I have two columns i need to show all the records in column [PR] and some columns from column [EM]. The below SQL statement does not return all the records from column [PR].
SELECT
[PR].[WBS1], [EM].[FirstName], [EM].[LastName], [EM].[EMail]
FROM
[VisionDemo].[dbo].[PR]
JOIN
[VisionDemo].[dbo].[EM] ON [VisionDemo].[dbo].[PR].[Principal] = [VisionDemo].[dbo].[EM].[Employee]
How do I do this ?
Use a LEFT JOIN:
SELECT [PR].[WBS1],[EM].[FirstName],[EM].[LastName], [EM].[EMail]
FROM [VisionDemo].[dbo].[PR]
LEFT JOIN [VisionDemo].[dbo].[EM]
ON [VisionDemo].[dbo].[PR].[Principal] = [VisionDemo].[dbo].[EM].[Employee]
Use LEFT JOIN. This is fundamental stuff, go check out the FAQ
SELECT [PR].[WBS1],[EM].[FirstName],[EM].[LastName], [EM].[EMail]
FROM [VisionDemo].[dbo].[PR]
LEFT JOIN [VisionDemo].[dbo].[EM] --Use a left join
ON [VisionDemo].[dbo].[PR].[Principal] = [VisionDemo].[dbo].[EM].[Employee]
Related
I am trying to join two tables from a database; energyImport and sunAlt.
energyImport has three columns: timestamp_id, energy, duration.
sunAlt has two columns: timestamp_id, altitude
I am doing an inner join on these two tables using the SQL:
SELECT *
FROM energyImport
INNER JOIN sunAz ON sunAz.timestamp_id = energyImport.timestamp_id;
The output from this is:
timestamp_id,duration,energy,timestamp_id,altitude
1601769600,1800,81310,1601769600,0.0
1601771400,1800,78915,1601771400,0.0
1601773200,1800,78305,1601773200,0.0
The problem is that the timestamp_id column is repeated. How can I join these columns and only include the first timestamp_id?
Replace the * with
energyImport.timestamp_id,energyImport.duration, energyImport.energy,
sunAz.altitude
Either you specify the columns that you want in the results:
SELECT e.timestamp_id, e.duration, e.energy, s.altitude
FROM energyImport e INNER JOIN sunAz s
ON s.timestamp_id = e.timestamp_id;
Or, use NATURAL instead of INNER join, so that the join is based on the columns(s) with the same names of the 2 tables (if this fits your requirement), because NATURAL join returns only 1 of each pair of these columns:
SELECT *
FROM energyImport NATURAL JOIN sunAz;
See the demo.
I wrote this
SELECT BrojRacuna
FROM Racun LEFT OUTER JOIN Stavka
ON IDRacun=RacunID,
SELECT UkupnaCijena
AS 'Ukupna cijena' FROM Stavka;
BrojRacuna means bill number, Racun means bill and UkupnaCijena means price total. Basically I want to add column which outputs price total and is called Ukupna cijena in the same query as the first SELECT LEFT OUTER JOIN. What is the way to do this?
Thanks in advance
Some guessing:
SELECT BrojRacuna, UkupnaCijena AS Ukupna_cijena
FROM Racun
LEFT OUTER JOIN Stavka
ON IDRacun=RacunID
You should add aliases to your tables and qualify the columns with that:
SELECT r.BrojRacuna, s.UkupnaCijena AS Ukupna_cijena
FROM Racun AS r
LEFT OUTER JOIN Stavka as s
ON r.IDRacun=s.RacunID
It makes it a whole lot easier to understand the query for the next person
just do
select
Racun.BrojRacuna,
Stavka.UkupnaCijena AS 'Ukupna cijena'
FROM Racun inner join Stavka
ON racun.RacunID= stavka.RacunID
in order to do the join right you need to join a a certain and similar column to both tables. like I did on RacounID (I dont know if both your tables have that column)
i have three table to join in select query .. this query not working
select policy_master.POLICY_REFER ,policy_master.CLIENT_NAME ,policy_master.ADRESS ,policy_master.POLICY_CLASS ,policy_master.POLICY_PRODUCT ,policy_master.EXECUTIVE_NAME ,policy_master.COMM_DATE ,
policy_master.EXPIRY_DATE ,policy_master.RENEWAL_DATE ,policy_master.GROSS ,policy_master.FED ,policy_master.FIF ,policy_master.STAMP_DUTY ,policy_master.PERMIUM ,policy_master.DESCRIPTION,
POLICY_INSURER_DETAIL.INSURER_NAME,POLICY_INSURER_DETAIL.POLICY_NUMBER,POLICY_INSURER_DETAIL.P_SHARE,POLICY_INSURER_DETAIL.G_PREMIUM,POLICY_INSURER_DETAIL.BROKER_P,POLICY_INSURER_DETAIL.LEVY,
POLICY_INSURER_DETAIL.LEVY,POLICY_SUBAGENT_DETAIL.SUBAGENT_NAME,POLICY_SUBAGENT_DETAIL.BUSSINES_SHARE,POLICY_SUBAGENT_DETAIL.COMM_P,POLICY_SUBAGENT_DETAIL.COMM_VALUE
from POLICY_MASTER INNER JOIN POLICY_INSURER_DETAIL
on policy_master.policy_refer = POLICY_INSURER_DETAIL.POLICY_REFER and
policy_master.policy_refer = POLICY_SUBAGENT_DETAIL.POLICY_REFER;
Please tell me what i should do
To simplify the answer I've removed all explicit columns and replaced them with select *.
You have only joined two tables. You are refering to policy_subagent_detail table inside a join to policy_insurer_detail (but you're not joining the subagent details table). You should join this table and specify joining conditions in order to be able to retrieve columns from it (as you did in your column list near select keyword).
I've also added table aliases to make your code shorter.
select *
from POLICY_MASTER pm
inner join POLICY_INSURER_DETAIL pid on
pm.policy_refer = pid.POLICY_REFER
inner join POLICY_SUBAGENT_DETAIL psd on -- added join
pm.policy_refer = psd.POLICY_REFER
do inner join of the third table required you missed iton the from clause . thats it .OR you can use where clause like
from table1 a,table2 b,table3 c
where a.colname= b.colname and
b.colname=c.colname.
I have this query:
SELECT
EnrollmentID, MarketID
FROM
Contracts AS CO
LEFT JOIN
Customers AS C ON C.EnrollmentID = CO.BatchID AND MarketID = 'AB'
WHERE
C.EnrollmentID IS NULL
Here, I have a question that in this query is it possible that the query will verify data for MarketID = 'AB' in left join because as per WHERE condition?
I am getting result of EnrollmentIDs and MarketIDs are all NULL.
Note: The LEFT JOIN keyword returns all the rows from the left table (Contracts ), even if there are no matches in the right table (Customers ).
Now, if you want to select right table column and there are no matching data in the right table ,like.
SELECT CO.EnrollmentID, CO.MarketID ,C.Some_col
FROM Contracts AS CO
LEFT JOIN Customers AS C ON C.EnrollmentID = CO.BatchID
so, C.Some_col column will get all the null value for no matching rows in the right table.i think this is the reason why you are getting the null value for
MarketIDs and EnrollmentIDs.
hope, this help you.
I have the following query:
SELECT MS.idReg, MS.dsMotivo, A.contrato FROM MS
INNER JOIN S
ON S.motivoSiniestro = MS.idReg
INNER JOIN C
ON C.n__contrat = S.n__contrat
INNER JOIN A
ON A.n__article = C.n__article
Table MS has only 12 records, the ones I need and others have many more entries.
My problem is that I only want the 12 records from MS and their contrato column but I'm getting much more that that. Have tried many combinations of INNER, OUTER, LEFT and RIGHT joins. Any help?
You get too many records because there are several A.contrato values for each row in the MS table. Sql server does not know which one of all the A.contrato values to take so it returns all of them. First you need to decide which one you want.
If any will do you can simply write your query like this:
SELECT MS.idReg, MS.dsMotivo, MAX(A.contrato)
FROM MS
INNER JOIN S
ON S.motivoSiniestro = MS.idReg
INNER JOIN C
ON C.n__contrat = S.n__contrat
INNER JOIN A
ON A.n__article = C.n__article
GROUP BY MS.idReg, MS.dsMotivo
Try this one -
SELECT MS.idReg, MS.dsMotivo, A.contrato
FROM dbo.MS
OUTER APPLY (
SELECT TOP 1 A.contrato
FROM dbo.S
JOIN dbo.C ON C.n__contrat = S.n__contrat
JOIN dbo.A ON A.n__article = C.n__article
WHERE S.motivoSiniestro = MS.idReg
) s