是否可以在没有手动 INSERT 语句的情况下使用生成的数据生成表？

Question

是否可以在SQL Server 2008中使用SQLCMD创建表并生成数据并插入表中，而无需手动INSERT为每一行键入语句？

例子：

假设有 10 周（1、2、3 ... 10）和 2 个时间点（上午 11 点、下午 12 点）和 5 个场地（房间 1、房间 2 ... 房间 5）。因此总共会有 10 x 2 x 5 = 100 行。

那么，在给定 3 个数据参数（周、时间和地点）的情况下，是否有可能生成这 100 行的 SQL 语句？

+--------------------------------+
| Week    |   Time   |   Venue   |
+--------------------------------+
| 1       |  11 am   |  Room 1   |
| 1       |  12 pm   |  Room 1   |
| 1       |  11 am   |  Room 1   |
|                                |
| 10      |  12 pm   |  Room 5   |
+--------------------------------+

Answer 1

您可以使用 3 个 CTE 表达式来生成数据，然后将它们进行笛卡尔积。

测试表：

create table calendar
(
week integer,
time varchar(20),
venue varchar(20)
);

周数：

SELECT 1 AS n
UNION ALL
SELECT n + 1 FROM weeks WHERE n < 10;

场地：

SELECT 1 AS v
UNION ALL
SELECT v+1 FROM venues WHERE v < 5;

次数：

SELECT '11 am' AS t
UNION
SELECT '12 pm' AS t;

将它们放在一起以进行测试查询：

WITH weeks
AS (
SELECT 1 AS n
UNION ALL
SELECT n + 1 FROM weeks WHERE n < 10
),
venues AS (
SELECT 1 AS v
UNION ALL
SELECT v+1 FROM venues WHERE v < 5
),
times AS (
  SELECT '11 am' AS t
  UNION
  SELECT '12 pm' AS t
)
SELECT n as week, t as time, 'Room '+CAST(v AS VARCHAR) as venue
FROM weeks, venues,times
;

转换为INSERT语句：

WITH weeks
AS (
SELECT 1 AS n
UNION ALL
SELECT n + 1 FROM weeks WHERE n < 10
),
venues AS (
SELECT 1 AS v
UNION ALL
SELECT v+1 FROM venues WHERE v < 5
),
times AS (
  SELECT '11 am' AS t
  UNION
  SELECT '12 pm' AS t
)
INSERT INTO calendar (week, time, venue)
SELECT n as week, t as time, 'Room '+CAST(v AS VARCHAR) as venue
FROM weeks, venues,times
;