I have a GridView binded to LinqToSql-DataSource. The DataSource is Multiple-Join. I need unique Key-Values for the Grid. But all PrimaryKeys from the Tables could exist double or not because of left joins.
I have solved the problem in a pure sql-statement. There i create a ID for the TableRows by joining two PrimaryKeys an connecting with a "-". I need one of the IDs for later working with TableRows, the other could be null.
So I do in SQL-Statement:
select CAST(mitgliedschaft.id as varchar(MAX)) + '-' + CAST(ISNULL(funktion.id, '') as varchar(MAX)) as id from ...... inner join ...... etc
I need the CASTS for not producing Calculating with the "-" and the ISNULL-Function because the second ID could be Null.
Now I have to transfer this part of the scenario into Linq-Statement. I tried like this:
...
...
select new
{
...
id = mitgliedschaft.id.ToString() + "-" + (funktion.id == null ? 0 : funktion.id).ToString()
...
});
But didn't get it running in that way. Can someone help me concatenating an ID with "-" and an ID that can be NULL? If it is NULL it should be an empty String or Null-Digit or whatever.
got it now:
select new
{
id = (mitgliedschaft.id.ToString() + "-") + (funktion.id.ToString() ?? "0")
}
Related
I have a query like (simplified):
SELECT
JSON_QUERY(r.SerializedData, '$.Values') AS [Values]
FROM
<TABLE> r
WHERE ...
The result is like this:
{ "2019":120, "20191":120, "201902":121, "201903":134, "201904":513 }
How can I remove the entries with a key length less then 6.
Result:
{ "201902":121, "201903":134, "201904":513 }
One possible solution is to parse the JSON and generate it again using string manipulations for keys with desired length:
Table:
CREATE TABLE Data (SerializedData nvarchar(max))
INSERT INTO Data (SerializedData)
VALUES (N'{"Values": { "2019":120, "20191":120, "201902":121, "201903":134, "201904":513 }}')
Statement (for SQL Server 2017+):
UPDATE Data
SET SerializedData = JSON_MODIFY(
SerializedData,
'$.Values',
JSON_QUERY(
(
SELECT CONCAT('{', STRING_AGG(CONCAT('"', [key] ,'":', [value]), ','), '}')
FROM OPENJSON(SerializedData, '$.Values') j
WHERE LEN([key]) >= 6
)
)
)
SELECT JSON_QUERY(d.SerializedData, '$.Values') AS [Values]
FROM Data d
Result:
Values
{"201902":121,"201903":134,"201904":513}
Notes:
It's important to note, that JSON_MODIFY() in lax mode deletes the specified key if the new value is NULL and the path points to a JSON object. But, in this specific case (JSON object with variable key names), I prefer the above solution.
I am trying to combine data from different rows into one column, and this is working with just one minor problem.
declare #RitID int = 16
select ...,
( select distinct
ISNULL(LTRIM(RTRIM(r2.LotNr)), LTRIM(RTRIM(r.LotNr))) + '+' as 'data()'
from tblExtraBestemming eb2
inner join tblRit r2 on eb2.RitID = r2.RitID
where eb2.BestemmingID = eb.BestemmingID
and eb2.BestemmingTypeID = eb.BestemmingTypeID
and ( (eb.CombinedChildExtraBestemmingID is null and eb2.RitID = #RitID)
or
(eb.CombinedChildExtraBestemmingID is not null and eb2.RitID in (select r4.RitID from tblRit r4 where r4.MasterRitID = #RitID) )
)
for XML PATH('')
) as LotNr
from tblExtraBestemming eb
where ...
this returns the correct data for the column LotNr, like this
GTT18196
GTT18197
GTT18198+ GTT18199
Now my only problem is the space after the + sign in the third row from the result, how can I get rid of this ?
I expect this result
GTT18196
GTT18197
GTT18198+GTT18199
PS, actually there is also a + at the end of each row, but that is removed by the client. I thought I better mentions this already.
EDIT
I checked the data, there are no spaces at the end or the beginning of the data
EDIT
Query updated as suggested by #Larnu
EDIT
if I check the data in the table, this is the result
select '/' + r.LotNr + '/' from tblRit r where r.RitID in (50798, 50799)
COLUMN1
-------
/GTT18198/
/GTT18199/
So it appears to me there are no characters before or after the data
Just remove AS 'data()' from your query (it is not required in the above case).
And if trailing + is a problem, move it to the beginning and use STUFF function to chop off the first character from the result.
Using SSIS I am bringing in raw text files that contain this in the output:
I use this data later to report on. The Key columns get pivoted. However, I don't want to show all those columns individually, I only want to show the total.
To accomplish this my idea was calculate the Sum on insert using a trigger, and then insert the sum as a new row into the data.
The output would look something like:
Is what I'm trying to do possible? Is there a better way to do this dynamically on pivot? To be clear I'm not just pivoting these rows for a report, there are other ones that don't need the sum calculated.
Using derived column and Script Component
You can achieve this by following these steps:
Add a derived column (name: intValue) with the following expression:
(DT_I4)(RIGHT([Value],2) == "GB" ? SUBSTRING([Value],1,FINDSTRING( [Value], " ", 1)) : "0")
So if the value ends with GB then the number is taken else the result is 0.
After that add a script component, in the Input and Output Properties, click on the Output and set the SynchronousInput property to None
Add 2 Output Columns outKey , outValue
In the Script Editor write the following script (VB.NET)
Private SumValues As Integer = 0
Public Overrides Sub PostExecute()
MyBase.PostExecute()
Output0Buffer.AddRow()
Output0Buffer.outKey = ""
Output0Buffer.outValue = SumValues.ToString & " GB"
End Sub
Public Overrides Sub Input0_ProcessInputRow(ByVal Row As Input0Buffer)
Output0Buffer.AddRow()
Output0Buffer.outKey = Row.Key
Output0Buffer.outValue = Row.Value
SumValues += Row.intValue
End Sub
I am going to show you a way but I don't recommend adding total to the end of the detail data. If you are going to report on it show it as a total.
After source add a data transformation:
C#
Add two columns to your data flow: Size int and type string
Select Value as readonly
Here is the code:
string[] splits = Row.value.ToString().Split(' '); //Make sure single quote for char
int goodValue;
if(Int32.TryParse(splits[0], out goodValue))
{
Row.Size = goodValue;
Row.Type = "GB";
}
else
{
Row.Size = 0;
Row.Type="None";
}
Now you have the data with the proper data types to do arithmatic in your table.
If you really want the data in your format. Add a multicast and an aggregate and SUM(Size) and then merge back into your original flow.
I was able to solve my problem in another way using a trigger.
I used this code:
INSERT INTO [Table] (
[Filename]
, [Type]
, [DeviceSN]
, [Property]
, [Value]
)
SELECT ms.[Filename],
ms.[Type],
ms.[DeviceSN],
'Memory Device.Total' AS [Key],
CAST(SUM(CAST(left(ms.[Value], 2) as INT)) AS VARCHAR) + ' GB' as 'Value'
FROM [Table] ms
JOIN inserted i ON i.Row# = ms.Row#
WHERE ms.[Value] like '%GB'
GROUP BY ms.[filename],
ms.[type],
ms.[devicesn]
I need to convert this SQL Query to Link :
"Select * FROM [Register]
where RegisterId IN (SELECT MyId
FROM Friends
WHERE FriendId='" + Session["CurrentProfileId"] + "'
AND Status=1
UNION
SELECT FriendId
FROM Friends
WHERE MyId='" + Session["CurrentProfileId"] + "'
AND Status=1) ";
It may be look like this??? but this is incorrect and having errors
(from u in db.Register
where RegisterId).Contains
(from f in db.Freinds
where f.MyId == Id && m.Status == 1
select new { m.MyId })
.Union(from m in db.Freinds
where f.FreindId == Id && m.Status == 1
select new { m.CreateDate } ));
You have a few problems with the linq above and here are a few:
In the query in the Union you select the CreateDate whereas in the top on you select the MyId. I assume you meant to select FreindId.
In these 2 queries you create an anonymous class instance with the field but then compare it to the RegisterId which is probably a guid/string/int - but for sure not of the type you just created.
You are using the Contains method wrong. Linq syntax can be similar to sql but it is not the same. Check here for Contains
The correct Linq way of doing it is:
var idsCollection = ((from f in db.Freinds
where f.StatusId == 1 && f.MyId == Id
select f.MyId)
.Union(from m in db.Friends
where m.StatusId == 1 && f.FreindId == Id
select m.FriendId)).ToList();
var result = (from u in db.Register
where idsCollection.Contains(u.RegisterId)
select u).ToList();
Notice that the .ToList() is not a must and is here just to ease in debugging. For more information about this .ToList() and Linq in general check MSDN
I need to concatenate the following statement in SQL.
I am joining 2 tables, the MEDINFO table and the IMMUNIZE table.
There should be one record for each of the shot code dates as long as it is not null or 01/01/1901.
The output must look like this:
"Admin-" + medinfo_field_31 + ", Manuf-" + medinfo_field_32 + ", Lot-" + medinfo_field_33 + ", Exp-" + medinfo_field_34 + ", Site-" + medifno_field_35 + ", Dose-" + medinfo_field_36
Here is the criteria for the SQL statement I must create:
IF immunize_shot_code = 'FLU',
then concatenate medinfo_field_12 and medinfo_field_19 thru medinfo_field_24
IF immunize_shot_code = 'MENI',
then concatenate medinof_field_11 and medinfo_field_25 thru medinof_field_30
IF immunize_shot_code = 'TETA',
then concatenate medinfo_field_13 thru medinfo_field_18 and medinfo_field_31 thru medinfo_field_36"
Thanks for any ideas.
This would look something like the followning:
SELECT
(CASE WHEN Immunize_shot_code='Flu'
THEN medinfo_field_12+', '+med_info_field_19+ ', '+med_info_field_20+', '+med_info_field_21+ ', '+med_info_field_22+', '+med_info_field_23+', 'med_info_field_24
WHEN immunize_shot_code='MENI'
THEN [CONCATINATE AS PER ABOVE]
.....
.....
END) as ImmuCode
FROM TABLE_1
Like some of them mentioned above, you could use CASE statement something like this:
select
case when i.immunize_shot_Code = 'FLU'
then concat(m.medinfo_field_12,',',m.medinfo_field_19,',',m.medinfo_field_24...)
when i.immunize_Shot_Code = 'MENI'
then concat(m.medinfo_field_11,',',m.medinfo_field_11)
when i.immunize_Shot_code = 'TETA'
then concat(m.medinfo_field_13,',',m.medinfo_field18,',')
end as concat_value
from medinfo m
join immunize i on m.id = i.medinfo_id --change this to match your join
where (shot_code_date is not null or shot_code_date <> '01-01-1901');