Building an inventory system. I have lots of products and each product has three different variables. So for stock totals I want to group by the two columns (product & size) and sum quantity to get stock total.
product
Size
Quantity
Widget one
2
275
Widget one
2
100
Widget two
3
150
Widget two
2
150
What I want for output:
product
Size
Quantity
Widget one
2
375
Widget two
3
150
Widget two
2
150
I figured out how to group by one column and sum using the code below:
$query = "SELECT product, SUM(Quantity) FROM inventory GROUP BY product";
$result = mysql_query($query) or die(mysql_error());
// Print out result
while($row = mysql_fetch_array($result)){
echo "Total ". $row['product']. " = ". $row['SUM(Quantity)'];
echo "<br />";
}
?>
I am just stuck on grouping by both columns. Is it possible? or should I just create three different products for the of the three sizes and eliminate that column? Thanks.
Based on your example table, it appears you want to be grouping on product rather than id. You merely need to add the Size column to both the SELECT list and the GROUP BY
$query = "SELECT
product,
Size,
SUM(Quantity) AS TotalQuantity
FROM inventory
GROUP BY product, Size";
Note that I have added a column alias TotalQuantity, which will allow you to more easily retrieve the column from the fetched row via the more sensible $row['TotalQuantity'], rather than $row['SUM(Quantity)']
Related
I would like to take 2 tables from a MySql database and output 2 specific column's from each table and combine the values of the columns into a regular table of 4 columns using the UNION statement to weed through the duplicates.
I have 2 tables one is called (tblproducts) and the other (tblpricing)
There are 2 columns in each of the tables i want to display their values into a regular table.
(tbleproducts)
->name <-this is a column of product names
->description <- this is a column of descriptions of each product
(tblpricing)
->monlthy <--this is the monthly price
->annually <--this is the yearly price
You can see the tables displaying here
MY only problem is this code below, the Yearly and monthly does not display, just the name and description.
I have renamed the JOINS to opposite of each other and they will display the values of YEARLY and MONTHLY but in the wrong columns, so i know it is not the echo table code that is the problem. Its the order of wi
if ($result = $conn->query("SELECT tblproducts.description, tblproducts.name
FROM `tblpricing` RIGHT JOIN `tblproducts` on annually = tblproducts.id
UNION SELECT tblpricing.monthly, tblpricing.annually
FROM `tblproducts` LEFT JOIN `tblpricing` on monthly = tblpricing.id; "))
echo "<tr>";
echo "<td>" . $row->name . "</td>";
echo "</tr>";
(tbleproducts)
name
description
(tblpricing)
monthly
yearly
below are some links to pictures to help you.
Picture of both databases and oy complete code
I have 500 tables, all containing records of dollar amounts in the field "sales".
The following gets me the total sales of green items per table:
$tabletotal = mysql_query("SELECT sum(sales) FROM databasename.$tablename
WHERE type = 'green' AND descr LIKE '%SOLD%' ");
$row = mysql_fetch_assoc($tabletotal);
$answer= $row['sum(sales)'];
So if a particular table has 4 green items and they were sold for $4, $6, $7, and $3, then the answer I get above is $20.
Now, what I don't know how to do, is to get the total of all green items in ALL 500 tables. So if table 1 has a total of $20, table 2 a total of $36, table 3 a total of $15, and so on, I want to get the grand total in all tables together (in this case $71 but it would be more for 500 tables obviously).
Any help anyone?
Probably best to use a for loop:
$tables = array('tbl1', 'tbl2', 'tbl3', ..., 'tbl499');
$total = 0;
foreach ($tables as $t)
{
$tabletotal = mysql_query("SELECT sum(sales) tot FROM databasename.$t WHERE type = 'green' AND descr LIKE '%SOLD%'");
$row = mysql_fetch_assoc($tabletotal);
$total += $row['tot'];
}
Alternatively, you could generate a giant SQL query using UNIONs, but it's essentially the same thing.
As Dream Eater mentions; you shouldn't be in this situation in the first place.
I have a database table where I am storing all the values from an external xml file. Since my project requirement demands me to deal with this unnormalized data. I need to help to extract data in an appropriate way.
I have two web pages (one for categories) and one for products.My database table looks like this:
**product_id Code Name ProductRange ProductSubRange WebCategory**
1 1002 Lid 30l Crystal;Uni LIDs Household products
2 10433 Casa Basket Silver Casa Casa Hipster BASKET Kitchenware
3 17443 Casa Basket Ice White Casa;Laundry LAUNDRY BASKET Laundry products
4 13443 Garden tub Eden Eden Garden Pots Household products
5 199990 Black Lid 201 Crystal Crystal Lids Household products
The product that belong to more than one productRange is indicated my semicolon(;). For example,above product_id 1 with name "Lid 301" belongs to two Product Ranges "Crystal" and "Uni". Same is for product_id 3. However product 2 belongs to single ProductRange.
MY QUESTIONs:
1) How can I construct a query so that it could return "ProductRange" based on my query_string values of "Webcategory"? For example:
if I get "Household Products" as my WebCategory from query string, it could give me distinct like this:
Household Products
|-Crystal
|-Uni
|-Eden
Laundry Products
|-Casa
|-Laundry
Kitchenware
|-Casa
2) Based on extracted ProductRanges, I want to display products separately in my webpages according to the product range and webcategory. For example, if I choose "Crystal" from above, it could give me Products with product_id "1" and "5" respectively like this:
Household Products|
|-Crystal
|-Lid 301 (product_id=1)
|-Balck Lid 201 (product_id=5)
|-Uni
|-Lid 301 (product_id=1)
|-Eden
|-Garden Tub
Kitchenware|
|-Casa
|-Casa Basket silver
Laundry Products|
|-Casa
|-Casa Basket Ice White
|
|-Laundry
|-Casa Basket Ice White
Can anyone guide me how can I retrieve records from the database and what I will need to do as I am new to programming? I would appreciate if anyone could help me in this regard.
In order to get distinct product ranges based on a give WebCategory input = 'XYZ', you can use the following - don't be intimidated by the numberstable, it's just a helpful table that contains rows each with increasing integer values from 1 ... up to N where N is the maximum number of characters in your ProductRange column. These can be made by hand or using a special insert/select query like the one found here:
http://www.experts-exchange.com/Database/MySQL/A_3573-A-MySQL-Tidbit-Quick-Numbers-Table-Generation.html
SELECT DISTINCT
SUBSTRING(ProductRange FROM number FOR LOCATE(';', ProductRange, number) - number) AS ProductRange
FROM (
SELECT ProductRange, CASE number WHEN 1 THEN 1 ELSE number + 1 END number
FROM (
SELECT mydatabasetable.ProductRange, numberstable.number
FROM mydatabasetable
INNER JOIN numberstable
ON numberstable.number >= 1
AND numberstable.number <= CHAR_LENGTH(mydatabasetable.ProductRange)
WHERE WebCategory = 'XYZ'
) TT
WHERE number = 1 OR (number + 1) <= CHAR_LENGTH(ProductRange)
) TT
WHERE SUBSTRING(ProductRange FROM number FOR 1) = ';'
OR numberstable.number = 1;
In order to retrieve a result set with all values WebCategory, ProductRange and Product for your website you can use the below slightly modified version derived from the above query. So that the results will appear more meaningful at first, I added an ORDER BY clause to keep all same-category, same-product-range products in sequence one after the other. This might or might not be desired as you might prefer to do that in your application/server-script code. In that case you can remove the ORDER BY clause without doing any harm.
SELECT WebCategory,
SUBSTRING(
ProductRange
FROM number
FOR LOCATE(';', ProductRange, number) - number
) AS ProductRange,
Product
FROM (
SELECT WebCategory, ProductRange, Product,
CASE number
WHEN 1 THEN 1
ELSE number + 1
END number
FROM (
SELECT WebCategory, ProductRange, Product, numberstable.number
FROM mydatabasetable
INNER JOIN numberstable
ON numberstable.number >= 1
AND numberstable.number <= CHAR_LENGTH(ProductRange)
) TT
WHERE number = 1 OR (number + 1) <= CHAR_LENGTH(ProductRange)
) TT
WHERE SUBSTRING(ProductRange FROM number FOR 1) = ';'
OR numberstable.number = 1
ORDER BY WebCategory, ProductRange, Product
You are probably going to want to do a GROUP BY clause in your query and maybe an JOIN if the detailed data is in a different table. If I understand you correctly it would look something like this.
SELECT T.WebCategory, T.ProductRange, T2.Product FROM table T
INNER JOIN table2 T2 ON T2.ProductRange = T.ProductRange
WHERE T.WebCategory = 'Household products'
GROUP BY T.WebCategory, T.ProductRange, T2.Product
It is tough to test my query without having a database setup to test against, but something like the above should return what you are looking for. You will of course need to rename your columns based on the actual names in the second table. Overall though, this should get you started if I understood the question correctly.
I have a database table. It contains the folowing columns:
Cathegory | Priority |
Is there a finished script or a way to display statistics for these columns?
Basically what I am trying to do is show statistics for these columns.
For example,
cathegory can have different values, as an example: (Continent,
Country, City, Street).
Priority can contain a value between 1-10.
So I would need to display how many rows there are, the and the different values for each row.
For example:
4 of the priority 8 rows have 'continent' as catheogry,
43 of the priority 8 rows have 'country' as cathegory,
329 of the priority 8 rows have 'city' as cathegory
Is this possible?
There are no built-in scripts that can do that for you but certainly you get all that kind of information using SQL, that's the basic idea of a relational database.
Number of rows in table
select count(*) from table;
The example
select cathegory, count(cathegory) nbr_of_cathegories_for_prio_8 from table where priority = 8 group by cathegory;
In you example : 329 of the priority 8 rows have 'city' as cathegory
I assume that:
8 - is the priority value.
329 - how many time the priority is repeated for that specific priority for a specific category.
the PHP implimentation will look something like:
<?php
$sql = "
SELECT Priority, COUNT(Priority) as nbr_of_Priorities, cathegory,
FROM table_Name
GROUP BY Priority, cathegory
";
$result = mysql_query($sql);
while($row = mysql_fetch_array($result))
{
echo $row['nbr_of_Priorities'].'of the priority'.$row[' Priority'];
echo 'has'.$row['cathegory'].'as catheogry';
}
?>
Building an inventory system. I have lots of products and each product has three different variables. So for stock totals I want to group by the two columns (product & size) and sum quantity to get stock total.
product
Size
Quantity
Widget one
2
275
Widget one
2
100
Widget two
3
150
Widget two
2
150
What I want for output:
product
Size
Quantity
Widget one
2
375
Widget two
3
150
Widget two
2
150
I figured out how to group by one column and sum using the code below:
$query = "SELECT product, SUM(Quantity) FROM inventory GROUP BY product";
$result = mysql_query($query) or die(mysql_error());
// Print out result
while($row = mysql_fetch_array($result)){
echo "Total ". $row['product']. " = ". $row['SUM(Quantity)'];
echo "<br />";
}
?>
I am just stuck on grouping by both columns. Is it possible? or should I just create three different products for the of the three sizes and eliminate that column? Thanks.
Based on your example table, it appears you want to be grouping on product rather than id. You merely need to add the Size column to both the SELECT list and the GROUP BY
$query = "SELECT
product,
Size,
SUM(Quantity) AS TotalQuantity
FROM inventory
GROUP BY product, Size";
Note that I have added a column alias TotalQuantity, which will allow you to more easily retrieve the column from the fetched row via the more sensible $row['TotalQuantity'], rather than $row['SUM(Quantity)']