sql - MS SQL 如何从表中选择 n 行，即使表有 n - x 行

Question

我有一个包含以下数据的表格:

ID | Name
---------
1  | John
2  | Alice

当我想选择 5 行时，我想获取下一个数据:

ID | Name
---------
1  | John
2  | Alice
1  | John
2  | Alice
1  | John

有什么想法可以做到这一点吗？

Answer 1

-- to create a sample table.
CREATE TABLE table1 (ID BIGINT, NAME VARCHAR(255))
INSERT INTO table1 VALUES (1, 'John'), (2, 'Alice')

-- set number of rows you need
DECLARE @RowsReqd INT = 5  

-- find out the max ID we want to generate 
DECLARE @Limit INT
SELECT @Limit = MAX(ID) FROM table1

-- generate the list
;WITH NumbersList
AS (
    SELECT 1 AS Number, 1 AS ID
    UNION ALL
    SELECT Number + 1, Number % @Limit + 1 FROM NumbersList
    WHERE Number < @RowsReqd    
    )
SELECT T.*
FROM NumbersList NL
INNER JOIN table1 T ON T.ID = NL.ID
ORDER BY NL.Number
OPTION (MAXRECURSION 10000) -- increase this value to generate more numbers

输出:

ID   NAME
1    John
2    Alice
1    John
2    Alice
1    John