Help with Oracle SQL Developer - Subquery & Join will not work.
Greetings all,
Hopefully there is someone out there on this forum who can help with this Oracle SQL Developer issue I have.
Here is the code:
Code:
CREATE OR REPLACE VIEW
SALES_OVER_30000_WITH_TOTAL
AS
SELECT
E.FIRST_NAME || ' ' || E.LAST_NAME AS EMPLOYEE_NAME,
SUM(SO.TOTAL) AS TOTAL_SOLD
FROM
EMPLOYEE E
LEFT OUTER JOIN
CUSTOMER C
ON
C.SALESPERSON_ID = E.EMPLOYEE_ID
LEFT OUTER JOIN
SALES_ORDER SO
ON
SO.CUSTOMER_ID = C.CUSTOMER_ID
GROUP BY EMPLOYEE_NAME
HAVING SUM(SO.TOTAL) > 30000
;
SELECT
EMPLOYEE_NAME,
TOTAL_SOLD
FROM
SALES_OVER_30000_WITH_TOTAL
ORDER BY EMPLOYEE_NAME DESC
;
Hello,
This post is already here but want to do this with another way
Merge multiples files with multiples duplicates keys by filling "NULL" the void columns for anothers joinning files
file1.csv:
1|abc
1|def
2|ghi
2|jkl
3|mno
3|pqr
file2.csv:
1|123|jojo
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example sql:
select a.a1,b.b1,c.c1,d.d1,e.e1
from a
left outer join b on a.x=b.x
left outer join c on b.y=c.y
left outer join d on d.z=a.z
inner join a.t=e.t
I know how single outer or inner join works in sql.
But I don't really understand when there are multiple of them.
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