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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
199093 changed files with 3378972 additions and 0 deletions
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39
Task/Top-rank-per-group/SQL/top-rank-per-group-1.sql Normal file
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create table EMP
(
EMP_ID varchar2(6 char),
EMP_NAMEvarchar2(20 char),
DEPT_ID varchar2(4 char),
SALARY number(10,2)
);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E21437','John Rappl','D050',47000);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E10297','Tyler Bennett','D101',32000);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E00127','George Woltman','D101',53500);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E63535','Adam Smith','D202',18000);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E39876','Claire Buckman','D202',27800);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E04242','David McClellan','D101',41500);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E41298','Nathan Adams','D050',21900);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E43128','Richard Potter','D101',15900);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E27002','David Motsinger','D202',19250);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E03033','Tim Sampair','D101',27000);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E10001','Kim Arlich','D190',57000);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E16398','Timothy Grove','D190',29900);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E01234','Rich Holcomb','D202',49500);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E16399','Timothy Grave','D190',29900);
insert into EMP (EMP_ID, EMP_NAME, DEPT_ID, SALARY)
values ('E16400','Timothy Grive','D190',29900);
COMMIT;

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Task/Top-rank-per-group/SQL/top-rank-per-group-2.sql Normal file
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select case LINE
when 10 then
'Tot.' || LPAD(POPULATION, 2) || ' Employees in ' || TIE_COUNT ||
' deps.Avg salary:' || TO_CHAR(SALARY, '99990.99')
when 30 then
'-'
when 50 then
'Department: ' || DEPT_ID || ', pop: ' || POPULATION ||
'. Avg Salary: ' || TO_CHAR(SALARY, '99990.99')
when 70 then
LPAD('Employee ID', 14) || LPAD('Employee name', 20) ||
LPAD('Salary', 9) || 'Rank'
when 90 then
LPAD('+', 14, '-') || LPAD('+', 20, '-') || LPAD('+', 9, '-') ||
LPAD('+', 4, '-')
else
LPAD(' ', 8) || LPAD(EMP_ID, 6) || LPAD(EMP_NAME, 20) ||
TO_CHAR(SALARY, '99990.99') || LPAD(case when TIE_COUNT = 1 then ' ' else 'T' end || RANK, 4)
end "Top rank per group"
from (select 10 LINE
,null EMP_ID
,null EMP_NAME
,' ' DEPT_ID
,avg(SALARY) SALARY
,0 RANK
,count(distinct DEPT_ID) TIE_COUNT
,count(*) POPULATION
from EMP
union all
select 30 LINE
,null EMP_ID
,null EMP_NAME
,DEPT_ID
,0 SALARY
,0 RANK
,0 TIE_COUNT
,0 POPULATION
from EMP
group by DEPT_ID
union all
select 50 LINE
,null EMP_ID
,null EMP_NAME
,DEPT_ID
,avg(SALARY) SALARY
,0 RANK
,0 TIE_COUNT
,count(*) POPULATION
from EMP
group by DEPT_ID
union all
select 70 LINE
,null EMP_ID
,null EMP_NAME
,DEPT_ID
,0 SALARY
,0 RANK
,0 TIE_COUNT
,0 POPULATION
from EMP
group by DEPT_ID
union all
select 90 LINE
,null EMP_ID
,null EMP_NAME
,DEPT_ID
,0 SALARY
,0 RANK
,0 TIE_COUNT
,0 POPULATION
from EMP
group by DEPT_ID
union all
select 110 LINE
,EMP_ID
,EMP_NAME
,DEPT_ID
,SALARY
,(select count(distinct EMP4.SALARY)
from EMP EMP4
where EMP4.DEPT_ID = EMP3.DEPT_ID
and EMP4.SALARY >= EMP3.SALARY) RANK
,(select count(*)
from EMP EMP2
where EMP2.DEPT_ID = EMP3.DEPT_ID
and EMP2.SALARY = EMP3.SALARY) TIE_COUNT
,0 POPULATION
from EMP EMP3
where $topN >= -- Here is the meat, Correlated subquery
(select count(distinct EMP4.SALARY)
from EMP EMP4
where EMP4.DEPT_ID = EMP3.DEPT_ID
and EMP4.SALARY >= EMP3.SALARY))
order by DEPT_ID ,LINE ,SALARY desc, EMP_ID;

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Task/Top-rank-per-group/SQL/top-rank-per-group-3.sql Normal file
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WITH ranked_emp AS (
SELECT emp_name
,dept_id
,salary
,DENSE_RANK() OVER (PARTITION BY dept_id ORDER BY salary ) ranking
FROM emp
)
SELECT dept_id
,ranking
,emp_name
,salary
FROM ranked_emp
WHERE ranking <= 2
ORDER BY dept_id, ranking;