DB2的一个选项:

SELECT 101 AS C1, 102 AS C2 FROM SYSIBM.SYSDUMMY1 UNION ALL
SELECT 201 AS C1, 202 AS C2 FROM SYSIBM.SYSDUMMY1 UNION ALL
SELECT 301 AS C1, 302 AS C2 FROM SYSIBM.SYSDUMMY1

SELECT * 
FROM DUAL 
CONNECT BY ROWNUM <= 9;

在PostgreSQL中，你可以做:

SELECT  *
FROM    (
        VALUES
        (1, 2),
        (3, 4)
        ) AS q (col1, col2)

在其他系统中，只需使用UNION ALL:

SELECT  1 AS col1, 2 AS col2
-- FROM    dual
-- uncomment the line above if in Oracle
UNION ALL
SELECT  3 AS col1, 3 AS col2
-- FROM    dual
-- uncomment the line above if in Oracle

在Oracle, SQL Server和PostgreSQL中，您还可以生成任意行数的记录集(可通过外部变量提供):

SELECT  level
FROM    dual
CONNECT BY
        level <= :n

在Oracle中,

WITH    q (l) AS
        (
        SELECT  1
        UNION ALL
        SELECT  l + 1
        FROM    q
        WHERE   l < @n
        )
SELECT  l
FROM    q
-- OPTION (MAXRECURSION 0)
-- uncomment line above if @n >= 100

在SQL Server中，

SELECT  l
FROM    generate_series(1, $n) l

在PostgreSQL。

SELECT 1, 2, 3
UNION ALL SELECT 4, 5, 6
UNION ALL SELECT 7, 8, 9

试试oracle中的connect by子句，就像这样

select level,level+1,level+2 from dual connect by level <=3;

有关connect by子句的更多信息，请参见此链接:已删除URL，因为oraclebin站点现在是恶意的。

对于Microsoft SQL Server或PostgreSQL，您可能想要尝试此语法

SELECT constants FROM (VALUES ('foo@gmail.com')， ('bar@gmail.com')， ('baz@gmail.com')) AS MyTable(常量)

你也可以在这里查看一个SQL Fiddle: http://www.sqlfiddle.com/#!17/9eecb / 34703/0