I have two tables product and condition where product_id is primary key of product and its foreign key in condition.
product
product_id name
1 eggs
2 milk
condition
product_id condition_name
1 new
2 bad
1 normal
I need a procedure which can give me the name of the all product which is not have bad condition.
You can simply use single query as follows:
select p.name
from product p
where not exists (select 1 from condition c where p.product_id = c.product_id
and c.condition_name = 'bad');
Related
I want to find the orders number from table#orders where DelivaryDateRevision less than max revisions from each country(table#maxrevisions). Countrycode is not the foreign key to the other table.
Can I fetch the orders table records if the country code is missing in the maxrevisions table.
Table: orders
OrderNumber | CountryCode | DelivaryDateRevision
123--------------- IN-------------------9
234--------------- US-------------------3
238-------------- IN------------------ 3
table: maxrevisions
CountryCode| MaxRevision
IN ---------------6
US--------------- 4
My query:
SELECT distinct o.ordernumber,o.countrycode
FROM orders o
left outer join maxrevisions m
on o.CountryCode=m.CountryCode
and
o.DelivaryDateRevision<rs.MaxRevision;
but I am getting the wrong result. Can I get any help here?
Your major omission seems to be a WHERE clause which compares the two revisions:
SELECT
o.ordernumber,
o.countrycode
FROM orders o
LEFT JOIN maxrevisions m
ON o.CountryCode = m.CountryCode
WHERE
o.DelivaryDateRevision < m.MaxRevision OR m.MaxRevision IS NULL;
Demo
Select
ordernumber,
countrycode,
deliverydateversion
from orders o
where deliverydateversion >
(
select max(revision)
from maxrevisiontab
where countrycode= o.countrycode
)
Please change the table names and column names as per your structure.
Im am trying to get a list of distinct values from one column whilst getting the key column data by inner join on another table as below..table a and table b hold key column of client.
Table b holds column product which has a range of values against a range of client numbers
Table a holds only client numbet
Table b holds client number and product
Client product
1. A
1. B
2. B
3. C
I want to find the list of distinct product values where the client is in table a and table b
Any suggestions welcome
find the list of distinct product values where the client is in table
a and table b
As you will notice below "distinct" isn't applied in joins
SELECT DISTINCT
b.Product
FROM TABLEA a
INNER JOIN TABLEB b ON a.Client = b.Client
;
The inner join ensures that client exists in both A and B and then the "select distinct" removes any repetition in the list of products.
SELECT
b.Product
, COUNT(*) AS countof
FROM TABLEA a
INNER JOIN TABLEB b ON a.Client = b.Client
GROUP BY
b.Product
;
An alternative, which also makes a distinct list of products where clients are in A and B is to use group by, with the added bonus that this way you can do some extra stuff like counting how often a product is referenced.
try it at SQLFiddle.com
I have a table with 2 columns ID, Name, Now I am trying to make a two different data with the same table that will come around 2 new tables but I want both the table rows merged into parent table.
I will explain with sample data:
Parent table:
ID Name
1 abc
2 def
I am writing a select query as
Select ID, Name||'_First' as a from table
This will give me
ID Name
1 abc_First
2 def_First
Now my another select query as
I am writing a select query as
Select ID, Name||'_Second' as b from table
This will give me
ID Name
1 abc_second
2 def_Second
Now I am trying to join both the queries and produce the parent table as
Tried like this:
Select ID,a,b from
(Select ID, Name||'_First' as a from table
Inner join
Select ID, Name||'_Second' as b from table)
on joins here
But this is producing me 3 columnslike
ID a b
1 abc_First abc_second
2 def_First def_Second
But I need as
ID Name
1 abc_First
2 def_First
1 abc_second
2 def_Second
I am stuck at this point.
Use union all
Select ID, Name||'_First' as name from table
union all
Select ID, Name||'_Second' as name from table
I have two tables in Oracle database (10g express)
product
product_image
One product can have multiple images. Hence, there a one-to-many relationship from product to product_image and the product_image table has a foreign key that refers to the primary key of the product table.
I need to fetch a list of products with only a single image name in each row of the result set being retrieved regardless of the images being in the product_image table (even though there are no images for some of products).
The image name to be retrieved from the product_image table is generally the first image name in the product_image table after sorting each set of images for each product in ascending order. Something like the following.
prod_id prod_name prod_image
1 aaa aaa.jpg //The first image name in the product_image table after sorting images for prod_id in ascending order.
2 bbb bbb.jpg //Similar to the first case.
3 ccc - //No image(s) found in the product_image table
4 ddd - //Similar to the previous case.
The general join statement for these two tables would be something similar to the following.
SELECT p.prod_id, p.prod_name, pi.prod_image
FROM product p
INNER JOIN product_image pi
ON p.prod_id=pi.prod_id;
Is this possible using a single SQL statement?
If I understood your question correctly I think the following query will work. I have not tested it.
SELECT p.prod_id, p.prod_name, MIN(DBMS_LOB.substr(pi.prod_image, 1))
FROM product p LEFT JOIN product_image pi
ON p.prod_id=pi.prod_id
GROUP BY p.prod_id, p.prod_name
ORDER BY p.prod_name;
Try this, you can generate row number for each image per prod_id and use that. To return null or blank from missing product image you should use left outer join
WITH CTE AS
(
SELECT prod_id, DBMS_LOB.substr(prod_image,1,4000) prod_image,
row_number() over (partition by prod_id order by prod_image) rn
FROM product_image
)
SELECT p.prod_id, p.prod_name, nvl(pi.prod_image,'-') prod_image
FROM product p
LEFT OUTER JOIN CTE pi
ON p.prod_id=pi.prod_id and pi.rn = 1;
The following SQL worked as mentioned in the question.
SELECT
p.prod_id,
p.prod_name,
t.prod_image
FROM
product p
LEFT OUTER JOIN(
SELECT
pi.prod_image_id,
pi.prod_id,
pi.prod_image
FROM
product_image pi
INNER JOIN (
SELECT
MIN(pi.prod_image_id) AS prod_image_id
FROM
product_image pi
GROUP BY
pi.prod_id
) prod_image
ON pi.prod_image_id=prod_image.prod_image_id
)t ON p.prod_id=t.prod_id ORDER BY p.prod_id DESC;
Reference:
SQL Select only rows with Max Value on a Column
I am working in Asp.Net 4.0 C#-- MVC-3. I have one problem and don't know how to solve. I have 4 tables and want to fetch data from that tables with LINQ.
TABLES
1) Project_Master
Field Names :
project_id (pk)
project_name
company_id (FK with company_master)
company_category_id (FK with Company_Category_master)
project_status_id (FK with Project_Status_Master)
2)Company_Master
Field Names :
company_id
company_name
company_category_id (FK with Company_Category_Master)
3) Company_Category_Master
Field Names :
Company_Category_Id
Company_Category_Name
4) Project_Status_Master
Field Name :
Project_Status_Id
Project_Status_Name
Below are the fields I need to fetch..(using LINQ Query)
Company_Name
Total completed project using status id(1)=complete (where staus 1 means completed)
Total Project
Company_category_name
So, how can I fetch data with linq query??
Thanks in advance...
Try the below example:
(From lse In Me.Leases, nty In Me.Entities, psg In Me.ProductionStages, lsg In LeaseStages _
Where lse.LeaseName = leaseName _
Select lse, lsg, nty, psg).Single
or you can use below example too:
var employeesQuery = from populationTable in db.Populations
join personTable in db.Persons on populationTable.Guid equals personTable.PopulationGuid
join employeeTable in db.Employees on personTable.Guid equals employeeTable.PersonGuid
select new { populationTable, personTable, employeeTable};