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[[category:remember]]
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===[http://www.adp-gmbh.ch/ora/sql/join/ansi.html ANSI joins in Oracle]===
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[http://www.nyoug.org/Presentations/2002/9ijoin.PDF Presentation] about the ANSI syntax introduced in Oracle 9i
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==traditional Oracle outer join syntax==
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inner join
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<source lang=sql>
 +
select ...
 +
from emp
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join dept on emp.deptno = dept.deptno
 +
</source>
left outer join
left outer join
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<source lang=sql>
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select ...
 +
from emp
 +
left outer join dept on emp.deptno = dept.deptno
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</source>
right outer join
right outer join
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<source lang=sql>
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select ...
 +
from emp
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right outer join dept on emp.deptno = dept.deptno
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</source>
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 +
full join
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<source lang=sql>
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select ...
 +
from emp
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full join dept on emp.deptno = dept.deptno
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</source>
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 +
cross join
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<source lang=sql>
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select ...
 +
from emp
 +
cross join dept
 +
</source>
 +
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===traditional Oracle outer join syntax===
inner join
inner join
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<source lang=sql>
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select ...
 +
from emp, dept
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where emp.deptno = dept.deptno
 +
</source>
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left outer join
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<source lang=sql>
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select ...
 +
from emp, dept
 +
where emp.deptno(+) = dept.deptno
 +
</source>
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TOP or Oracle syntax (Oracle 8.1.6 or higher)
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right outer join
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<source lang=sql>
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select ...
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from emp, dept
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where emp.deptno = dept.deptno(+)
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</source>
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===TOP n SELECT===
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MySQL:
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<source lang=sql>
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select EMPNO, ENAME, JOB, MGR, SQL
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from  EMP
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limit 10 offset 20
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</source>
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Oracle >= 8.1.6:
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<source lang=sql>
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select * from (select
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    EMPNO, ENAME, JOB, MGR, SQL,
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    rank() over(partition by JOB order by HIRE_DATE desc
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) RN
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from EMP
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)
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where RN between 20 and 30
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select EMPNO, ENAME, JOB, MGR, SAL,
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    rank() over
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      (ORDER BY SAL Desc NULLS LAST) as RANK,
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    dense_rank() over
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      (ORDER BY SAL Desc NULLS LAST) as DRANK
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from EMP
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order by SAL desc NULLS last;
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</source>
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MS SQL Server:
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<source lang=sql>
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select top 10 EMPNO, ENAME, JOB, MGR
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from EMP
 +
</source>
 +
 
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Sybase:
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<source lang="sql">
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set rowcount 10
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select COLUMNS
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from TABLE
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</source>
 +
 
 +
Firebird:
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<source lang="sql">
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select first 10 COLUMNS
 +
from TABLE
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</source>
 +
 
 +
 
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[[category:remember]]
 +
[[category:Oracle]]

Current revision

ANSI joins in Oracle

Presentation about the ANSI syntax introduced in Oracle 9i

inner join

SELECT ...
FROM emp
JOIN dept ON emp.deptno = dept.deptno

left outer join

SELECT ...
FROM emp
LEFT OUTER JOIN dept ON emp.deptno = dept.deptno

right outer join

SELECT ...
FROM emp
RIGHT OUTER JOIN dept ON emp.deptno = dept.deptno

full join

SELECT ...
FROM emp
FULL JOIN dept ON emp.deptno = dept.deptno

cross join

SELECT ...
FROM emp
CROSS JOIN dept

traditional Oracle outer join syntax

inner join

SELECT ...
FROM emp, dept
WHERE emp.deptno = dept.deptno

left outer join

SELECT ...
FROM emp, dept
WHERE emp.deptno(+) = dept.deptno

right outer join

SELECT ...
FROM emp, dept
WHERE emp.deptno = dept.deptno(+)

TOP n SELECT

MySQL:

SELECT EMPNO, ENAME, JOB, MGR, SQL
FROM   EMP
LIMIT 10 offset 20

Oracle >= 8.1.6:

SELECT * FROM (SELECT 
    EMPNO, ENAME, JOB, MGR, SQL,
    rank() over(partition BY JOB ORDER BY HIRE_DATE DESC 
) RN
FROM EMP
) 
WHERE RN BETWEEN 20 AND 30
 
SELECT EMPNO, ENAME, JOB, MGR, SAL,
    rank() over
      (ORDER BY SAL DESC NULLS LAST) AS RANK,
    dense_rank() over
      (ORDER BY SAL DESC NULLS LAST) AS DRANK
FROM EMP
ORDER BY SAL DESC NULLS last;

MS SQL Server:

SELECT top 10 EMPNO, ENAME, JOB, MGR 
FROM EMP

Sybase:

SET rowcount 10
SELECT COLUMNS
FROM TABLE

Firebird:

SELECT first 10 COLUMNS
FROM TABLE
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