I have the following sql query :
SELECT DATE(procedures.start) date, name, COUNT(procedure_types.id) count
FROM `procedure_types`
LEFT OUTER JOIN procedures on procedure_types.id = procedures.procedure_type_id
WHERE (DATE(procedures.start) = '2009-10-24')
GROUP BY DATE(procedures.start), procedure_types.id
ORDER BY DATE(procedures.start), procedure_types.id
There are two tables procedures & procedure_types.
Procedure has procedure_type_id which points to the procedure_types table.
The query is executing fine, but I want to list the procedure_types with count(0) even if they aren't being referenced by any procedures on that date.
I know it's something to do with the joins..can someone please help ?
Your WHERE clause is excluding procedure_types with no procedures. You need to move it to the JOIN:
SELECT DATE(procedures.start) date, name, COUNT(procedure_types.id) count
FROM `procedure_types`
LEFT OUTER JOIN procedures on procedure_types.id = procedures.procedure_type_id
AND DATE(procedures.start) = '2009-10-24'
GROUP BY DATE(procedures.start), procedure_types.id
ORDER BY DATE(procedures.start), procedure_types.id
Left Outer Join will select all records from Procedures table and only matching from Procedure_Types. You want to select all records from Procedure_Types even if no matching record in Procedures, so you need Right Outer Join. See this for more info on JOINS.
Related
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.
Currently not working...
SELECT COUNT(*) FROM CLICKHISTORY
INNER JOIN EDSC ON CLICKHISTORY.SOURCEID = EDSC.SOURCEID
WHERE EDSC.DOMAIN='SCMDomain';
Currently this returns Count = 0, and in words I want to merge two tables on the sourceID's and then filter out all data so we are only left with EDSC.DOMAIN= 'SCMDomain.
EDSC and CLICKHISTORY are the two tables. Thanks
Here is an alternative way of writing it without the JOIN:
SELECT COUNT(*)
FROM CLICKHISTORY
WHERE CLICKHISTORY.SOURCEID IN (
SELECT EDSC.SOURCEID
FROM EDSC
WHERE EDSC.DOMAIN = 'SCMDomain')
I have a SQL Query that joins 3 tables and pulls 3 total columns out of them. I was try to figure out how to Query that Query to get distinct records from only one of the columns. Here is what I have so far
Select Distinct Make.NAME
From
(
Select MakeModel.MAKE_ID, Make.NAME, Vehicle.MODEL_YR
From NagsInfo.dbo.Make
INNER JOIN NagsInfo.dbo.MakeModel
on Make.MAKE_ID = MakeModel.MAKE_ID
INNER JOIN NagsInfo.dbo.Vehicle
on MakeModel.MAKE_MODEL_ID = Vehicle.MAKE_MODEL_ID
Where Vehicle.MODEL_YR = #YEAR
)
I keep getting multiple different syntax errors, I believe the most recent one telling me that the parentheses were incorrect, but everywhere I looked they are required for Sub queries.
Why use a subquery at all? Why not just do:
SELECT DISTINCT M.NAME
FROM NagsInfo.dbo.Make M
JOIN NagsInfo.dbo.MakeModel MM ON M.MAKE_ID = MM.MAKE_ID
JOIN NagsInfo.dbo.Vehicle V ON MM.MAKE_MODEL_ID = V.MAKE_MODEL_ID
WHERE V.MODEL_YR = #YEAR
Why, in this query, is the final 'WHERE' clause needed to limit duplicates?
The first LEFT JOIN is linking programs to entities on a UID
The first INNER JOIN is linking programs to a subquery that gets statistics for those programs, by linking on a UID
The subquery (that gets the StatsForDistributorClubs subset) is doing a grouping on UID columns
So, I would've thought that this would all be joining unique records anyway so we shouldn't get row duplicates
So why the need to limit based on the final WHERE by ensuring the 'program' is linked to the 'entity'?
(irrelevant parts of query omitted for clarity)
SELECT LmiEntity.[DisplayName]
,StatsForDistributorClubs.*
FROM [Program]
LEFT JOIN
LMIEntityProgram
ON LMIEntityProgram.ProgramUid = Program.ProgramUid
INNER JOIN
(
SELECT e.LmiEntityUid,
sp.ProgramUid,
SUM(attendeecount) [Total attendance],
FROM LMIEntity e,
Timetable t,
TimetableOccurrence [to],
ScheduledProgramOccurrence spo,
ScheduledProgram sp
WHERE
t.LicenseeUid = e.lmientityUid
AND [to].TimetableOccurrenceUid = spo.TimetableOccurrenceUid
AND sp.ScheduledProgramUid = spo.ScheduledProgramUid
GROUP BY e.lmientityUid, sp.ProgramUid
) AS StatsForDistributorClubs
ON Program.ProgramUid = StatsForDistributorClubs.ProgramUid
INNER JOIN LmiEntity
ON LmiEntity.LmiEntityUid = StatsForDistributorClubs.LmiEntityUid
LEFT OUTER JOIN Region
ON Region.RegionId = LMIEntity.RegionId
WHERE (
[Program].LicenseeUid = LmiEntity.LmiEntityUid
OR
[LMIEntityProgram].LMIEntityUid = LmiEntity.LmiEntityUid
)
If you were grouping in your outer query, the extra criteria probably wouldn't be needed, but only your inner query is grouped. Your LEFT JOIN to a grouped inner query can still result in multiple records being returned, for that matter any of your JOINs could be the culprit.
Without seeing sample of duplication it's hard to know where the duplicates originate from, but GROUPING on the outer query would definitely remove full duplicates, or revised JOIN criteria could take care of it.
You have in result set:
SELECT LmiEntity.[DisplayName]
,StatsForDistributorClubs.*
I suppose that you dublicates comes from LMIEntityProgram.
My conjecture: LMIEntityProgram - is a bridge table with both LmiEntityId an ProgramId, but you join only by ProgramId.
If you have several LmiEntityId for single ProgramId - you must have dublicates.
And this dublicates you're filtering in WHERE:
[LMIEntityProgram].LMIEntityUid = LmiEntity.LmiEntityUid
You can do it in JOIN:
LEFT JOIN LMIEntityProgram
ON LMIEntityProgram.ProgramUid = Program.ProgramUid
AND [LMIEntityProgram].LMIEntityUid = LmiEntity.LmiEntityUid
I have found a few good resources that show I should be able to merge a select query with an update, but I just can't get my head around of the correct formatting.
I have a select statement that is getting info for me, and I want to pretty much use those results to Update an account table that matches the accountID in the select query.
Here is the select statement:
SELECT DISTINCT SUM(b.workers)*tt.mealTax as MealCost,b.townID,b.accountID
FROM buildings AS b
INNER JOIN town_tax AS tt ON tt.townID = b.townID
GROUP BY b.townID,b.accountID
So in short I want the above query to be merged with:
UPDATE accounts AS a
SET a.wealth = a.wealth - MealCost
Where MealCost is the result from the select query. I am sure there is a way to put this into one, I just haven't quite been able to connect the dots to get it to run consistently without separating into two queries.
First, you don't need the distinct when you have a group by.
Second, how do you intend to link the two results? The SELECT query is returning multiple rows per account (one for each town). Presumably, the accounts table has only one row. Let's say that you wanted the average MealCost for the update.
The select query to get this is:
SELECT accountID, avg(MealCost) as avg_Mealcost
FROM (SELECT SUM(b.workers)*tt.mealTax as MealCost, b.townID, b.accountID
FROM buildings AS b INNER JOIN
town_tax AS tt
ON tt.townID = b.townID
GROUP BY b.townID,b.accountID
) a
GROUP BY accountID
Now, to put this into an update, you can use syntax like the following:
UPDATE accounts
set accounts.wealth = accounts.wealth + asum.avg_mealcost
from (SELECT accountID, avg(MealCost) as avg_Mealcost
FROM (SELECT SUM(b.workers)*tt.mealTax as MealCost, b.townID, b.accountID
FROM buildings AS b INNER JOIN
town_tax AS tt
ON tt.townID = b.townID
GROUP BY b.townID,b.accountID
) a
GROUP BY accountID
) asum
where accounts.accountid = asum.accountid
This uses SQL Server syntax, which I believe is the same as for Oracle and most other databases. Mysql puts the "from" clause before the "set" and allows an alias on "update accounts".