I am working on oracle hierarchical query for the below table
Classification_Product and Order_details tables
Classification Product has the Classification_id which will be stored in the Order_detailsaccording to user selection
Classification Product table
Order_details table
I want to select all products from Order_details table that has a parent LED Screen which will return all product that has parent LED Screen no matter what the child is 32inch or 50 inch or sony samsung etc etc
I tried to use below query but its replate rows a lot
SELECT B.CLASSIFICATION_ID, LEVEL AS VLEVEL, A.CATEGORY_ID, A.CATEGORY_DESC, CONNECT_BY_ISLEAF AS leaf
FROM PRODUCT_CLASSIFICATION A, ORDER_DETAILS B
WHERE A.STATUS = 1 and b.created_on like sysdate--AND leaf =1
START WITH A.CATEGORY_ID IS NULL
CONNECT BY A.CATEGORY_ID = PRIOR A.CLASSIFICATION_ID
ORDER SIBLINGS BY A.CLASSIFICATION_ID;
select od.*
from order_details od
where
od.classification_id in (
select p.classification_id
from product p
start with p.category_desc = 'LED Screen'
connect by prior p.classification_id = p.category_id
)
Related
I have 2 tables.
This is tableA
(invoice,D/O, cost..) and
Table B
(D/O, GRN, Qty)
Now how to use query to show table A include GRN,Qty
See
You need a LEFT OUTER JOIN to retrieve all the records from table A with matched records from table B.
Guessing at the join criteria because your question doesn't say what they are:
select a.*
, b.grn
, b.grn_line
, b.qty_grn
from a
left outer join b
on a.do = b.do
and a.do_line = b.do_line
and a.invoice_line = b.grn_line
In my oracle 11g database, I have two tables. The first, accitem, holds item information and the second, acchart holds chart information. Every row in table accitem is unique. There are no repetitions. In the other table, acchart item_type refers to a foreign key in the acchart table. It looks like so:
Accitem
ID Details
BS Balance sheet
PL Profit & loss
acchart
item_code item_description item_type
INC Income PL
EXP Expenses PL
Ass Assets BS
Eqt Equity BS
What I want to achieve is as follows:
Balance Sheet
+ Assets
+ Equity
Profit & Loss
+ Income
+ Expenses
How would you achieve that?
You can indeed use connect by:
select decode(level, 2, ' + ', '')||q.name from
(
select ID, Details name, null parent_id
from accitem
UNION ALL
select null ID, item_description name, item_type parent_id
from acchart
) q
start with parent_id is null
connect by prior id = parent_id
Its performance is questionable on larger datasets though.
I have set of tables in my data base like table A which has set of set of categories , table B set of repositeries. A and B are related by categoryid. And then table C which has set of properties for a repoId. Table C and A are associated with repoId.
Table C can have multiple values for a repoId.
The data in C table is like a property say a number string like 12345XXXX (max data of 10 characters) and I have to find the top 6 matching characters of a particular value in table C and the count of repoIds associated with those top 6 value for a particular data in table A (categoryid).
Table A(set of categories ) ---------> Table B (set of repositories, associated with A with categoryid)---------> Table V (set of FMProperties against a repoId)
Now currently, this has been achieved by using joins and substring queries on these tables and it is very slow.
I have to achieve this functionality using Elastic search. I dont have clear view how to start?
Do I create separate documents / indexes for table A , B and C or fetch the info using sql query and create a single document.
And how we can apply this analytics part explained above.
I am very new and amateur in this technology but I am following the tutorials provided at elasticsearch site.
PFB the query in mysql for this logic:-
select 'fms' as fmstype, C.fmscode as fmsCode,
count(C.repoId) as countOffms from tableC C, tableB B
where B.repoId = C.repoId and B.categoryid = 175
group by C.fmscode
order by countOffms desc
limit 1)
UNION ALL
(select 'fms6' as fmstype, t1.fmscode, t2.countOffms from tableC t1
inner join
(
select substring(C.fmscode,1,6) as first6,
count(C.repoId) as countOffms from tableC C, tableB B
where B.repoId = C.repoId and B.categoryid = 175 and length(C.fmscode) = 6
group by substring(C.fmscode,1,6) order by countOffms desc
limit 1 ) t2
ON
substring(t1.fmscode,1,6) = t2.first6 and length(t1.fmscode) = 6
group by t1.fmscode
order by count(t1.fmscode) desc
limit 1)
I have a table pa_master_details and lov_details.
In the pa_master_details table, I have role_comp_emp_final_rating and role_comp_lm_final_rating columns.
In the lov_details table I have a column rating lov_value and lov_text_en.
I need to join role_comp_emp_final_rating with the lov_value column to get lov_text_en
Based on this lov_value, I need to show lov_text_en from the lov_details table.
So I wrote a query like this and am getting the result for emp rating:
SELECT p.employee_number,
p.role_comp_emp_final_rating,
lov_text_en,
p.role_comp_lm_final_rating
FROM pa_master_details P, lov_details L
WHERE p.role_comp_emp_final_rating = l.lov_value
AND p.employee_number = 34570
Similarly, I need to show lov_text_en for role_comp_lm_final_rating from the lov_details table by joining
role_comp_lm_final_rating with lov_value in the same query.
How do I do it?
I think this is what you're asking for:
SELECT p.employee_number,
p.role_comp_emp_final_rating,
lemp.lov_text_en AS "emp_lov_text",
llm.lov_text_en AS "lm_lov_text",
p.role_comp_lm_final_rating
FROM pa_master_details p
JOIN (SELECT lov_text FROM lov_details) lemp ON p.role_comp_emp_final_rating = lemp.lov_value
JOIN (SELECT lov_text FROM lov_details) llm ON p.role_comp_lm_final_rating = llm.lov_value
WHERE p.employee_number = 34570
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