I have a table
id
repeat customer id
store
date
1
A
07-19-22
2
A
07-19-22
3
A
07-19-22
id
repeat customer id
store
date
1
B
07-19-22
2
B
07-19-22
3
1
B
07-19-22
4
B
07-19-22
and more tables from other store
The problem here is
all stores start with id 1
repeat customer have new id in id column and their original id is retained in repeat customer id column
I have to concatenated all the tables and also keep track of repeating customer for analytics. I have joined all tables using UNION ALL and also created a dummy id column using SELECT ROW_NUMBER() OVER(ORDER BY (SELECT 1)) AS NEW_ID, * FROM CTE, but I have no clue how to capture and assign value to repeat customer id such that I get the table as below
NEW_ID
id
new_repeat_customer_id
repeat customer id
store
date
1
1
A
07-19-22
2
2
A
07-19-22
3
3
A
07-19-22
4
1
B
07-19-22
5
2
B
07-19-22
6
3
4
1
B
07-19-22
7
4
B
07-19-22
The best way to incorporate it, would be to use Alphanumeric String as NEW_ID, and concat STORE and ID to create NEW_ID. For example A_000000001. In that way you can add similar STORE to REPEAT_CUSTOMER_ID as well.
So in this case, instead of NEW_ID=6, you would have NEW_ID=B_000000003 and REPEAT_CUSTOMER_ID would become B_000000001.
But in case that is not possible, you can use query like below to get the output
DB Fiddle Query
with CTE as
(
select * from STORE1
UNION ALL
select * from STORE2
)
,CTE2 as
(SELECT ROW_NUMBER() OVER(ORDER BY (SELECT 1)) AS NEW_ID,t.* from CTE t)
,REPEAT_ID as
(select NEW_ID,ID,REPEAT_CUSTOMER_ID,STORE from CTE2 where REPEAT_CUSTOMER_ID is not null)
,REPEACT_CUSTOMER_ID as
(select c.NEW_ID as NEW_REPEAT_CUSTOMER_ID,r.NEW_ID
from REPEAT_ID r
left join CTE2 c
on c.ID=r.REPEAT_CUSTOMER_ID and c.STORE=r.STORE
)
select c.* , n.NEW_REPEAT_CUSTOMER_ID
from CTE2 c
left join REPEACT_CUSTOMER_ID n
on c.NEW_ID=n.NEW_ID
https://dbfiddle.uk/?rdbms=sqlserver_2014&fiddle=cbe63994b10f9e3b0eff53b0c89d463a
SO basically you have to separate rows where REPEATE customer is present and join it with main table query.
Related
I'm trying to merge the values of two rows based on the value of another row in a different column. Below is my based table
Customer ID
Property ID
Bookings per customer
Cancellations per customer
A
1
0
1
B
2
10
1
C
3
100
1
C
4
100
1
D
5
20
1
Here is the SQL query I used
select customer_id, property_id, bookings_per_customer, cancellations_per_customer
from table
And this is what I want to see. Any ideas the query to get this would be? We use presto SQL
Thanks!
Customer ID
Property ID
Bookings per customer
Cancellations per customer
A
1
0
1
B
2
10
1
C
3 , 4
100
1
D
5
20
1
We can try:
SELECT
customer_id,
ARRAY_JOIN(ARRAY_AGG(property_id), ',') AS properties,
bookings_per_customer,
cancellations_per_customer
FROM yourTable
GROUP BY
customer_id,
bookings_per_customer,
cancellations_per_customer;
I currently have a table with a quantity in it.
ID Code Quantity
1 A 1
2 B 3
3 C 2
4 D 1
Is there anyway to write a sql statement that would get me
ID Code Quantity
1 A 1
2 B 1
2 B 1
2 B 1
3 C 1
3 C 1
4 D 1
I need to break out the quantity and have that many number of rows
Thanks
Here's one option using a numbers table to join to:
with numberstable as (
select 1 AS Number
union all
select Number + 1 from numberstable where Number<100
)
select t.id, t.code, 1
from yourtable t
join numberstable n on t.quantity >= n.number
order by t.id
Online Demo
Please note, depending on which database you are using, this may not be the correct approach to creating the numbers table. This works in most databases supporting common table expressions. But the key to the answer is the join and the on criteria.
One way would be to generate an array with X elements (where X is the quantity). So for rows
ID Code Quantity
1 A 1
2 B 3
3 C 2
you would get
ID Code Quantity ArrayVar
1 A 1 [1]
2 B 3 [1,2,3]
3 C 2 [2]
using a sequence function (e.g, in PrestoDB, sequence(start, stop) -> array(bigint))
Then, unnest the array, so for each ID, you get a X rows, and set the quantity to 1. Not sure what SQL distribution you're using, but this should work!
You can use connect by statement to cross join tables in order to get your desired output.
check my solution it works pretty robust.
select
"ID",
"Code",
1 QUANTITY
from Table1, table(cast(multiset
(select level from dual
connect by level <= Table1."Quantity") as sys.OdciNumberList));
I have a table like this in SQL server 2014:
name
a
a
b
b
b
c
d
d
d
I want to create another column that is S.No. , but serial number value will be assigned according to name column. If name occurs 2 times the value of s.no. will be 1 and 2.If d is 3 times than value for d will be 1,2 and 3 and than again counter will start with 1 for e. so the table will be like:
name S.no.
a 1
a 2
b 1
b 2
b 3
c 1
d 1
d 2
d 3
Any solution? thanks for the help.
Use ROW_NUMBER():
SELECT name, ROW_NUMBER() OVER (PARTITION BY name ORDER BY (SELECT 1)) [S.no.]
FROM T
Just in another way by using Count()
select
Name,
Count(1) over (partition by Name ORDER BY Name ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) as Slno
from MyTable
I need to select Name entries for which none of the rows fulfills a certain requirement. This is best described as an example- lets consider the following table:
Name Number ID
A 1 2
A 2 2
B 1 2
B 2 3
C 3 3
The requirement would be that Number=ID. For the name B this is never the case, so I would like to return the Name B.
Name Number ID
A 1 2
A 2 2 <---- fulfills requirement for A
B 1 2
B 2 3
C 3 3 <---- fulfills requirement for C
Is this possible in SQL?
You can use a NOT EXISTS clause
select * from Table1 t1
where not exists (select null
from Table1
where t1.Name = Name
and Number = Id)
If you just want the names which don't fulfill the requirement, just change the select to
select distinct t1.Name
see SqlFiddle with both versions.
Try this
Select Name
from table
where name not in (Select distinct name from table where number = id )
It's my first question here so I hope I can explain it well enough,
I want to order my data by amount of occurrences in the table.
My table is like this:
id Daynr
1 2
1 4
2 4
2 5
2 6
3 1
4 2
4 5
And I want it to sort it like this:
id Daynr
3 1
1 2
1 4
4 2
4 5
2 4
2 5
2 6
Player #3 has one day in the table, and Player #1 has 2.
My table is named "dayid"
Both id and Daynr are foreign keys, together making it a primary key
I hope this explains my problem enough, Please ask for more information it's my first time here.
Thanks in advance
You can do this by counting the number of times that things occur for each id. Most databases support window functions, so you can do this as:
select id, daynr
from (select t.*, count(*) over (partition by id) as cnt
from table t
) t
order by cnt, id;
You can also express this as a join:
select t.id, t.daynr
from table as t inner join
(select id, count(*) as cnt
from table
group by id
) as tg
on t.id = tg.id
order by tg.cnt, id;
Note that both of these include the id in the order by. That way, if two ids have the same count, all rows for the id will appear together.