Hi I have doubt in sql server
dept
+---------+--------+
| deptkey | deptno |
+---------+--------+
| 1 | 100 |
| 2 | 101 |
| 3 | -1 |
+---------+--------+
loc
+--------+-------+
| lockey | locid |
+--------+-------+
| 1 | 200 |
| 2 | 201 |
| 3 | -1 |
+--------+-------+
trans
+----+--------+-------+------+
| id | deptno | locid | Name |
+----+--------+-------+------+
| 1 | 100 | 201 | abc |
| 2 | 101 | 203 | def |
| 3 | 103 | 200 | rav |
| 4 | 105 | 204 | jai |
| 1 | 101 | 200 | kal |
| 4 | 100 | 206 | lo |
+----+--------+-------+------+
here tran deptno= dept.deptno then corresponding key values bring if not match then we need to unmatched deptno assign -1 and corresponding key need to retrive
similar tran locid=loc.locid
based on above tables I want output like below
+----+------+---------+--------+
| id | Name | deptkey | lockey |
+----+------+---------+--------+
| 1 | abc | 1 | 2 |
| 2 | def | 2 | 3 |
| 3 | rav | 3 | 1 |
| 4 | jai | 3 | 3 |
| 1 | kal | 2 | 1 |
| 4 | lo | 1 | 3 |
+----+------+---------+--------+
I tried like below query
SELECT a.[id],a.name ,b.deptkey,c.lockey
FROM [trans] a left join dept b on a.deptno=b.deptno
left join loc c on a.locid=c.locid
above query not given expected result can you please tell me how to write query to achive this task in sql server
SELECT a.[id],a.name ,
(CASE WHEN b.deptkey IS NULL THEN (select deptkey from DEPT WHERE DeptNo = -1)
ELSE b.deptkey END) AS 'deptkey',
(CASE WHEN c.lockey IS NULL THEN (select LocKey from LOC WHERE LocId = -1)
ELSE c.lockey END) AS 'lockey '
FROM [trans] a left join dept b on a.deptno=b.deptno
left join loc c on a.locid=c.locid
http://www.sqlfiddle.com/#!3/389463/2
SELECT a.[id],a.name ,b.deptkey,c.lockey
FROM [trans] a left join dept b on isnull(a.deptno,-1)=isnull(b.deptno,-1)
left join loc c on a.locid=c.locid
try with this...
SELECT
a.[id]
, a.name
, ISNULL(b.deptkey,-1) AS [deptkey]
, ISNULL(b.lockey,-1) AS [lockey]
FROM [trans] a
left join dept b
on a.deptno = b.deptno
left join loc c
on a.locid = c.locid
When the value is not found ISNULL, change the result to -1 instead of NULL. You can just change the -1 with any default value you prefer as unmatched.
OR if you want a query driven default value (get the last record as the default value). You can change your script as presented below.
SELECT
a.[id]
, a.name
, ISNULL(b.deptkey,(SELECT TOP 1 deptno from dept ORDER BY deptkey DESC)) AS [deptkey]
, ISNULL(b.lockey,(SELECT TOP 1 locid from loc ORDER BY lockey DESC)) AS [lockey]
FROM [trans] a
left join dept b
on a.deptno = b.deptno
left join loc c
on a.locid = c.locid
Related
Sorry for the vague title, but I don't know how to word this type of problem better. Here is a simple example to explain it. I have to tables: OrderItemList and OrderHistoryLog.
OrderItemList:
|------------------------------|
| OrderNo | ItemNo | Loc | Qty |
|------------------------------|
| 100 | A | 1 | 1 |
| 101 | A | 1 | 2 |
| 102 | A | 1 | 1 |
| 103 | A | 2 | 1 |
| 104 | A | 2 | 1 |
OrderHistoryLog:
|------------------------------|
| OrderNo | ItemNo | Loc | Qty |
|------------------------------|
| 50 | A | 1 | 5 |
| 51 | A | 1 | 2 |
| 100 | A | 1 | 1 |
| 102 | A | 1 | 3 |
| 103 | A | 2 | 1 |
I need to show the records in the OrderItemList along with a LocHistQty field, which is the sum(Qty) from the OrderHistoryLog table for a given Item and Location, but only for the orders that are present in the OrderItemList.
For the above example, the result should be:
Result:
|------------------------------------------------------
| OrderNo | ItemNo | Loc | Qty | HistQty | LocHistQty |
|------------------------------|-----------------------
| 100 | A | 1 | 1 | 1 | 4 |
| 101 | A | 1 | 2 | 0 | 4 |
| 102 | A | 1 | 1 | 3 | 4 |
| 103 | A | 2 | 1 | 1 | 1 |
| 104 | A | 2 | 1 | 0 | 1 |
It is the last field, LocHistQty that I could use some help with. Here is what I started with (does not work):
select OI.OrderNo, OI.ItemNo, OI.Loc, OI.Qty, IFNULL(OL.Qty, 0) as HistQty, OL2.LocHistQty
from OrderItemList OI
left join OrderItemLog OL on OL.OrderNo = OI.OrderNo and OL.ItemNo = OI.ItemNo
join
(
select ItemNo, Loc, sum(qty) as LocHistQty
from zOrderItemLog
group by ItemNo, Loc
) as OL2
on OL2.ItemNo = OI.ItemNo and OL2.Loc = OI.Loc
order by OrderNo
The issue is with the above SQL is that LocHistQty contains the summary of the Qty for all orders (=11 for Loc 1 and 1 for Loc 2), not only the ones in OrderItemList.
Lastly, the real data is voluminous and query performance is important.
Help would be much appreciated.
The subquery can join with OrderItemList to restrict the order numbers that it sums.
select OI.OrderNo, OI.ItemNo, OI.Loc, OI.Qty, IFNULL(OL.Qty, 0) as HistQty, OL2.LocHistQty
from OrderItemList OI
left join OrderItemLog OL on OL.OrderNo = OI.OrderNo and OL.ItemNo = OI.ItemNo
join
(
select OL.ItemNo, OL.Loc, sum(OL.qty) as LocHistQty
from OrderItemLog AS OL
JOIN OrderItemList AS OI ON OL.OrderNo = OI.OrderNo
group by OL.ItemNo, OL.Loc
) as OL2
on OL2.ItemNo = OI.ItemNo and OL2.Loc = OI.Loc
order by OrderNo
DEMO
Option 1
SELECT
OrderNo,
ItemNo,
Loc,
Qty,
(SELECT
Qty
FROM
OrderHistoryLog AS A
WHERE
A.OrderNo = B.OrderNo AND A.Loc = B.Loc) AS HistQty,
(SELECT
SUM(Qty)
FROM
OrderHistoryLog AS D
WHERE
D.OrderNo = B.OrderNo AND D.Loc = B.Loc) AS LocHistQty
FROM
OrderItemList AS B;
Option 2
SELECT
B.OrderNo,
B.ItemNo,
B.Loc,
B.Qty,
C.Qty AS HistQty,
(SELECT
SUM(Qty)
FROM
OrderHistoryLog AS A
WHERE
A.OrderNo = B.OrderNo AND A.Loc = B.Loc) AS LocHistQty
FROM
OrderItemList AS B,
OrderHistoryLog AS C
WHERE
C.OrderNo = B.OrderNo AND C.Loc = B.Loc;
I am trying to join two tables with respect to the max values for the values column. I would like to produce the expected results as shown below based on the max value while joining
select * from order
-------------------------
| ID | value | Name |
-------------------------
| 1 | 23 | REM |
| 2 | 0 | SER |
| 3 | 13 | MH |
| 4 | 3 | MH |
| 5 | 1 | MP |
-------------------------
select * from product
-------------------------
| ID | value | Name |
-------------------------
| 1 | 2 | ABC |
| 2 | 2 | DEG |
| 3 | 17 | XYZ |
-------------------------
Desired result:
-------------------------
| ID | Value | Name |
-------------------------
| 1 | 23 | REM |
| 2 | 2 | DEG |
| 3 | 17 | XYZ |
| 4 | 3 | MH |
| 5 | 1 | MP |
-------------------------
I have tried something like below but it's not fetching the value (NAME) from other table
SELECT
MAX(IF(a.value >b.value , a.value ,b.value )) AS Value
from order a left join product b on a.ID= b.ID
Please suggest how to get the expected result from these two tables.
Below is for BigQuery Standard SQL
#standardsql
select as value array_agg(struct(id, value, name) order by value desc limit 1)[offset(0)]
from
(
select * from `project.dataset.order`
union all
select * from `project.dataset.product`
)
group by id
with output
You can do this using a full join:
select id,
(case when p.val is null or p.val < o.val then o.val else p.val end),
(case when p.val is null or p.val < o.val then o.name else p.name end)
from product p full join
order o
using (id);
I just find this the simplest way to think about the problem.
I have a PostgreSQL database linked to a Drill instance.
Whenever I am trying to join 2 tables which both have a column name and whenever I want to select this name Drill selects the wrong name column. What am I doing wrong?
Given the following 2 tables:
Department
| id | name |
|----|------|
| 1 | A |
| 2 | B |
Employee
| id | name | dept | salary |
|----|------|------|--------|
| 1 | U | 1 | 100 |
| 2 | V | 1 | 75 |
| 3 | W | 1 | 120 |
| 4 | X | 2 | 95 |
| 5 | Y | 2 | 140 |
| 6 | Z | 2 | 55 |
Running
select employee.name, employee.salary
from employee
inner join department on employee.dept = department.id
where department.name = 'A'
returns
| name | salary |
|------|--------|
| A | 100 |
| A | 75 |
| A | 120 |
Running
select dept.name, employee.salary
from employee
inner join department on employee.dept = department.id
where department.name = 'A'
returns
| name | salary |
|------|--------|
| null | 100 |
| null | 75 |
| null | 120 |
What does work, but seems very silly to me, is:
select dept.name, employee.salary
from employee
inner join (select id, name as deptname from department) as department on employee.dept = department.id
where department.deptname = 'A'
This seems to be because you use
select dept.name, [...]
But you have never assigned an alias for the table department (department AS dept). Hence
select department.name, [...]
should yield the value you are looking for.
How to select all addons which a specific user has not buyed or are no longer valid?
Assuming currentdate is 2017-03-02 17:00:00
Table1 (users):
+-----------+----------+
| id | username |
+-----------+----------+
| 1 | Walter |
| 2 | Hank |
| 3 | John |
+-----------+----------+
Table2 (buyLog):
+-----------+----------+------------+---------------------+
| id | idUsers | idItems | validUntil |
+-----------+----------+------------+---------------------+
| 1 | 1 | 1 | 2016-03-02 14:15:47 |
| 2 | 1 | 1 | 2018-03-02 14:15:47 |
| 3 | 1 | 2 | 2016-03-02 14:15:47 |
| 4 | 2 | 1 | 2018-03-02 14:15:47 |
+-----------+----------+------------+---------------------+
Table3 (addons):
+-----------+----------+
| id | name |
+-----------+----------+
| 1 | Foo |
| 2 | Bar |
| 3 | Lorem |
+-----------+----------+
Expected output for user with id 1 should be:
+-----------+----------+
| id | name |
+-----------+----------+
| 2 | Bar |
| 3 | Lorem |
+-----------+----------+
See SQL Fiddle here: http://sqlfiddle.com/#!9/16356
Where I have the most problems is to handle the validUntil in the leftJoin.
I think I have to group by during the left join to tread only the most recent validUntil record. Maybe using max(validUntil)?
This code will work
http://sqlfiddle.com/#!9/16356/1/0
SELECT
C.ID AS 'ID',
C.NAME AS 'NAME'
FROM
(SELECT
A.id AS 'ID',A.name AS 'NAME',
CASE
WHEN B.YY > '2017-03-02 17:00:00' THEN 0
ELSE 1 END AS 'Tag'
FROM
addons AS A
LEFT JOIN
(SELECT idItems AS 'XX', MAX(validUntil) AS 'YY'
FROM
buyLog
WHERE idUsers = 1 GROUP BY 1) AS B
ON
A.id = B.XX) AS C
WHERE
C.Tag = 1
My sense is that neither your explanation nor your data set and desired result are adequate to the task of explaining the problem. The following query produces the desired result, but perhaps that's just coincidence...
SELECT a.*
FROM addons a
LEFT
JOIN buylog b
ON b.iditems = a.id
AND b.validuntil > NOW()
LEFT
JOIN users u
ON u.id = b.idusers
AND u.id = 1
WHERE b.validuntil IS NULL
AND u.id IS NULL;
I am looking to get all values from first table along with joinned values from second table.
Table 1 is fee_category with fields:
id | Category
1 | A
2 | B
3 | C
4 | D
Table 2 is fee_charge with fields:
id | std_id | particularID | CategoryID | assign | amount
1 | 1 | 1 | 1 | 0 | 1000
2 | 1 | 1 | 2 | 1 | 12000
3 | 1 | 2 | 3 | 0 | 3000
4 | 1 | 2 | 4 | 0 | 10
5 | 2 | 1 | 2 | 0 | 100
6 | 2 | 2 | 3 | 0 | 120
Base table is "fee_category" from which I need all values left joining with "fee_charge" from where I need values or NULL for a particular std_id and particularID
SELECT fee_category.id, fee_category.Category, fee_charge.std_id
, fee_charge.particularID, fee_charge.CategoryID, fee_charge.assign, fee_charge.amount FROM fee_category
LEFT join fee_charge on fee_category.id=fee_charge.CategoryID
where (fee_charge.std_id = 1 OR fee_charge.std_id IS NULL)
AND (fee_charge.particularID = 1 OR fee_charge.particularID IS NULL)
group By fee_category.id
order By fee_charge.assign DESC
Here I am trying to get all categories of std_id=1 and particularID=1
Correct result should be
id | Category | std_id | particularID | CategoryID | assign | amount
1 | A | 1 | 1 | 1 | 0 | 1000
1 | B | 1 | 1 | 2 | 1 | 12000
1 | C | 1 | NULL | NULL | NULL | NULL
1 | D | 1 | NULL | NULL | NULL | NULL
I am trying various versions of the above query but not getting proper result. Please help
SELECT fee_category.id
, fee_category.Category
, X.std_id
, X.particularID
, X.CategoryID
, X.assign
, X.amount
FROM fee_category
LEFT JOIN
(SELECT * FROM fee_charge
WHERE fee_charge.std_id = 1
AND fee_charge.particularID = 1) AS X
ON x.CategoryID = fee_category.id
It's very hard to follow when the fiddle doesn't match the question, so I may have misunderstood, but perhaps you're after something like this...
SELECT x.id
, z.category
, x.std_id
, y.particularID
, y.categoryID
, y.assign
, y.amount
FROM fee_charge x
LEFT
JOIN fee_charge y
ON y.id = x.id
AND y.particularID = 1
JOIN fee_category z
ON z.id = x.categoryID
WHERE x.std_id = 1;