I want to create a temporary table in linq query. I have searched for the solution but didn't succeeded.
here "Node" is temporary table,and "Organization.TblOrganizationUnits" is table in my database.
In linq, How can i create a temporary table and how can I perform different joins and union operation of the above query.
my sql query is:
string query=string.Format(#"WITH Node (OrganizationUnitId, UnitName,ParentUnitId)
AS (
SELECT Organization.TblOrganizationUnits.OrganizationUnitId, Organization.TblOrganizationUnits.UnitName , Organization.TblOrganizationUnits.ParentUnitId
FROM Organization.TblOrganizationUnits
WHERE OrganizationUnitId ={0}
UNION ALL
SELECT Organization.TblOrganizationUnits.OrganizationUnitId, Organization.TblOrganizationUnits.UnitName, Organization.TblOrganizationUnits.ParentUnitId
FROM Organization.TblOrganizationUnits
INNER JOIN Node
ON Organization.TblOrganizationUnits.ParentUnitId = Node.OrganizationUnitId
)
SELECT OrganizationUnitId, UnitName,ParentUnitId FROM Node
where OrganizationUnitId not in (SELECT ParentUnitId FROM Node)
option (maxrecursion 0); ", OrganizationUnitId);
Related
This is a pretty straightforward update statement that works on SQL Server DB and I have re-written it in Databricks which is not working, Can you provide your suggestions?
update
a
set
composite_account_key=nvl(e.account_key,0)
edw.account_fact a
join edw.account_dim b on (a.account_key=b.account_key)
join vw_account_hier c on (b.accountcode=c.accountcode)
join edw.analysis_codes_dim d on (d.anlys_code_dimkey=a.anlys_code_dimkey and c.atomic_anlys_appl_cde=d.anlys_appl_cde)
join vw_composite e on (c.edw_c_account_code=e.edw_c_account_code)
where
a.timekey='95'
ParseException:[PARSE_SYNTAX_ERROR] Syntax error at or near 'from'(line 5, pos 0)
The syntax of update statement in Databricks SQL does not support using from parameter.
You can create a temporary view from the result of all the join operations and use this view in the update statement directly instead.
The following is the demonstration of the same. I have the result of my join query as shown below:
When I try to use from parameter directly in update statement (update id value to 10 wherever it is 1 from join result), I get the same error.
So, I have created a view first and then used it in update query to get the result.
%sql
--CREATE TEMPORARY VIEW for_updt as (select a.id,a.gname,b.team from demo as a join demo1 as b on a.id=b.id );
update demo set id=10 where id in(select id from for_updt where) and (demo.id=1)
All of the documentation for Cosmos DB and it looks like it only supports the JOINkeyword, which seems to be a sort of INNER JOIN.
I have the following query:
SELECT * FROM
(
SELECT
DISTINCT(c.id),
c.OtherCollection,
FROM c
JOIN s IN c.OtherCollection
)
AS c order by c.id
This works fine and returns the data of documents that have OtherCollection populated. But It obviously does not return any documents that do not have it populated.
The reason for the join is that sometimes I execute the following query (queries are built up from user input)
SELECT * FROM
(
SELECT
DISTINCT(c.id),
c.OtherCollection,
FROM c
JOIN s IN c.OtherCollection
WHERE s.PropertyName = 'SomeValue'
)
AS c order by c.id
The question is how can I have a sort of LEFT JOIN operator in this scenario?
CosmosDB JOIN operation is limited to the scope of a single document. What possible is you can join parent object with child objects under same document.
It is totally different from SQL Join query which supports across two/many tables.
You can simulate LEFT JOIN with the EXISTS sentence.
Eg:
SELECT VALUE c
FROM c
WHERE (
(c.OtherCollection = null) OR EXISTS (--Like a "Left Join"
SELECT null
FROM s IN c.OtherCollection
WHERE s.PropertyName = 'SomeValue'
)
)
--AND/OR Some other c Node conditions
order by c.id
Is it possible to use .QueryMultiple (or some other method) in Dapper, and use the results of each former query to be used in the where clause of the next query, without having to do each query individually, get the id, and then .Query again, get the id and so on.
For example,
string sqlString = #"select tableA_id from tableA where tableA_lastname = #lastname;
select tableB_id from tableB WHERE tableB_id = tableA_id";
db.QueryMultiple.(sqlString, new {lastname = "smith"});
Is something like this possible with Dapper or do I need a view or stored procedure to accomplish this? I can use multiple joins for one SQL statement, but in my real query there are 7 joins, and I didn't think I should return 7 objects.
Right now I'm just using object.
You can store every previous query in table parameter and then first perform select from the parameter and query for next, for example:
DECLARE #TableA AS Table(
tableA_id INT
-- ... all other columns you need..
)
INSERT #TableA
SELECT tableA_id
FROM tableA
WHERE tableA_lastname = #lastname
SELECT *
FROM #TableA
SELECT tableB_id
FROM tableB
JOIN tableA ON tableB_id = tableA_id
I searched a lot about sorting elements by sum of votes (in another model), like I do in SQL here :
SELECT item.* FROM item
LEFT JOIN (
SELECT
vote.item,
SUM(vote.value) AS vote.rating
FROM vote
GROUP BY vote.item
) AS res ON item.id = vote.item
ORDER BY res.rating DESC
Is there a way to do it via waterline methods ?
I think you can't do the left join with simple waterline methods, but you can use the .query method to execute your raw SQL syntax.
Sails MySQL adapter makes sum('field') conflict with sort('field'). It will generate SQL query like:
SELECT SUM(table.field) AS field FROM table ORDER BY table.field;
But I want:
SELECT SUM(table.field) AS field FROM table ORDER BY field;
It same as:
SELECT SUM(table.field) AS f FROM table ORDER BY f;
My solution is using lodash.sortBy() to process results. https://lodash.com/docs/4.16.4#sortBy
I'm trying to run a similar query:
sql = #"with t(id) as (select 1 )
select * from Project
where id > (select id from t)";
var projects = this.Db.Query<Project>(sql).ToArray();
For some reason the OrmLite decides to treat the sql as as "where" clause, so what ends up running is something like this:
select field1, field2 from project where with t(id) .....
Does it look for a "select" at a starting position of the query ?
Short of creating a view - is there a way to run query with CTE ?
Use the db.Sql* API's for raw SQL Queries, e.g:
var projects = db.SqlList<Project>(sql);