Question

我正在尝试使用WITH子句创建持久表，但是，我收到了一个错误。

对于上下文，我目前找到的答案是

CREATE TABLE my_table
AS 
WITH my_tables_data AS ( 
   SELECT another_table.data1 AS some_value 
   FROM another_table
) 
SELECT * 
FROM some_data;

然而，我收到错误

消息319，级别15，状态1，行5关键字附近的语法不正确 “用”。如果此语句是公用表表达式，则为 xmlnamespaces子句或更改跟踪上下文子句，前一个声明必须以分号结束。

我的代码是

CREATE TABLE SalesOrdersPerYear  
WITH t1 AS (
    -- Define the CTE expression name and column list.  
    WITH Sales_CTE (SalesPersonID, BaseSalary)  
    AS  
    -- Define the CTE query.  
    (  
        SELECT SALES_PERSON.SALES_PERSON_ID, SALES_PERSON.BASE_SALARY  
        FROM SALES_PERSON  
        WHERE SALES_PERSON_ID IS NOT NULL  
    )  
    -- Define the outer query referencing the CTE name.  
    SELECT SalesPersonID, BaseSalary AS TotalSales  
    FROM Sales_CTE   
    ORDER BY SalesPersonID, BaseSalary;  
)

有人能够就此提供一些指导吗？

非常感谢提前！

Answer 1

这不是sql server的有效语法。您可以使用CREATE TABLE创建表并指定列名称和类型，也可以执行包含数据的SELECT INTO语句。

方法1：创建表格，然后填充：

CREATE TABLE SalesOrdersPerYear 
( SalesPersonID int, BaseSalary float)
;

WITH Sales_CTE (SalesPersonID, BaseSalary)  
AS  
(  
    SELECT SALES_PERSON.SALES_PERSON_ID, SALES_PERSON.BASE_SALARY  
    FROM SALES_PERSON  
    WHERE SALES_PERSON_ID IS NOT NULL 
)  
insert into SalesOrdersPerYear  
SELECT SalesPersonID, BaseSalary AS TotalSales  
FROM Sales_CTE   
ORDER BY SalesPersonID, BaseSalary;

方法2 - 一步到位

WITH Sales_CTE (SalesPersonID, BaseSalary)  
AS  
(  
    SELECT SALES_PERSON.SALES_PERSON_ID, SALES_PERSON.BASE_SALARY  
    FROM SALES_PERSON  
    WHERE SALES_PERSON_ID IS NOT NULL 
)  
select  SalesPersonID, BaseSalary AS TotalSales  
into SalesOrdersPerYear
FROM Sales_CTE   
ORDER BY SalesPersonID, BaseSalary;

当您需要指定有关表的更多信息时，请使用方法1（主键，索引，外键等。

对于更临时的事情，使用方法2。（你通常会在这里使用临时表，例如#SalesOrdersPerYear。）

无论哪种方式，数据现在都存储在您的表中，您可以再次使用它。

使用临时表：

-- Check for existence and drop first to avoid errors if it already exists.
if OBJECT_ID('tempdb..#SalesOrdersPerYear') is not null
    drop table #SalesOrdersPerYear

WITH Sales_CTE (SalesPersonID, BaseSalary)  
AS  
(  
    SELECT SALES_PERSON.SALES_PERSON_ID, SALES_PERSON.BASE_SALARY  
    FROM SALES_PERSON  
    WHERE SALES_PERSON_ID IS NOT NULL 
)  
select  SalesPersonID, BaseSalary AS TotalSales  
into #SalesOrdersPerYear
FROM Sales_CTE   
ORDER BY SalesPersonID, BaseSalary;

您还可以将其定义为表变量，这是方法之间的交叉点：

declare @SalesOrdersPerYear table
( SalesPersonID int, BaseSalary float)
;

WITH Sales_CTE (SalesPersonID, BaseSalary)  
AS  
(  
    SELECT SALES_PERSON.SALES_PERSON_ID, SALES_PERSON.BASE_SALARY  
    FROM SALES_PERSON  
    WHERE SALES_PERSON_ID IS NOT NULL 
)  
insert into @SalesOrdersPerYear  
SELECT SalesPersonID, BaseSalary AS TotalSales  
FROM Sales_CTE   
ORDER BY SalesPersonID, BaseSalary;

此选项仅在此批次中保留，并且不需要删除 - 就像任何其他变量一样。

Answer 2

CREATE VIEW AS my_view
AS 
WITH my_tables_data AS ( 
   SELECT another_table.data1 AS some_value 
   FROM another_table
) 

SELECT * 
FROM some_data; 

CREATE TABLE my_table AS 
SELECT * FROM my_view;

如何在SQL中使用“With”子句创建表

2 个答案: