SQL

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traditional Oracle outer join syntax

left outer join

 


right outer join

 


inner join

 


TOP SELECT

MySQL:

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

Oracle >= 8.1.6:

SELECT * FROM (SELECT 
JOB_NUM, 
JOB_NME, 
START_DT_GMT, 
STATUS_CD, 
rank() over(partition BY JOB_NUM ORDER BY START_DT_GMT DESC 
) rn 
FROM NM_SCHD_JOB_RUN 
) 
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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