I am collecting some data from database using var query and storing it in an integer. Below is the code:
var query1 = from meet_emp in db.Meet_Emps
where meet_emp.Employee_ID == empid
select meet_emp.Meeting_ID;
int meetNum = query1.First();
Here query1 contains multiple meeting ids. I wish to store all id's into an int variable or int array as I would be using each meeting id later into another query. With syntax "int meetNum = query1.First()", I get only the first meeting id.
How do I get all the meeting id's
You can leave the data just as it is in variable query1, then join it later with your final query that uses that list:
from blah in db.Stuff
join query1 on query1.Meeting_ID equals blah.Meeting_ID
select ...;
Just change to ToList then you will have a list of IDs
var query1 = from meet_emp in db.Meet_Emps
where meet_emp.Employee_ID == empid
select meet_emp.Meeting_ID;
var meetNum = query1.ToList();
Related
I'm trying to replace a placeholder string inside a selection of 10 random records with a random string (a name) taken from another table, using only sqlite statements.
i've done a subquery in order to replace() of the placeholder with the results of a subquery. I thought that each subquery loaded a random name from the names table, but i've found that it's not the case and each placeholder is replaced with the same string.
select id, (replace (snippet, "%NAME%", (select
name from names
where gender = "male"
) )
) as snippet
from imagedata
where timestamp is not NULL
order by random()
limit 10
I was expecting for each row of the SELECT to have different random replacement every time the subquery is invoked.
hello i'm %NAME% and this is my house
This is the car of %NAME%, let me know what you think
instead each row has the same kind of replacement:
hello i'm david and this is my house
This is the car of david, let me know what you think
and so on...
I'm not sure it can be done inside sqlite or if i have to do it in php over two different database queries.
Thanks in advance!
Seems that random() in the subquery is only evaluated once.
Try this:
select
i.id,
replace(i.snippet, '%NAME%', n.name) snippet
from (
select
id,
snippet,
abs(random()) % (select count(*) from names where gender = 'male') + 1 num
from imagedata
where timestamp is not NULL
order by random() limit 10
) i inner join (
select
n.name,
(select count(*) from names where name < n.name and gender = 'male') + 1 num
from names n
where gender = 'male'
) n on n.num = i.num
I am quite new to u-sql, trying to solve
str1=\global\europe\Moscow\12345\File1.txt
str2=\global.bee.com\europe\Moscow\12345\File1.txt
str3=\global\europe\amsterdam\54321\File1.Rvt
str4=\global.bee.com\europe\amsterdam\12345\File1.Rvt
case1:
how do i get just "\europe\Moscow\12345\File1.txt" from the strings variable str1 & str2, i want to just take ("\europe\Moscow\12345\File1.txt") from str1 and str2 then "Groupby(\global\europe\Moscow\12345)" and take the count of distinct files from the path (""\europe\Moscow\12345\")
so the output would be something like this:
distinct_filesby_Location_Date
to solve the above case i tried the below u-sql code but not quite sure whether i am writing the right script or not:
#inArray = SELECT new SQL.ARRAY<string>(
filepath.Contains("\\europe")) AS path
FROM #t;
#filesbyloc =
SELECT [ID],
path.Trim() AS path1
FROM #inArray
CROSS APPLY
EXPLODE(path1) AS r(location);
OUTPUT #filesbyloc
TO "/Outputs/distinctfilesbylocation.tsv"
USING Outputters.Tsv();
any help would you greatly appreciated.
One approach to this is to put all the strings you want to work with in a file, eg strings.txt and save it in your U-SQL input folder. Also have a file with the cities in you want to match, eg cities.txt. Then try the following U-SQL script:
#input =
EXTRACT filepath string
FROM "/input/strings.txt"
USING Extractors.Tsv();
// Give the strings a row-number
#input =
SELECT ROW_NUMBER() OVER() AS rn,
filepath
FROM #input;
// Get the cities
#cities =
EXTRACT city string
FROM "/input/cities.txt"
USING Extractors.Tsv();
// Ensure there is a lower-case version of city for matching / joining
#cities =
SELECT city,
city.ToLower() AS lowercase_city
FROM #cities;
// Explode the filepath into separate rows
#working =
SELECT rn,
new SQL.ARRAY<string>(filepath.Split('\\')) AS pathElement
FROM #input AS i;
// Explode the filepath string, also changing to lower case
#working =
SELECT rn,
x.pathElement.ToLower() AS pathElement
FROM #working AS i
CROSS APPLY
EXPLODE(pathElement) AS x(pathElement);
// Create the output query, joining on lower case city name, display, normal case name
#output =
SELECT c.city,
COUNT( * ) AS records
FROM #working AS w
INNER JOIN
#cities AS c
ON w.pathElement == c.lowercase_city
GROUP BY c.city;
// Output the result
OUTPUT #output TO "/output/output.txt"
USING Outputters.Tsv();
//OUTPUT #working TO "/output/output2.txt"
//USING Outputters.Tsv();
My results:
HTH
Taking the liberty to format your input file as TSV file, and not knowing all the column semantics, here is a way to write your query. Please note that I made the assumptions as provided in the comments.
#d =
EXTRACT path string,
user string,
num1 int,
num2 int,
start_date string,
end_date string,
flag string,
year int,
s string,
another_date string
FROM #"\users\temp\citypaths.txt"
USING Extractors.Tsv(encoding: Encoding.Unicode);
// I assume that you have only one DateTime format culture in your file.
// If it becomes dependent on the region or city as expressed in the path, you need to add a lookup.
#d =
SELECT new SqlArray<string>(path.Split('\\')) AS steps,
DateTime.Parse(end_date, new CultureInfo("fr-FR", false)).Date.ToString("yyyy-MM-dd") AS end_date
FROM #d;
// This assumes your paths have a fixed formatting/mapping into the city
#d =
SELECT steps[4].ToLowerInvariant() AS city,
end_date
FROM #d;
#res =
SELECT city,
end_date,
COUNT( * ) AS count
FROM #d
GROUP BY city,
end_date;
OUTPUT #res
TO "/output/result.csv"
USING Outputters.Csv();
// Now let's pivot the date and count.
OUTPUT #res2
TO "/output/res2.csv"
USING Outputters.Csv();
#res2 =
SELECT city, MAP_AGG(end_date, count) AS date_count
FROM #res
GROUP BY city;
// This assumes you know exactly with dates you are looking for. Otherwise keep it in the first file representation.
#res2 =
SELECT city,
date_count["2016-11-21"]AS [2016-11-21],
date_count["2016-11-22"]AS [2016-11-22]
FROM #res2;
UPDATE AFTER RECEIVING SOME EXAMPLE DATA IN PRIVATE EMAIL:
Based on the data you sent me (after the extraction and counting of the cities that you either could do with the join as outlined in Bob's answer where you need to know your cities in advance, or with the taking the string from the city location in the path as in my example, where you do not need to know the cities in advance), you want to pivot the rowset city, count, date into the rowset date, city1, city2, ... were each row contains the date and the counts for each city.
You could easily adjust my example above by changing the calculations of #res2 in the following way:
// Now let's pivot the city and count.
#res2 = SELECT end_date, MAP_AGG(city, count) AS city_count
FROM #res
GROUP BY end_date;
// This assumes you know exactly with cities you are looking for. Otherwise keep it in the first file representation or use a script generation (see below).
#res2 =
SELECT end_date,
city_count["istanbul"]AS istanbul,
city_count["midlands"]AS midlands,
city_count["belfast"] AS belfast,
city_count["acoustics"] AS acoustics,
city_count["amsterdam"] AS amsterdam
FROM #res2;
Note that as in my example, you will need to enumerate all cities in the pivot statement by looking it up in the SQL.MAP column. If that is not known apriori, you will have to first submit a script that creates the script for you. For example, assuming your city, count, date rowset is in a file (or you could just duplicate the statements to generate the rowset in the generation script and the generated script), you could write it as the following script. Then take the result and submit it as the actual processing script.
// Get the rowset (could also be the actual calculation from the original file
#in = EXTRACT city string, count int?, date string
FROM "/users/temp/Revit_Last2Months_Results.tsv"
USING Extractors.Tsv();
// Generate the statements for the preparation of the data before the pivot
#stmts = SELECT * FROM (VALUES
( "#s1", "EXTRACT city string, count int?, date string FROM \"/users/temp/Revit_Last2Months_Results.tsv\" USING Extractors.Tsv();"),
( "#s2", "SELECT date, MAP_AGG(city, count) AS city_count FROM #s1 GROUP BY date;" )
) AS T( stmt_name, stmt);
// Now generate the statement doing the pivot
#cities = SELECT DISTINCT city FROM #in2;
#pivots =
SELECT "#s3" AS stmt_name, "SELECT date, "+String.Join(", ", ARRAY_AGG("city_count[\""+city+"\"] AS ["+city+"]"))+ " FROM #s2;" AS stmt
FROM #cities;
// Now generate the OUTPUT statement after the pivot. Note that the OUTPUT does not have a statement name.
#output =
SELECT "OUTPUT #s3 TO \"/output/pivot_gen.tsv\" USING Outputters.Tsv();" AS stmt
FROM (VALUES(1)) AS T(x);
// Now put the statements into one rowset. Note that null are ordering high in U-SQL
#result =
SELECT stmt_name, "=" AS assign, stmt FROM #stmts
UNION ALL SELECT stmt_name, "=" AS assign, stmt FROM #pivots
UNION ALL SELECT (string) null AS stmt_name, (string) null AS assign, stmt FROM #output;
// Now output the statements in order of the stmt_name
OUTPUT #result
TO "/pivot.usql"
ORDER BY stmt_name
USING Outputters.Text(delimiter:' ', quoting:false);
Now download the file and submit it.
I have two tables: TblAppointmentTypes and TblEmployeeInfo. There is many to many relation between these two tables with a joined table that is TblEmployeeServices. There are two records in TblAppointmentTypes and four records in TblEmployeeInfo. All the two records of TblAppointmentTypes is assigned to all of the records in TblEmployeeInfo, that there is eight records in TblEmployeeServices. I want to retrive all the services that are assigned to all the four Employees, it should return 2 that is assigned to all the four employees, but my query return 8 records, four duplicate services.
I am using Telerik Open Access ORM. Here is the code:
public static List<TblAppointmentType> GetAllAppointmentType(List<int> employeeIDs)
{
var list = new List<TblAppointmentType>();
if (employeeIDs != null && employeeIDs.Count > 0)
{
var dc = new Entities();
list = (from a in dc.TblAppointmentTypes.Distinct()
join e in dc.TblEmployeeServices on a.ID equals e.AppointmentTypeID
where a.IsDeleted == false && employeeIDs.Contains<int>(e.EmployeeID)
select a).ToList();
}
return list;
}
As I figured it out, You want to get all AppointmentTypes which are related to all Employees.
It means that AppTypes that are related to 3 Employees (in your case) should be excluded.
So, the most efficient code that I have tried is like this :
list = (from a in dc.TblAppointmentTypes
join e in dc.TblEmployeeServices on a.ID equals e.AppointmentTypeID
where a.IsDeleted == false
group e.EmployeeID by a into g
where g.count() == employeeIDs.Count()
select g.Key).ToList();
How can I get a single row result (e.g. in form of a table/array) back from a sql statement. Using Lua Sqlite (LuaSQLite3). For example this one:
SELECT * FROM sqlite_master WHERE name ='myTable';
So far I note:
using "nrows"/"rows" it gives an iterator back
using "exec" it doesn't seem to give a result back(?)
Specific questions are then:
Q1 - How to get a single row (say first row) result back?
Q2 - How to get row count? (e.g. num_rows_returned = db:XXXX(sql))
In order to get a single row use the db:first_row method. Like so.
row = db:first_row("SELECT `id` FROM `table`")
print(row.id)
In order to get the row count use the SQL COUNT statement. Like so.
row = db:first_row("SELECT COUNT(`id`) AS count FROM `table`")
print(row.count)
EDIT: Ah, sorry for that. Here are some methods that should work.
You can also use db:nrows. Like so.
rows = db:nrows("SELECT `id` FROM `table`")
row = rows[1]
print(row.id)
We can also modify this to get the number of rows.
rows = db:nrows("SELECT COUNT(`id`) AS count FROM `table`")
row = rows[1]
print(row.count)
Here is a demo of getting the returned count:
> require "lsqlite3"
> db = sqlite3.open":memory:"
> db:exec "create table foo (x,y,z);"
> for x in db:urows "select count(*) from foo" do print(x) end
0
> db:exec "insert into foo values (10,11,12);"
> for x in db:urows "select count(*) from foo" do print(x) end
1
>
Just loop over the iterator you get back from the rows or whichever function you use. Except you put a break at the end, so you only iterate once.
Getting the count is all about using SQL. You compute it with the SELECT statement:
SELECT count(*) FROM ...
This will return one row containing a single value: the number of rows in the query.
This is similar to what I'm using in my project and works well for me.
local query = "SELECT content FROM playerData WHERE name = 'myTable' LIMIT 1"
local queryResultTable = {}
local queryFunction = function(userData, numberOfColumns, columnValues, columnTitles)
for i = 1, numberOfColumns do
queryResultTable[columnTitles[i]] = columnValues[i]
end
end
db:exec(query, queryFunction)
for k,v in pairs(queryResultTable) do
print(k,v)
end
You can even concatenate values into the query to place inside a generic method/function.
local query = "SELECT * FROM ZQuestionTable WHERE ConceptNumber = "..conceptNumber.." AND QuestionNumber = "..questionNumber.." LIMIT 1"
Okay guys. I'm a noob. I know (some) programming, a little SQL, and scant LINQ to SQL.
GOAL: Bind nested ListViews to LINQ generated iQueryable of anonymous type. I want to use LINQ because you can use GroupBy and bind the nested ListView to the 'it' keyword.
SETUP: I have groups of sets of conditions. Each set of conditions is stored in the BillingCodes table. Each group of BillingCodes is stored in the BillingGroups table.
I have a custom object that stores the ID, Name, and NumCodes for each BillingGroup that the user has chosen.
I have a collection of these objects called GroupsList that has a list of the groups that the user has chosen.
Problem 1: I can iterate through GroupsList and grab all the IDs. How do I translate the SQL 'WHERE ID IN(a string of comma delineated IDs)' for LINQ to SQL? Is that the best way to do that?
Problem 2: Once I have the list of BillingGroups I need to iterate through each group. For each group, I need to iterate through the BillingCodes. For each BillingCode I need to generate a WHERE clause that has all of the conditions in the BillingCode. I propose something like so:
for each BillingGroup in BillingGroups
for each BillingCode in BillingGroup.BillingCodes
where1 = "..."
next
next
Problem 3: Here's the part where I don't have a clue. I need to dynamically create a query in LINQ to SQL. Keep in mind that I don't know how many groups there'll be or how many codes are in each group.
There are 2 tables:
**transactions**
transaction_id
patient_id
svc_date
code
charge
description
**v_patients**
first_name
last_name
patient_id
date_of_birth
insname
active
provider_name
I imagine a query that looks something like this:
[Group1] Select MAX(svc_date), patient_id, transaction_id
From (
Select transaction_id, patient_id, svc_date
From transactions join v_patients on patient_id
[Code1] Where code=”” and description contains “” and insurance contains “” and charge >= PriceFloor and charge <= PriceCeiling
UNION
Select transaction_id, patient_id, svc_date
From transactions join v_patients on patient_id
[Code2]Where code=”” and description contains “” and insurance contains “” and charge >= PriceFloor and charge <= PriceCeiling
)
Group By patient_id
UNION
[Group2] Select MAX(svc_date), patient_id, transaction_id
From (
Select transaction_id, patient_id, svc_date
From transactions join v_patients on patient_id
[Code1]Where code=”” and description contains “” and insurance contains “” and charge >= PriceFloor and charge <= PriceCeiling
UNION
Select transaction_id, patient_id, svc_date
From transactions join v_patients on patient_id
[Code2]Where code=”” and description contains “” and insurance contains “” and charge >= PriceFloor and charge <= PriceCeiling
)
Group By patient_id
Problem 4: Lastly, I want to wrap that query in one that groups by patient_id. Something that end in Select as New With {key, it as transactions, num as count()}
I have pieced together this knowledge with endless reading and searches. I'll continue to look for answers, but any help would be GREATLY appreciated.
Thanks.
EDIT - ANSWER:
Here's the code that ended up working for me:
Dim chosenIDs() As Short = (From p In GroupsList _
Select p.ID).ToArray()
GroupMatchListView.DataSource = Nothing
If chosenIDs.Length > 0 Then
Dim db As New AudioRxInternalDataContext
Dim vf As New VersaformDataContext
Dim chosenGroups() As BillingGroup = (db.BillingGroups.Where(Function(m) chosenIDs.Contains(m.ID))).ToArray()
Dim wholeResults As List(Of transaction) = Nothing
For Each chosenGroup As BillingGroup In chosenGroups
Dim groupResults As List(Of transaction) = Nothing
For Each chosenCode As BillingCode In chosenGroup.BillingCodes
Dim codePredicate = PredicateBuilder.True(Of transaction)()
codePredicate = codePredicate.And(Function(i) i.code.Equals(chosenCode.Code))
If Not chosenCode.Description Is Nothing Then codePredicate = codePredicate.And(Function(i) i.description.ToUpper().Contains(chosenCode.Description.ToUpper()))
If Not chosenCode.Insurance Is Nothing Then codePredicate = codePredicate.And(Function(i) i.v_patient.insname.ToUpper().Contains(chosenCode.Insurance.ToUpper()))
If Not chosenCode.PriceFloor Is Nothing Then codePredicate = codePredicate.And(Function(i) i.charge >= chosenCode.PriceFloor)
If Not chosenCode.PriceCeiling Is Nothing Then codePredicate = codePredicate.And(Function(i) i.charge <= chosenCode.PriceCeiling)
If groupResults Is Nothing Then
groupResults = vf.transactions.Where(codePredicate).ToList()
Else
groupResults.AddRange(vf.transactions.Where(codePredicate).ToList())
End If
Next
groupResults = groupResults.GroupBy(Function(r) r.patient_id).SelectMany(Function(g) g.Where(Function(r) r.svc_date = g.Max(Function(a) a.svc_date))).ToList()
If wholeResults Is Nothing Then
wholeResults = groupResults
Else
wholeResults.AddRange(groupResults)
End If
Next
Dim conditionsPredicate = PredicateBuilder.True(Of transaction)()
conditionsPredicate = conditionsPredicate.And(Function(i) i.v_patient.active = "Y")
conditionsPredicate = conditionsPredicate.And(Function(i) i.svc_date >= StartDateBox.Text)
conditionsPredicate = conditionsPredicate.And(Function(i) i.svc_date <= EndDateBox.Text)
If Not OfficeDropDownList.SelectedValue = "Both" Then conditionsPredicate = conditionsPredicate.And( _
Function(i) (If(i.v_patient.provider_name, "").ToUpper().Contains(OfficeDropDownList.SelectedValue.ToUpper())))
wholeResults = wholeResults.Where(conditionsPredicate.Compile()).ToList()
Dim goliath = From f In wholeResults _
Group f By f.v_patient Into Group _
Order By v_patient.last_name, v_patient.first_name, v_patient.date_of_birth _
Select New With {.PatientID = v_patient.patient_id, .LastName = v_patient.last_name, .FirstName = v_patient.first_name, _
.DOB = v_patient.date_of_birth, .Ins = v_patient.insname, .MatchCount = Group.Count(), .Matches = Group}
GroupMatchListView.DataSource = goliath
theMatchesLabel.Text = goliath.Count()
Else
theMatchesLabel.Text = "0"
End If
Don't ask me why I used goliath for the final variable. I created that bit of code late at night, and the previous attempt had been named david.
Thanks for everyone's suggestions!
EDIT : Shame on me : I didn't use VB, but c#. But I hope some answers should help a bit...
Problem 1 : grab a list or array of int (or string) named Ids, for example and use
.Where(m => Ids.Contains(m.Id)
If the list of Ids comes from Database, I think you have to make 2 queries...
Problem 2 : not really clear with the infos you give, but the use of
SelectMany(x => blabla)
somewhere should do the trick (but once again hard to say like so)
Problem 3 : here also not really clear : what's the interest of you union in same groups ? If the difference are only codes, why not use the system of Problem 1 ?
To build "dynamic queries", I can just say that IQueryable can be build "on demand", like classic code, for example
var query = blabla;
if (searchCriterion.Name != null)
query = query.Where(m => m.Name == searchCriterion.Name);
Problem 4 : I use a "ToDictionary()" extension, as you seem to need a KeyValuePair, but they are of course other ways.
GroupBy(m => m.TransactionId).ToDictionary(m => m.Key, m => m.Count)
But... if you could be a little bit more concrete, maybe ;)
Edit Problem 4 :
didn't read well, rather something like that
GroupBy(m => m.TransactionId).Select(g => new {
patientId = g.Key,
transaction = g.SelectMany(p => p.Transactions),
num = g.Count());