Basically i would like to add a new column in a table entitled product (mainly clothes) which contains 2 columns :
- ProductID (int)
- path (varchar) which is like something |x|y|z| (for example |10|300|5| with 10 indicated that the product is a woman cloth, 300 a t-shirt, and 5 yellow).
So i would like to add a new colum called index in order to allocate in my website a specific place for each products (for example the first picture will be a jean, the second one a coat, the 3rd a t-shirt, etc...). I have 8 zones with the possibility to extend this zone to 8 more, and so on.
I am trying to write an SQL update function such like this :
UPDATE productsTable
SET indexproducts =
SELECT CASE path WHEN path LIKE %|1 for example|%
THEN my index (this index should indicate that the product can be included in the first zone or the 9th zone etc... of my website)
ELSE WHEN path LIKE %|200 for example|%
THEN my index ( for the second zone) ELSE etc?...
END
FROM productsTable.
Any suggestions?
Example syntax:
update YourTable
set idx =
case
when path like '%least travelled%' then 1
when path like '%highway%' then 2
else 3
end
I did not understand your logic on what would be in the indexproducts column, but why not create a computed column:
alter table productsTable add indexproducts as
case path
when '1' then 'include on the first zone'
when '200' then 'second zone'
else '...'
end
then you can create an index on the indexproducts column
Related
How can I delete duplicate data based on the common value (Start and End)
(Time is unique key)
My table is:
Time
Data
10:24:11
Start
10:24:12
Result
10:24:13
Result
10:24:14
End
10:24:15
Start
10:24:16
Result
10:24:17
End
I want to get Data: Result in between Start and End that is with the MAX(TIME) when duplication does occur. as such
The result that I want:
Time
Data
10:24:11
Start
10:24:13
Result
10:24:14
End
10:24:15
Start
10:24:16
Result
10:24:17
End
I have tried rearranging the data, but couldn't seems to get the result that I want, Could someone give their advice on this case?
Update
I ended up not using either of the the approach suggested by #fredt and #airliquide as my version of HSQLDB doesn't support the function.
so what I did was, adding sequence and making Start = 1, Result = 2, and End = 3.
Sequence
Time
Data
Indicator
1
10:24:11
Start
1
2
10:24:12
Result
2
3
10:24:13
Result
2
4
10:24:14
End
3
5
10:24:15
Start
1
6
10:24:16
Result
2
7
10:24:17
End
3
Thereon, I make use of the indicator and sequence to get only latest Result. Such that if previous row is 2 (which is result), remove it.
The guide that I follow:
From: Is there a way to access the "previous row" value in a SELECT statement?
select t1.value - t2.value from table t1, table t2
where t1.primaryKey = t2.primaryKey - 1
Hi a first approach will be to use a lead function as folow
select hour,status from (select *,lead(status,1) over ( order by hour) as lead
from newtable)compare
where compare.lead <> status
OR lead is null
Give me what's expected using a postgres engine.
You can do this sort of thing with SQL procedures.
-- create the table with only two columns
CREATE TABLE actions (attime TIME UNIQUE, data VARCHAR(10));
-- drop the procedure if it exists
DROP PROCEDURE del_duplicates IF EXISTS;
create procedure del_duplicates() MODIFIES SQL DATA begin atomic
DECLARE last_time time(0) default null;
for_loop:
-- loop over the rows in order
FOR SELECT * FROM actions ORDER BY attime DO
-- each time 'Start' is found, clear the last_time variable
IF data = 'Start' THEN
SET last_time = NULL;
ITERATE for_loop;
END IF;
-- each time 'Result' is found, delete the row with previous time
-- if last_time is null, no row is actually deleted
IF data = 'Result' THEN
DELETE FROM actions WHERE attime = last_time;
-- then store the latest time
SET last_time = attime;
ITERATE for_loop;
END IF;
END FOR;
END
Your data must all belong to a single day, otherwise there will be strange overlaps that cannot be distinguished. It is better to use TIMESTAMP instead of TIME.
I'm using Oracle apex, and i have 2 select list components that get the elements from the same table. i want build a currency converter, and the list of currency are "divisas"
My problem is: i want validate that when on one select component, one value is selected, the other component doesn't contain that element from select list 1. And vice verse
Also when on select 1 is null on the select 2 must show all result from the table, and vice verse.
I start with this query, but i can't do it works
select *
from divisas
where EN_APP = 'S'
and (
case when :P12_DIVISA is not null then (cod_divi <> :P12_DIVISA) else EN_APP = 'S' end
)
;
can somebody help me?
There's the Cascading List of Values property for Select List items. However, as you want to handle both items at the same time, you'll enter circular reference & dead loop so it won't just work.
Here's an option which does what you wanted; see if it helps:
create two items, e.g. P59_CURR_1 and P59_CURR_2 (for two currencies)
their type is Select List item
Page action on selection = "Redirect and set value"
SQL query looks like this (for P59_CURR_1)
select cod_divi d, cod_divi r
from divisas
where cod_divi <> nvl(:P59_CURR_2, 'X') -- would be `:P59_CURR_1` for another item
order by cod_divi
don't set cascading list of values parent item!
That's it; run the page and see how it behaves. Looks OK to me on apex.oracle.com's Apex 20.1 version.
I am using Visual Studio 2017 and I installed the latest crystal reportviewer (22)
What I want is to click a button and create a report from the customer that is selected in the datagridview and the addresses that are shown in the second datagridview.
I managed to do all that but the problem is that a few fields contain numbers which need to be converted to text. An SQL query I would use to do this would be like:
SELECT c.customer_nr, c.status, s.rename FROM CUSTOMERS c INNER JOIN SETUP s on s.id = c.status WHERE s.afk = 'STA'
In my SETUP database I have the columns ID,AFK and RENAME so if the status would be 1 it would convert to text: "ACTIVE", if status = 2 it would convert to "INACTIVE" for example.
I could do something with a formula field like this:
IF ({c.status} = 1) THEN "ACTIVE" ELSE
IF ({c.status}) = 2 THEN "INACTIVE"
but that is not good because i could add another status or change the name in the database etc.
So then I tried with an SQL expression field and I put something like this:
(
SELECT "SETUP"."RENAME" FROM SETUP
WHERE "SETUP"."AFK" = 'STA' AND "SETUP"."ID" = "CUSTOMERS"."STATUS"
)
There must be something wrong because I get the correct conversion but there is only one address in the database but I get 7 pages all with the same address. There should only be one address like I get when I remove the SQL expression field. Where does it go wrong?
* EDIT *
I found the problem. When I create a new database that contains only unique id's then it works. In my original database I have multiple times the id's 1,2,3,4,5 but with different abbreviations in column AFK. Somehow the query looks for the id value and every time it finds this id no matter the AFK value it generates an entry for the address value.
Maybe in the future I will find out how this exactly works for now I have a workaround.
Create a new table for example CrRepSta and add the following entries:
ID,AFK,RENAME
1,STA,Active
2,STA,Inactive
etc
The new query:
(
SELECT "CrRepSta"."RENAME" FROM CrRepSta
WHERE "CrRepSta"."AFK" = 'STA' AND "CrRepSta"."ID" = "CUSTOMERS"."STATUS"
)
And by the way the statement "CrRepSta"."AFK" = 'STA' is not really needed.
I've been trying to search for a similar query on stackoverflow to modify to get what I need but I can't seem to get it right. I hope someone here can help.
I have two tables located in two different databases. Both databases are configured on the same server. Table 1 called 'DiscreteLive' and located in Database 'Runtime'. Table 2 is called 'v_DiscreteHistory' and located in Database 'WWALMDB'.
They have the following fields
DiscreteLive
Tagname (type String)
Value (type Integer --> can only ever be 1 or 0)
'v_DiscreteHistory'
Tagname (type String)
Value (type String --> can only ever be true of false)
EventStamp (type datetime)
Description (type String)
The 'DiscreteLive' table can only ever have one unique tagname line. An external software will overwrite to each tagname's corresponding Value field. It's basically showing the live values of the system. Example shown below. For example, you would never find Device1.Commfail twice in this table.
Device1.Commfail
Device1.Auto
Device1.Man
Device2.Commfail
Device2.Auto
Device2.Man
Device3.Commfail
Device3.Auto
Device3.Man
Device4.commfail
Device4.Auto
Device4.Man
Device5.Commfail
Device5.Auto
Device5.Man
etc.
The 'v_DiscreteHistory' table is the history of the specific tag. There can be multiple entries of the same tag along with its Description and EventStamp (Time the even happened).
What I'm trying to do is to filter out the 'DiscreteLive' table to show only the tag values where the tagname is a %.CommFail and the Value is 1. Then I would like to take the result of that initial query and attach the latest EventStamp and Description for those tags in the initial query from 'v_DiscreteHistory'.
Not sure if this can be done. Let me know if you need more clarification.
SQL Server: This might be what you are looking for
SELECT
D.TagName
,D.Value
,V.Tagname
,V.Value,V.EventStamp
,V.Description
,MAX(V.EventStamp) AS 'LatestDate'
FROM
SERVER.Runtime.dbo.DiscreteHistory D
INNER JOIN
SERVER.WWALMDB.dbo.v_DiscreteHistory V
ON
D.Tagname = V.Tagname
WHERE
D.Value = 1
AND
V.Value LIKE '%.CommFail'
GROUP BY
D.TagName
,D.Value
,V.Tagname
,V.Value,V.EventStamp
,V.Description
Having a mental block with going around this query.
I have the following tables:
review_list: has most of the data, but in this case the only important thing is review_id, the id of the record that I am currently interested in (int)
variant_list: model (varchar), enabled (bool)
variant_review: model (varchar), id (int)
variant_review is a many to many table linking the review_id in review_list to the model(s) in variant_list review and contains (eg):
..
test1,22
test2,22
test4,22
test1,23
test2,23... etc
variant_list is a list of all possible models and whether they are enabled and contains (eg):
test1,TRUE
test2,TRUE
test3,TRUE
test4,TRUE
what I am after in mysql is a query that when given a review_id (ie, 22) will return a resultset that will list each value in variant_review.model, and whether it is present for the given review_id such as:
test1,1
test2,1
test3,0
test4,1
or similar, which I can farm off to some webpage with a list of checkboxes for the types. This would show all the models available and whether each one was present in the table
Given a bit more information about the column names:
Select variant_list.model
, Case When variant_review.model Is Not Null Then 1 Else 0 End As HasReview
From variant_list
Left join variant_review
On variant_review.model = variant_list.model
And variant_review.review_id = 22
Just for completeness, if it is the case that you can have multiple rows in the variant_review table with the same model and review_id, then you need to do it differently:
Select variant_list.model
, Case
When Exists (
Select 1
From variant_review As VR
Where VR.model = variant_list.model
And VR.review_id = 22
) Then 1
Else 0
End
From variant_list