I need a query that can get me the document from a list of words for example if I use
select c from c join (SELECT distinct VALUE c.id FROM c JOIN word IN c.words WHERE word in('word1',word2) and tag in('motorcycle')) ORDER BY c._ts desc
it will bring both documents, I want to retrieve only the first one cause it matches the two words and not only one.
Document 1
"c": {
"id": "d0f1723c-0a55-454a-9cf8-3884f2d8d61a",
"words": [
"word1",
"word2",
"word3",
]}
Document 2
"c": {
"id": "d0f1723c-0a55-454a-9cf8-3884f2d8d61a",
"words": [
"word1",
"word4",
"word5",
]}
You should be able to cover this with two ARRAY_CONTAINS expressions in your WHERE clause (and no need for a JOIN):
SELECT c.id FROM c
WHERE ARRAY_CONTAINS(c.words, 'word1')
AND ARRAY_CONTAINS(c.words, 'word2')
This should return the id of your first document.
Related
I have following document structure:
{
"id": "1",
"aId": "2",
"bId": "3",
....
},
{ "id":"2",
"aId": "2",
"bId": "4"
}
How do i return for that JSON that has aId that has list of all bIds of the same aId, and as additional field: count of such bIds? So for example above and condtion: "WHERE aId="2" response would be:
{
"aId": "2",
"bIds" : ["4","3"],
"bIds count" : 2
}
Assuming i only pass one aId as parameter.
I tried something like:
select
(select 'something') as aId,
(select distinct value c.bId from c where c.aId='something') as bIds
from TableName c
But for love of me i cant figure out how to get that list + its count + hardcoded aId in single JSON response (single row)
For example this query:
select
(select distinct value 'someId') as aId,
(select distinct value c.bId) as bIds
from c where c.aId='someId'
will return
{ { 'aId': 'someId', 'bIds':'2'},{'aId':'someId','bIds':'4'}}
while what i acutally want is
{ {'aId':''someId', 'bIds':['2','4']}}
Here is query that is closest to what i want:
select
c.aId as aId,
count(c2) as bIdCount,
array(select distinct value c2.bId from c2)
from c join (select c.bId from c) as c2
where c.aId = 'SOME_ID'
Only thing line with array make this query fail if i delete this line it works (correctly returns id and count in one row). But i need to select content of this list also, and i ma lost why its not working, example is almost copypasted from "How to perform array projection Cosmos Db"
https://azurelessons.com/array-in-cosmos-db/#How_to_perform_array_projection_Azure_Cosmos_DB
Here is how you'd return an array of bId:
SELECT distinct value c.bId
FROM c
where c.aId = "2"
This yields:
[
"3",
"4"
]
Removing the value keyword:
SELECT distinct c.bId
FROM c
where c.aId = "2"
yields:
[
{ "bId" : "3" },
{ "bId" : "4" }
]
From either of these, you can count the number of array elements returned. If your payload must include count and aId, you'll need to add those to your JSON output.
I have two kind of record mention below in my table staudentdetail of cosmosDb.In below example previousSchooldetail is nullable filed and it can be present for student or not.
sample record below :-
{
"empid": "1234",
"empname": "ram",
"schoolname": "high school ,bankur",
"class": "10",
"previousSchooldetail": {
"prevSchoolName": "1763440",
"YearLeft": "2001"
} --(Nullable)
}
{
"empid": "12345",
"empname": "shyam",
"schoolname": "high school",
"class": "10"
}
I am trying to access the above record from azure databricks using pyspark or scala code .But when we are building the dataframe reading it from cosmos db it does not bring previousSchooldetail detail in the data frame.But when we change the query including id for which the previousSchooldetail show in the data frame .
Case 1:-
val Query = "SELECT * FROM c "
Result when query fired directly
empid
empname
schoolname
class
Case2:-
val Query = "SELECT * FROM c where c.empid=1234"
Result when query fired with where clause.
empid
empname
school name
class
previousSchooldetail
prevSchoolName
YearLeft
Could you please tell me why i am not able to get previousSchooldetail in case 1 and how should i proceed.
As #Jayendran, mentioned in the comments, the first query will give you the previouschooldetail document wherever they are available. Else, the column would not be present.
You can have this column present for all the scenarios by using the IS_DEFINED function. Try tweaking your query as below:
SELECT c.empid,
c.empname,
IS_DEFINED(c.previousSchooldetail) ? c.previousSchooldetail : null
as previousSchooldetail,
c.schoolname,
c.class
FROM c
If you are looking to get the result as a flat structure, it can be tricky and would need to use two separate queries such as:
Query 1
SELECT c.empid,
c.empname,
c.schoolname,
c.class,
p.prevSchoolName,
p.YearLeft
FROM c JOIN c.previousSchooldetail p
Query 2
SELECT c.empid,
c.empname,
c.schoolname,
c.class,
null as prevSchoolName,
null as YearLeft
FROM c
WHERE not IS_DEFINED (c.previousSchooldetail) or
c.previousSchooldetail = null
Unfortunately, Cosmos DB does not support LEFT JOIN or UNION. Hence, I'm not sure if you can achieve this in a single query.
Alternatively, you can create a stored procedure to return the desired result.
I want to return the count and data by writing it in a single Cosmos sql query.
Something like
Select *, count() from c
Or if possible i want get the count in a json document.
[
{
"Count" : 1111
},
{
"Name": "Jon",
"Age" : 30
}
]
You're going to have to issue two separate queries - one to get the total number of documents matching your query, and a second to get a page of documents.
I have stored the following JSON document in the Azure Document DB:
"JobId": "04e63d1d-2af1-42af-a349-810f55817602",
"JobType": 3,
"
"Properties": [
{
"Key": "Value1",
"Value": "testing1"
},
{
"Key": "Value",
"Value": "testing2"
}
]
When i try to query the document back i can easily perform the
Select f.id,f.Properties, C.Key from f Join C IN f.Properties where C.Key = 'Value1'
However when i try to query:
Select f.id,f.Properties, C.Key from f Join C IN f.Properties where C.Value = 'testing1'
I get an error that the query cannot be computed. I assume this is due to 'VALUE' being a reserved keyword within the query language.
I cannot specify a specific order in the property array because different subclasses can add different property in different orders as they need them.
Anybody any suggestion how i can still complete this query ?
To escape keywords in DocumentDB, you can use the [] syntax. For example, the above query would be:
Select f.id,f.Properties, C.Key from f Join C IN f.Properties where C["Value"] = 'testing1'
I have a usecase where for a given result value i want to reverse lookup all the search conditions defined that will give this as result.
So, I have a set of search conditions defined in a table as key value list. Each entry in this table is a search query. Now, I have a random value in dataset which can be result of any search entries defined in the table. I want to lookup that table so that for this value i can get all the search queries possible where this value would appear as its result.
The search table consist of fields search_conditions, search_table among other fields.
Schema would be like
Search_Table
id (long)
search_table_id (long)
search_conditions (json array as text)
This is value of one such search condition
[
{
"key": "name",
"operator": "equals",
"value": "jeff"
},
{
"key": "age",
"operator": "between",
"value": [
20,
40
]
}
]
Value that i have to search can be say a random user {"name": "mr x", "age":12}.
This may not be exactly a technology based question but its solution may require technology. Any help will be appreciated. The concern is more about optimization as this has to be done in real time.