I'm coming to the end of setting up my first Python script which involves querying my SQL Server (which I've removed credentials for privacy reasons).
This is a excerpt of the code for which I can successfully login and query my SQL Server db.
I know my 2 SELECT queries work independently as I've tested already. But I've come unstuck setting the first SELECT query as a variable which I wish to pass into the 2nd Select queries where clause.
In SQL terms, I wish to set the adjusted date as the variable StartDate (from my first SELECT) and pass this to the Where statement in my 2nd SELECT statement. I think I'm failing on setting the variable properly. To reconfirm, I've verified the SELECT statements work from Python.
Is there something I need to add? Any suggestions appreciated.
import csv
import os
import urllib.request
import pymssql
conn = pymssql.connect(server='', user='', password='', database='')
StartDate = conn.cursor()
StartDate.execute('SELECT Dateadd(dd, -19, MAX(LastDateValue)) FROM tbl_Date')
ASXCodes = conn.cursor()
ASXCodes.execute('SELECT ASXCode FROM tbl_Company WHERE (ASX200 = 1 OR
MarketIndex =1 OR SegmentIndex = 1) AND Delisted = 0 AND LastTraded
>= StartDate ORDER BY ASXCode')
Just guessing - couldn't you do everything in one single query?
SELECT ASXCode FROM tbl_Company WHERE (ASX200 = 1 OR MarketIndex =1 OR SegmentIndex = 1) AND Delisted = 0 AND LastTraded >= (SELECT Dateadd(dd, -19, MAX(LastDateValue)) FROM tbl_Date) ORDER BY ASXCode
Also, I would imagine that tbl_Date.LastDateValue is indexed? If you get many records, that could be rather expensive...
Related
I have this query:
WITH InfoNeg AS
(
SELECT DISTINCT
n.idcliente,
CASE
WHEN DATEDIFF(MONTH, MAX(n.fechanegociacion), GETDATE()) <= 2
THEN 'Negociado 6 meses'
ELSE NULL
END AS TipoNeg
FROM
SAB2NewExports.dbo.negociaciones AS n
WHERE
Aprobacion = 'Si'
AND cerrado = 'Si'
GROUP BY
n.idcliente
), Multi AS
(
SELECT DISTINCT
idcliente, COUNT(distinct idportafolio) AS NumPorts
FROM
orangerefi.wfm.wf_master_HIST
WHERE
YEAR(Fecha_BKP) = 2021
AND MONTH(Fecha_BKP) = 08
GROUP BY
idcliente
)
SELECT DISTINCT
m.IdCliente, c.Nombre1
FROM
orangerefi.wfm.wf_master_HIST as m
LEFT JOIN
InfoNeg ON m.idcliente = InfoNeg.idcliente
LEFT JOIN
Multi ON m.IdCliente = Multi.idcliente
LEFT JOIN
SAB2NewExports.dbo.Clientes AS c ON m.IdCliente = c.IdCliente
WHERE
CanalTrabajo = 'Callcenter - Outbound' -- Cambiar aca
AND YEAR (Fecha_BKP) = 2021
AND MONTH(Fecha_BKP) = 08
AND GrupoTrabajo IN ('Alto') -- Cambiar aca
AND Bucket IN (1, 2) -- Cambiar aca
AND Multi.NumPorts > 1
AND Infoneg.TipoNeg IS NULL
When I run it, I get 30 thousand rows and the columns that I get when performing the query are: ClientID, name. I would like it to be saved in an Excel file when I run it, I don't know if it's possible.
Another question, is it possible to create a variable that stores text?
I used CONCAT(), but the text being so long is a bit cumbersome, I don't know if there is any alternative.
If you can help me, I appreciate it.
To declare a variable
DECLARE #string VARCHAR(MAX)
SET #string = concat()
then insert whatever you are concatenating
Here is an answer given by carusyte
Export SQL query data to Excel
I don't know if this is what you're looking for, but you can export the results to Excel like this:
In the results pane, click the top-left cell to highlight all the records, and then right-click the top-left cell and click "Save Results As". One of the export options is CSV.
You might give this a shot too:
INSERT INTO OPENROWSET
('Microsoft.Jet.OLEDB.4.0',
'Excel 8.0;Database=c:\Test.xls;','SELECT productid, price FROM dbo.product')
Lastly, you can look into using SSIS (replaced DTS) for data exports. Here is a link to a tutorial:
http://www.accelebrate.com/sql_training/ssis_2008_tutorial.htm
== Update #1 ==
To save the result as CSV file with column headers, one can follow the steps shown below:
Go to Tools->Options
Query Results->SQL Server->Results to Grid
Check “Include column headers when copying or saving results”
Click OK.
Note that the new settings won’t affect any existing Query tabs — you’ll need to open new ones and/or restart SSMS.
I have a select statement That I need to turn into an Update.
I need to update a particular unix time field to January 1, 2016.
I have to select the records using a compound select statement.
Update archive_queue set archive_time = 1451606400
FROM
select recordings.(star), archive_queue.(star)
from
recordings, archive_queue
where
recordings.device_alias = '70285' and recordings.keepdays = 120
and recordings.ident = archive_queue.rec_ident
The above gives me a syntax error. The select gives me the records that I need to update. I looked at some examples here, but can't figure out the proper syntax based on my needs. Thanks everyone !
You should remove the select and only have one FROM statement:
Update archive_queue set archive_time = 1451606400
from recordings, archive_queue
where recordings.device_alias = '70285' and recordings.keepdays = 120
and recordings.ident = archive_queue.rec_ident
I've got a package in SSIS 2012 that has an Execute SQL task in the control flow level.
The SQL in question does an Upsert via the SQL merge statement. What I want to do, is return the count of records inserted and records updated (No deletes going on here to worry about). I'm using the output option to output the changed recs to a table variable.
I've tried returning the values as:
Select Count(*) as UpdateCount from #mergeOutput where Action = 'Update'
and
Select Count(*) as InsertCount from #mergeOutput where Action = 'Insert'
I've tried setting the resultset to both Single rowset and Full rowset, but i'm not seeing anything returned to the package variables I've set for them (intInsertcount and intUpdatecount).
What am I doing wrong?
Thanks.
You should try the following:
Select UpdateCount = (Select Count(*) as UpdateCount from #mergeOutput where Action = 'Update'),
InsertCount = (Select Count(*) as InsertCount from #mergeOutput where Action = 'Insert')
Using a single result set this should give you an output along the lines of
UpdateCount | InsertCount
# | #
Then just map the result set changing the name of each result and use breakpoints to test and makesure the variables update through the process.
This is what I use when I want to return multiple result sets from different tables in the same query, however I don't know how it works with the output of merge statements.
Set the Execute SQL command output as single line
SqlCommand as :
Select sum(case when Action='Update' then 1 else 0 end) Update_count,
sum(case when Action='Insert' then 1 else 0 end) Insert_count
from #mergeOutput;
In the Result set tab click on the Add button; set your variables to point to the 2 outputs of the above query, positionally:
0 => intUpdatecount; 1 => intInsertcount
I want to update on a linked server the result of a query as well from a linked server.
The first sql snippet gives me the value to be updated:
SELECT mmdb_vessel.IMONo, mmdb_vessel.DeathDate
From OPENQUERY(MMDB, 'SELECT FunctionalLocation, IMONo, VesselStatus, CONVERT(VARCHAR(10), DeathDate, 102) AS DeathDate
FROM VESSEL
WHERE VESSEL.VesselStatusID <> 42 AND VESSEL.DeathDate is not null') as mmdb_vessel
, eb_all_v
WHERE
eb_all_v.IMO_No = mmdb_vessel.IMONo
AND eb_all_v.status = 'in service'
the second is actually what I'm not able to implement, it should show what I want to achieve:
UPDATE EPI2..EPI.PLANT
SET KIND_OF_LIQUIDATION_NO = 1
, LIQUIDATION_DATE = [result from snippet above].DeathDate
Where EPI2..EPI.PLANT.IMONo = [result from snippet above].IMONo
I'm not so sure if my explanation is sufficient, please feel free to ask for additional information!
Thanks, already in advance,
Werner
I would recommend to select the data from the remote server first and store the required data e.g. in a temptable, because LinkedServer and updates can have some sideeffects (e.g. performing a tablescan on the remote table, altough you would not expect it if an updaet is involved, etc) - but this depends on your exact usage/scenario.
Select data you need to update
SELECT * INTO #tmpTable FROM LINKEDSERVER.EPI.dbo.PLANT WHERE ....
Perform the update on local server
UPDATE EPI2..EPI.PLANT SET KIND_OF_LIQUIDATION_NO = 1, LIQUIDATION_DATE = t.DeathDate FROM #tmpTable t INNER JOIN EPI2..EPI.PLANT p on t.IMONo = p.IMONo
I have this sql:
UPDATE JOBMAKE SET WIP_STATUS='10sched1'
WHERE JBT_TYPE IN (SELECT JBT_TYPE FROM JOBVISIT WHERE JVST_ID = 21)
AND JOB_NUMBER IN (SELECT JOB_NUMBER FROM JOBVISIT WHERE JVST_ID = 21)
It works until I turn it into a parameterised query:
UPDATE JOBMAKE SET WIP_STATUS='10sched1'
WHERE JBT_TYPE IN (SELECT JBT_TYPE FROM JOBVISIT WHERE JVST_ID = #jvst_id)
AND JOB_NUMBER IN (SELECT JOB_NUMBER FROM JOBVISIT WHERE JVST_ID = #jvst_id)
Duplicated parameter names are not allowed. [ Parameter name = #jvst_id ]
I tried this (which i think would work in SQL SERVER 2005 - although I haven't tried it):
UPDATE JOBMAKE
SET WIP_STATUS='10sched1'
FROM JOBMAKE JM,JOBVISIT JV
WHERE JM.JOB_NUMBER = JV.JOB_NUMBER
AND JM.JBT_TYPE = JV.JBT_TYPE
AND JV.JVST_ID = 21
There was an error parsing the query. [ Token line number = 3,Token line offset = 1,Token in error = FROM ]
So, I can write dynamic sql instead of using parameters, or I can pass in 2 parameters with the same value, but does someone know how to do this a better way?
Colin
Your second attempt doesn't work because, based on the Books On-Line entry for UPDATE, SQL CE does't allow a FROM clause in an update statement.
I don't have SQL Compact Edition to test it on, but this might work:
UPDATE JOBMAKE
SET WIP_STATUS = '10sched1'
WHERE EXISTS (SELECT 1
FROM JOBVISIT AS JV
WHERE JV.JBT_TYPE = JOBMAKE.JBT_TYPE
AND JV.JOB_NUMBER = JOBMAKE.JOB_NUMBER
AND JV.JVST_ID = #jvst_id
)
It may be that you can alias JOBMAKE as JM to make the query slightly shorter.
EDIT
I'm not 100% sure of the limitations of SQL CE as they relate to the question raised in the comments (how to update a value in JOBMAKE using a value from JOBVISIT). Attempting to refer to the contents of the EXISTS clause in the outer query is unsupported in any SQL dialect I've come across, but there is another method you can try. This is untested but may work, since it looks like SQL CE supports correlated subqueries:
UPDATE JOBMAKE
SET WIP_STATUS = (SELECT JV.RES_CODE
FROM JOBVISIT AS JV
WHERE JV.JBT_TYPE = JOBMAKE.JBT_TYPE
AND JV.JOB_NUMBER = JOBMAKE.JOB_NUMBER
AND JV.JVST_ID = 20
)
There is a limitation, however. This query will fail if more than one row in JOBVISIT is retuned for each row in JOBMAKE.
If this doesn't work (or you cannot straightforwardly limit the inner query to a single row per outer row), it would be possible to carry out a row-by-row update using a cursor.