[SQL]存取各種資料庫前十筆的語法

存取各種資料庫前十筆的語法
1. ORACLE
SELECT * FROM TABLE1 WHERE ROWNUM<=N

2. INFORMIX
SELECT FIRST N * FROM TABLE1 where 1=1

3. DB2
SELECT * ROW_NUMBER() OVER(ORDER BY COL1 DESC) AS ROWNUM WHERE ROWNUM<=N
或者
SELECT COLUMN FROM TABLE where 1=1 FETCH FIRST N ROWS ONLY

4. SQL SERVER
SELECT TOP N * FROM TABLE1 where 1=1
or
SET ROWCOUNT N SELECT * FROM TABLE1 where 1=1 SET ROWCOUNT N1

5. SYBASE
SET ROWCOUNT N SELECT * FROM TABLE1 where 1=1 SET ROWCOUNT N1

6. MYSQL
SELECT * FROM TABLE1 where 1=1 LIMIT N

7. FOXPRO
SELECT * TOP N FROM TABLE ORDER BY COLUMN

8. ACCESS
SELECT TOP N * FROM TABLE1

[INFORMIX] 日期轉民國年


SELECT substr(CAST(1000+YEAR(reportdate)-1911 AS CHAR(4)),-3),
substr(CAST(100+MONTH(reportdate) AS CHAR(3)),-2) ,
substr(CAST(100+DAY(reportdate) AS CHAR(3)),-2),

substr(CAST(1000+YEAR(reportdate)-1911 AS CHAR(4)),-3) ||
substr(CAST(100+MONTH(reportdate) AS CHAR(3)),-2) ||
substr(CAST(100+DAY(reportdate) AS CHAR(3)),-2)
FROM Totfa
WHERE ReportMonth = 10102

結果:

(expression) (expression)_1 (expression)_2 (expression)_3

101 03 05 1010305