SELECT b.SERVICENAME,
a.PARAMETERNAME,
a.PARAMETERVALUE
FROM serviceParameter a,
subscriberService b,
serviceName c
WHERE a.SUBSCRIBERKEY (+) = 15677889
AND b.SUBSCRIBERKEY = 15677889
AND b.SERVICENAME = a.SERVICENAME(+)
AND c.SERVICENAME = b.SERVICENAME
AND c.MULTIINSTANCE = '0'
ORDER BY a.SERVICENAME;
How can I migrate the above code to PostgresSQL?
You have to translate it along these lines:
SELECT ...
FROM a, b
WHERE a.x = b.y(+)
AND a.p = 42
AND b.q(+) = 'foo';
will become:
SELECT ...
FROM a LEFT OUTER JOIN b
ON a.x = b.y
AND b.q = 'foo'
WHERE a.p = 42;
That is:
The side with the (+) becomes the right side of a LEFT OUTER JOIN (or, equivalently, the left side of a RIGHT OUTER JOIN).
All the WHERE conditions that contain a (+) lose that adornment and go into the join condition.
It is easy to translate Oracle's join syntax to standard conforming syntax because the latter is more powerful (and easier to read to boot).
Related
This query returns a wide table containing horse-race results. However, one horse has multiple trainers and so this join is returning the same race-result for each trainer the horse has. How do I work around this? I've been playing around with Group By but Oracle doesn't seem to like it.
SELECT
b.meet_name AS Course,
a.race_time AS Time,
(f.jf_name||' '||f.jl_name) AS Jockey,
e.horse_name AS Horse,
c.odds,
d.place,
d.race_comment AS Note,
(g.bf_name||' '||g.bl_name) AS Breeder,
(h.tf_name||' '||h.tl_name) AS Trainer,
a.race_type AS Type,
a.distance AS Furlongs,
a.prize_money AS "Prize Money",
a.ground AS Ground
FROM proj_race_details a
JOIN proj_meet b ON a.meet_id = b.meet_id
JOIN proj_entry c ON c.race_id = a.race_id
JOIN proj_results d ON d.race_id = c.race_id AND d.horse_id = c.horse_id
JOIN proj_horses e ON e.horse_id = d.horse_id
JOIN proj_jockey f ON f.jockey_id = d.jockey_id
JOIN proj_breeder g ON g.breeder_id = e.breeder_id
JOIN proj_trainer h ON h.trainer_id = e.trainer_id;
EDIT:
This query would select only one trainer per horse. The trainer's name would be the first one, sorted alphabetically.
SELECT
b.meet_name AS Course,
a.race_time AS Time,
(f.jf_name||' '||f.jl_name) AS Jockey,
e.horse_name AS Horse,
c.odds,
d.place,
d.race_comment AS Note,
(g.bf_name||' '||g.bl_name) AS Breeder,
h.Trainer,
a.race_type AS Type,
a.distance AS Furlongs,
a.prize_money AS "Prize Money",
a.ground AS Ground
FROM proj_race_details a
JOIN proj_meet b ON a.meet_id = b.meet_id
JOIN proj_entry c ON c.race_id = a.race_id
JOIN proj_results d ON d.race_id = c.race_id AND d.horse_id = c.horse_id
JOIN proj_horses e ON e.horse_id = d.horse_id
JOIN proj_jockey f ON f.jockey_id = d.jockey_id
JOIN proj_breeder g ON g.breeder_id = e.breeder_id
JOIN
(SELECT ph.horse_id AS horse_id, MIN(pj.tf_name||' '||pj.tl_name) AS Trainer
FROM proj_trainer pj INNER JOIN proj_horses ph
ON pj.trainer_id = ph.trainer_id
GROUP BY ph.horse_id
) h
ON h.horse_id = e.horse_id;
I made this query in raw SQL and need some help moving to Doctrine:
SELECT
re . *, t.tipo, m.patente, o.nombre, de.revisado
FROM
sdriving_registros_emisores re
LEFT JOIN
sdriving_turno t ON re.idturno = t.idturno
LEFT JOIN
sdriving_maquina_emisor me ON me.idmaquinaemisor = re.maquinaemisorid
LEFT JOIN
sdriving_maquina m ON me.idmaquina = m.idmaquina
LEFT JOIN
sdriving_operador o ON re.idoperador = o.idoperador
LEFT JOIN
sdriving_detalle_emisores de ON de.idregistros = re.idregistros
WHERE
o.idempresa = 1
Also I wish to know what's the best method in perfomance: executing raw query or using Doctrine Query or something else
I am trying to do a left outer join on three tables. I know there is a way to do it in one variable but I haven't been able to figure it out. Instead I have performed two separate left outer joins and then did a left out join on those. Here is my code for that:
var outerJoin1 =
(from h in resultHours
join u in results on new {h.PhysicalUnitId, h.MonthNum} equals new {u.PhysicalUnitId, u.MonthNum} into outer
from grouping in outer.DefaultIfEmpty()
select new {timeKey = h, Key = grouping});
var outerJoin2 =
(from h in resultHours
join s in serviceHrsResults on new {h.PhysicalUnitId, h.MonthNum} equals new {s.PhysicalUnitId, s.MonthNum} into outer2
from grouping in outer2.DefaultIfEmpty()
select new {timeKey = h, Key = grouping});
var outerJoin =
(from a in outerJoin1
join b in outerJoin2 on new {a.timeKey.PlantId, a.timeKey.MonthNum} equals new {b.timeKey.PlantId, b.timeKey.MonthNum} into outer
from grouping in outer.DefaultIfEmpty()
select new{timeKey = a, Key = grouping}).Distinct();
I have tried putting the above together in one variable I can't get it to work. Here is what I have tried:
var outerjoin =
from h in resultHours
join u in results on new {h.PhysicalUnitId, h.MonthNum} equals new {u.PhysicalUnitId, u.MonthNum} into outer
from grouping in outer.DefaultIfEmpty()
from hr in resultHours
join s in serviceHrsResults on new {hr.PhysicalUnitId, hr.MonthNum} equals new {s.PhysicalUnitId, s.MonthNum} into outer2
from grouping in outer2.DefaultIfEmpty()
select new {timeKey = h && timeKey = hr, Key = grouping};
The problem with this is the two groupings conflict. i'm pretty sure I just need a single grouping right before the select but cannot figure out how to use the "grouping in" and include both outer.DefaultIfEmpty() and outer2.DefaultIfEmpty().
I would appreciate it if someone could enlighten me.
You are using duplicate range variable ids - you've got 2x grouping.
- Which grouping is it that you want in the result set ?
- What is this line expected to achieve?
timeKey = h && timeKey = hr - how do you want to combine those in the projection ?
I would try the query below, but I've changed the select part of it as your combined version doesn't make sense to me.
Let me know if it at all works for you as without data it's not easy to test this, so I can't be sure that the new version is fine.
var outerjoin =
from h in resultHours
join u in results on new {h.PhysicalUnitId, h.MonthNum} equals new {u.PhysicalUnitId, u.MonthNum} into outer
from grouping1 in outer.DefaultIfEmpty()
//from hr in resultHours
join s in serviceHrsResults on new {grouping1.PhysicalUnitId, grouping1.MonthNum} equals new {s.PhysicalUnitId, s.MonthNum} into outer2
from grouping2 in outer2.DefaultIfEmpty()
select new {timeKey = h, Key1 = grouping1, Key2 = grouping2};
I am trying to create an outer join statement in LINQ and am not having much luck. I know that Performing an outer join requires two steps:
(1) Convert the join into a group join with into
(2) Use DefaultIfEmpty() on the group to generate the null value you expect if the joined result set is empty.
I have been using this code as an example:
var query = (from p in dc.GetTable<Person>()
join pa in dc.GetTable<PersonAddress>() on p.Id equals pa.PersonId into tempAddresses
from addresses in tempAddresses.DefaultIfEmpty()
select new { p.FirstName, p.LastName, addresses.State });
So I tried to do this:
var outerJoin =
from h in resultHours
join u in results on h.Key equals u.Key into outer
from dictionary in outer.DefaultIfEmpty()
select new {
The problem is that intellisense doesn't recognize anything in the select new {} statement. I've tried u. and h., even dictionary.
The problem I may be running into is that I'm trying to outer join two dictionaries. It doesn't seem to like that, although this is what I was told I need to do. I am obviously doing something wrong or not understanding something.
I need to join the dictionary results.Unit with the dictionary resultHours.Hours because my output is missing unitId fields under certain conditions. Doing an outer join is supposed to clear this up.
Here is the code for results:
var results =
(from v in VDimUnit
join vf in VFactEnergyAllocation on v.UnitKey equals vf.UnitKey
join vd in VDimGadsEvent on vf.GadsEventKey equals vd.GadsEventKey
join vt in VDimTime on vf.TimeKey equals vt.TimeKey
where typeCodes.Contains(vd.GadsEventTypeCode)
&& vt.YearNum >= (year - 3) && vt.YearNum <= year
group vf by new {v.PlantId, v.PhysicalUnitId, v.NetDependableCapacity, v.NetMaximumCapacity,
vt.MonthNum} into groupItem
select new {groupItem.Key.PlantId, groupItem.Key.PhysicalUnitId, groupItem.Key.NetMaximumCapacity,
groupItem.Key.MonthNum, PO_HRS = groupItem.Sum(
x=> (float)x.AllocatedEnergyMwh / groupItem.Key.NetDependableCapacity),
UO_HRS = groupItem.Sum(x=> (float)x.AllocatedEnergyMwh / groupItem.Key.NetDependableCapacity),
Unit = groupItem.Count(), groupItem.Key}).ToDictionary(x=> x.Key, x=> x);
Here is the code for resultHours:
var resultHours =
(from vt in VDimTime
join vf in VFactEnergyAllocation on vt.TimeKey equals vf.TimeKey
join vd in VDimGadsEvent on vf.GadsEventKey equals vd.GadsEventKey
join v in VDimUnit on vf.UnitKey equals v.UnitKey
group vt by new {v.PlantId, v.PhysicalUnitId, v.NetDependableCapacity, v.NetMaximumCapacity,
vt.MonthNum} into groupItem
select new {groupItem.Key.PlantId, groupItem.Key.PhysicalUnitId, groupItem.Key.NetMaximumCapacity,
Hours = groupItem.Count(), groupItem.Key}).ToDictionary(x=> x.Key.ToString(), x=> x.Hours);
This is presently how I have my output. It will change after I figure out how to do the outer join.
var finalResults =
(from r in results
orderby r.Key.MonthNum, r.Key.PlantId, r.Key.PhysicalUnitId
select new {Site = r.Key.PlantId, Unit = r.Key.PhysicalUnitId, r.Key.MonthNum, Numerator = r.Value.PO_HRS, Denominator =
resultHours[r.Key.ToString()], Weight = r.Key.NetMaximumCapacity, Data_Indicator = DATA_INDICATOR,
Budgeted = budgetedPlannedOutageHrs, Industry_Benchmark = INDUSTRY_BENCHMARK, Comments = comments,
Executive_Comments = executiveComments, Fleet_Exec_Comments = fleetExecComments});
I'm at a loss. The LINQ outer join examples I have found apaprently do not apply when joining dictionaries.
I have the following SQL query:-
select distinct * from dbo.Profiles profiles
left join ProfileSettings pSet on pSet.ProfileKey = profiles.ProfileKey
left join PlatformIdentities pId on pId.ProfileKey = profiles.Profilekey
I need to convert it to a LinqToEntities expression. I have tried the following:-
from profiles in _dbContext.ProfileSet
let leftOuter = (from pSet in _dbContext.ProfileSettingSet
select new
{
pSet.isInternal
}).FirstOrDefault()
select new
{
profiles.ProfileKey,
Internal = leftOuter.isInternal,
profiles.FirstName,
profiles.LastName,
profiles.EmailAddress,
profiles.DateCreated,
profiles.LastLoggedIn,
};
The above query works fine because I haven't considered the third table "PlatformIdentities". Single left outer join works with what I have done above. How do I include PlatformIdentities (the 3rd table) ? I basically want to translate the SQL query I specified at the beginning of this post (which gives me exactly what I need) in to LinqToEntities.
Thanks
Let me know if you want to select something different, but a true join is below
from p in _dbContext.ProfileSet
join ps in _dbContext.ProfileSettings on p.ProfileKey = ps.ProfileKey into a
join pi in _dbContext.PlatformIdentities on p.ProfileKey = pi.ProfileKey into b
select new
{
profiles.ProfileKey,
profiles.FirstName,
profiles.LastName,
profiles.EmailAddress,
profiles.DateCreated,
profiles.LastLoggedIn,
PlatformSettings = a.Select(x=>x),
PlatformIdentities = b.Select(y=>y)
}