql stored DATE,... then of course I have to figure out how to do the subtraction...
Code: [Select]$CustomerSaasDateStarted = $row['CustomerSaasDateStarted']; $CustomerSaasDateStartedPlusSixtyDays = date("Y-m-d", strtotime($CustomerSaasDateStarted, "+60 days")); // Test Output echo 'Date Trial Started: '.date("M d, Y", strtotime($CustomerSaasDateStarted)); echo '<br />'; echo '60 days from Date Trial Started: '.date("M d, Y", strtotime($CustomerSaasDateStartedPlusSixtyDays)); echo '<br />';
I have a Page that Displays products (check out www.lgiengineers.com/WebStore/Store/index.php)
In this page products are listed. The Color/Size combination (if applicable) are listed along with a quantity box for EACH attribute combination. Each Product has a AddToCart button.
What I wanna do is give the Shopper the ability to enter quantities for multiple attribute combinations of the same product and then have those products added to the cart with one button click. PHP Code:
Right at the moment I have an inventory program that I was developing.It works great, for single quantity items, but now I'm getting to the point of making orders of 2-100, and I need to decrement the count of items when adding them to orders, so the quantities are updated.heres how my sql table looks.
PHP Code: CREATE TABLE `_products` ( `productID` int(25) NOT NULL auto_increment, `batch` varchar(10) collate latin1_german2_ci NOT NULL, [code]....
Building a store application for a client that makes use of a web service from a larger agency as a broker.This web service requires that items for purchase by end users be of a certain quantity or else the order will be considered ineligible for purchase.dropdown option boxes that contain only eligible quantity numbers.A quantity greater than 12 is available, then allow any quantity EXCEPT that which would leave only one item remaining.If a quantity of less than 12 is available and said quantity is even, then allow only even pairs for purchase.
If a quantity of of less than 12 is available and said quantity is odd, then allow any quantity except that which would leave only one item remaining.How conditionals to determine dropdown content should be structured to accommodate this.via conditionals, whether the final quantity vs the user's requested quantity would leave just one for purchase and thereby deny it?imagine why the service issuer did not make it so an array of eligible quantities was returned rather than a hard number.
Allow users to update quantities in the database, by providing them some input fields, know that the sql update query is perfect, because if DON'T use the foreach loop, it will submit and update the last textfield only.But need the foreach loop so it will loop through all the textfields and update them all in the database.updating with this foreach loop?
I'm new to PHP and i just started an internship that required me to post an inventory on a web page. I've been stuck on this adding a drop down menu to select between the tables and putting in four buttons (ADD/REMOVE/NEW/DELETE) for two days and my deadline is coming up fast. Here's the code.
I have the following models: Recipe and Ingredient. I want to define the two in a HasAndBelongsToMany relationship, but the complication comes from the following: I want recipes to be able to possess a quantity of each ingredient.Quantity will be defined by two fields: Amount and Unit. So on an abstract level here's an example of what I want to see/be able to query:
I have 2 tables, contains orders, & orders contents (i.e.,orders table, & o_contents), & I'd like to get statistics from these two tables, to see the sold quantities during an interval, a month, week, year, or even yesterday!here are the tables fields:orders table:
Master table has duplicate ORDERNO and ITEM values. I have get total QTY using SQL 'GROUP BY' clause.I need to deduct/subtract BAL_QTY from SUM of ITEM (master_table). I've got SUM QTY value using query (actually there are many rows).
I have a table that this board helped me build. However I still need some help. I have over 50 automotive lenders in my table that all have different rates and "discounts".
Their is a base_rate, special_discount, equity_discount, luxury_discount, and other_discount. I have a simple form that a user would type in score, term, year model, loan to value percentage(ltv), amount to finance.
I can list out all of the available discounts no problem. But what I am trying to do is get a net rate base on the information suppled to me. It might take modifying my table and that is fine with me. Their are 4 possible discounts. 1st is the special_discount. This is to be subtracted always, if it is stored in the record it needs to be subtracted from the base_rate. 2nd is the equity discount. This is to only be subtracted from the base rate if the user typed in a lower ltv than the low_ltv in the record. Also, if they are financing over 25k (luxury discount) some will give .25% off. Any ideas on how this newbie can make it work?
What would be the easiest way to this in sql: I need to subtract 100 from column `foo`, but if doing this makes the value of `foo` less than 0, then I need it to add 1 to column `bar`. Is there an IF command that would allow me to do this, or would i have to compare and subtract the values for each row individually?
What function simply subtracts one string from another and outputs the result? As in, takes the string 3.145667 and subtracts 3.14 to get 5667. I've tried a few, but for some reason the server didn't recognize the only one I found that seemed to match the description.
I have an array of common words: $common = array(a,the,about,is,from,to,go); and a string that is a long paragraph of words. $words(It could of course be turned into and array as well.)What I want to do is to remove the common words from my string and I am not sure if I should do this with a regex, or a foreach loopor if there is a particular array function that would suit the purpose.I have looked through the array function list but can not see anythingspecifically for this. I could perhaps use the change $words into an arrayand use the in_array($words)What would you recommend as the best way to do this ?
my times are set to $date = date('D M d, Y g:i a'); And this works fine posting data to MySQL but how do I get it so that it can take the time posted in the mysql which has the rowname `postdate` and subtract the time now so it can display something like: "POSTED PIREP 1365 Minutes Ago" You know? Any suggestions?
I think I'm overcomplicating things so I thought I'd ask if there is a better way to subtract two dates. Plus, my way is not very accurate. Its a few days off... Both dates come from MySQL in the format "YYYY-MM-DD".
This seems like a fairly simple question, but I'm having trouble with it!In my database, I have two fields that have times in them. Let's say one field, named clockin, reads "2:29:39 pm," and another field, named clockout, reads "2:29:39 pm."Then I have two other fields, one titled "breakin" which reads 2:28:37 pm and breakout which reads "2:28:55 pm". I want to subtract breakout from break in to get the difference, and then take that number and subtract it from the difference between clockin and clockout.How can I do this? Here's what I've tried:
$clockout = new DateTime($row['clockout']); $clockin = new DateTime($row['clockin']); [code]....
I'm pulling a date value (not a datetime value) from a MySQL database, but I need to subtract 30 days from that date, and not sure how to do it. I found a sample using mktime() to break up the day-month-year and subtracting 30 days from the 'day' component, but the result is all wacky.
I have a members database. I want to display a "NEW" icon for members that have been members less than let's say 30 daysI use a DateTime field in the database for dates when people sign up.How can I do this?Somethi like
PHP Code: $todaysdate = date('Y-m-d G:i:s'); $subtract_date = $todaysdate - 30; //I know this is wrong, but just wanted to show what I want [code]...
i have written a piece of code that adds a % of a whole when a button is selected, what i need to do is to have the option of un selecting the button and having the % taken off. here is the code i have for adding the % and totalPHP Code: