I have table with up to 50 rows... like given below.
ID menu dispOdr ParntID
---------------------
1 abc 1 0
2 cde 2 0
3 fgh 1 2
4 ghdfdj 2 2
5 tetss 1 1
6 uni 3 0
but I want to be sorted
Like
ID menu dispOdr ParntID
---------------------
1 abc 1 0
5 tetss 1 1
2 cde 2 0
3 fgh 1 2
4 ghdfdj 2 2
6 uni 3 0
If have any query please let me know.. thanks in advance.
I am using sql server 2014
I think you need your current vs. desired output reversed. You say you want the menu column sorted, but it appears that it already is.
So assuming you are actually starting with the second table, you can sort the menu column simply using ORDER BY:
SELECT *
FROM mytable
ORDER BY menu ASC
I think that the query below produces the required output:
SELECT t1.ID, t1.menu, t1.dispOdr, t1.ParntID
FROM mytable AS t1
LEFT JOIN mytable AS t2 ON t1.ParntID = t2.ID
ORDER BY CASE
WHEN t1.ParntID = 0 THEN t1.dispOdr
ELSE t2.dispOdr
END,
CASE
WHEN t1.ParntID = 0 THEN 1
ELSE 2
END,
t1.dispOdr
The first CASE expression groups records according to the dispOdr of their parent. The second CASE places parent on the top of its subgroup. Finally, the last expression used in the ORDER BY clause orders all child records within a subgroup.
Note: The above query works with one level of nesting.
Related
I have two tables. Data in the first table is:
ID Username
1 Dan
2 Eli
3 Sean
4 John
Second Table Data:
user_id Status_id
1 2
1 3
4 1
3 2
2 3
1 1
3 3
3 3
3 3
. .
goes on goes on
These are my both tables.
I want to find the frequency of individual users doing 'status_id'
My expected result is:
username status_id(1) status_id(2) status_id(3)
Dan 1 1 1
Eli 0 0 1
Sean 0 1 2
John 1 0 0
My current code is:
SELECT b.username , COUNT(a.status_id)
FROM masterdb.auth_user b
left outer join masterdb.xmlform_joblist a
on a.user1_id = b.id
GROUP BY b.username, b.id, a.status_id
This gives me the separate count but in a single row without mentioning which status_id each column represents
This is called pivot and it works in two steps:
extracts the data for the specific field using a CASE statement
aggregates the data on users, to make every field value lie on the same record for each user
SELECT Username,
SUM(CASE WHEN status_id = 1 THEN 1 END) AS status_id_1,
SUM(CASE WHEN status_id = 2 THEN 1 END) AS status_id_2,
SUM(CASE WHEN status_id = 3 THEN 1 END) AS status_id_3
FROM t2
INNER JOIN t1
ON t2.user_id = t1._ID
GROUP BY Username
ORDER BY Username
Check the demo here.
Note: This solution assumes that there are 3 status_id values. If you need to generalize on the amount of status ids, you would require a dynamic query. In any case, it's better to avoid dynamic queries if you can.
View of a table
ID
kWh
1
3
1
10
1
8
1
11
2
12
2
4
2
7
2
8
3
3
3
4
3
5
I want to recive
ID
kWh
1
32
2
31
3
12
The table itself is more complex and larger. But the point is this. How can this be done? And I can't know in advance the ID numbers of the first column.
SELECT T.ID,SUM(T.KWH)SUM_KWH
FROM YOUR_TABLE T
GROUP BY T.ID
Do you need this one?
Let's assume your database name is 'testdb' and table name is 'table1'.
SELECT * FROM testdb.table1;
SELECT id, SUM(kwh) AS "kwh2"
FROM stack.table1
WHERE id = 1
keep running the query will all (ids). you will get output.
By following this query you will get desired output.
Hope this helps.
I am trying to update flag in my main table based on the flag in another common table.Both are related with the Foreign Key relationship. But the problem is the flag in another common table is either 0 or 1. So, it should update the flag in the main table as 1 only if all the values for a particular FK is 1.
Suppose that there are 2 tables listed below. XYZ and ABC. Both are related to each other through Foreign Key.
XYZ:
XYZID Posted
1 0
2 0
3 0
4 0
ABC:
ABCID XYZID IsPosted
1 1 1
2 1 1
3 2 0
4 2 0
5 2 0
6 3 1
7 3 0
8 4 0
9 4 0
10 4 1
If you see for XYZID in ABC table the Isposted value is 1 for both. I want that value to be updated in the Posted as 1 of XYZ main table for XYZID 1. But if you look at XYZID value 3 in ABC table for IsPosted then it is 0 and 1. So for XYZID value 3 the Posted value should not be updated in the XYZ table as 1. In general, if all the foreign key value has the IsPosted as 1 then only it should be updated as 1 in the Posted column of XYZ table. If it is 0 or 1 then it should not update in the XYZ table.
I thought of using group by or cursor. But don't know how to start on this.
If anyone can help me in this then would be helpful. It is pretty simple but I am not getting the idea to start on this. Any help would be appreciated.
Update the table by joining a subquery that groups by xyzid the table abc and sets the condition in the having clause:
update t
set posted = 1
from xyz t inner join (
select xyzid from abc
group by xyzid
having sum(case when isposted = 0 then 1 else 0 end) = 0
) a on a.xyzid = t.xyzid
The condition in the having clause could also be written:
having sum(abs(isposted - 1)) = 0
See the demo.
Results:
> XYZID | Posted
> ----: | -----:
> 1 | 1
> 2 | 0
> 3 | 0
> 4 | 0
Assuming there can only be 0 or 1, one way is to use a correlated subquery getting the minimum isposted for an xyzid.
UPDATE main_table
SET posted = (SELECT min(another_common_table.isposted)
FROM another_common_table
WHERE another_common_table.xyzid = main_table.xyzid);
If there is a 0 the minimum will be 0. If there's only 1s it'll be 1.
Try the following:
UPDATE [a]
SET a.[Posted] = [b].[IsPosted]
FROM [a]
INNER JOIN (SELECT [xyzid],
[IsPosted] = MIN(Cast([IsPosted] AS INT))
FROM
[b]
GROUP BY
[xyzid]
HAVING
MIN(Cast([IsPosted] AS INT)) = 1) [b]
ON [a].[xyzid] = [b].[xyzid]
Essentially, the inner query returns only those entries from table B with all 1 values and then updates the A table based on the FK join.
There may be more efficient queries AND this will re-update previously updated A.Posted values and will NOT un-update A.Posted if anything in table B is marked as IsPosted = 0.
I have got an SQL query in Oracle with a multilevel subquery for generating my website navigation in the database. This query has a multilevel subquery because for each user I have to check whether they have the right to access this part of the navigation. The result looks kind of like the following:
ID | ID_PARENT | NAME | LINK
------------------------------------------
1 Main ~/
2 1 Sub1 ~/Sub1
3 1 Sub2 ~/Sub2
4 2 Sub1.1 ~/Sub1.1
5 2 Sub1.2 ~/Sub1.2
6 2 Sub1.3 ~/Sub1.3
The ID_PARENT column refers to the ID column of another row in the same table.
Now what I need is a query that, for each row, gives me the amount of rows in the current query set (because there exist other navigation entries that some users do not have the rights to, and I want to avoid making the same subquery twice) that have the current ID as ID_PARENT, so basically counts the children. With the example above the result I need should look like the following:
ID | ID_PARENT | NAME | LINK | CHILDREN
---------------------------------------------------------
1 Main ~/ 2
2 1 Sub1 ~/Sub1 3
3 1 Sub2 ~/Sub2 0
4 2 Sub1.1 ~/Sub1.1 0
5 2 Sub1.2 ~/Sub1.2 0
6 2 Sub1.3 ~/Sub1.3 0
I have tried a fair share of SQL queries, but none of them get me the result I need. Can anybody help me with this?
You can count() separately the record for your ID_PARENT and then join it with your main query. Something like this:
SELECT A.*, COALESCE(B.RC ,0) AS CHILDREN_NUMBER
FROM YOURTABLE A
LEFT JOIN ( SELECT ID_PARENT,COUNT(*) AS RC FROM YOURTABLE GROUP BY ID_PARENT) B ON A.ID = B.ID_PARENT;
Ouput:
ID ID_PARENT NAME LINK CHILDREN_NUMBER
1 NULL Main / 2
2 1 SUB1 /Sub1 3
3 1 SUB2 /Sub2 0
4 2 SUB1.1 /Sub1.1 0
5 2 SUB1.2 /Sub1.2 0
6 2 SUB1.3 /Sub1.3 0
For example
with q(ID, ID_PARENT, NAME, LINK) as (
-- original query
)
select ID, ID_PARENT, NAME, LINK
,(select count(*) from q q2 where q2.ID_PARENT = q.ID) CHILDREN
from q
Try like this, this is same as above answer by etsa.
select
n.id,n.parent_id,n.name,n.link,coalesce(b.children,0)
from navigation n
left join (select
parent_id as parent,count(id) as children
from navigation group by parent_id) b
on n.id=b.parent;
I currently have a table in SQL that looks like this
PRODUCT_ID_1 PRODUCT_ID_2 SCORE
1 2 10
1 3 100
1 10 3000
2 10 10
3 35 100
3 2 1001
That is, PRODUCT_ID_1,PRODUCT_ID_2 is a primary key for this table.
What I would like to do is use this table to add in a row to tell whether or not the current row is the one that maximizes SCORE for a value of PRODUCT_ID_1.
In other words, what I would like to get is the following table:
PRODUCT_ID_1 PRODUCT_ID_2 SCORE IS_MAX_SCORE_FOR_ID_1
1 2 10 0
1 3 100 0
1 10 3000 1
2 10 10 1
3 35 100 0
3 2 1001 1
I am wondering how I can compute the IS_MAX_SCORE_FOR_ID_1 column and insert it into the table without having to create a new table.
You can try like this...
Select PRODUCT_ID_1, PRODUCT_ID_2 ,SCORE,
(Case when b.Score=
(Select Max(a.Score) from TableName a where a.PRODUCT_ID_1=b. PRODUCT_ID_1)
then 1 else 0 End) as IS_MAX_SCORE_FOR_ID_1
from TableName b
You can use a window function for this:
select product_id_1,
product_id_2,
score,
case
when score = max(score) over (partition by product_id_1) then 1
else 0
end as is_max_score_for_id_1
from the_table
order by product_id_1;
(The above is ANSI SQL and should run on any modern DBMS)