在SqlServer中

Question

我有一个查询来查找数字语句的演变，我在我的语句表中有。我使用以下查询来循环它

SELECT LAST_UPDATED_WEEK, SUM( NUM_STATEMENTS ) OVER (ORDER BY LAST_UPDATED_WEEK ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW ) AS "Number of account statements"
    FROM (
      SELECT DATEPART(wk, STATEMENT_CREATION_DATE) AS LAST_UPDATED_WEEK,
             COUNT(DISTINCT STATEMENT_ID) AS NUM_STATEMENTS
      FROM   STATEMENTS_TABLE
      GROUP BY DATEPART(wk, STATEMENT_CREATION_DATE)

此查询的目的是接收每周总数的语句，如下面的：

例如，在8月31日这一周，我有3个新陈述。在9月7日这一周，我有4个新的陈述，这使得陈述的数量为7.这对于我表中的每一条记录都是

但是当我运行查询时，我得到以下错误：

  

错误：'）'附近的语法不正确。   SQLState：S0001   ErrorCode：102

有什么问题？

Answer 1

在最后添加) AS t：

SELECT 
    LAST_UPDATED_WEEK, 
    SUM( NUM_STATEMENTS ) OVER (ORDER BY LAST_UPDATED_WEEK ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW ) AS 'Number of account statements'
FROM (
    SELECT DATEPART(wk, STATEMENT_CREATION_DATE) AS LAST_UPDATED_WEEK,
            COUNT(DISTINCT STATEMENT_ID) AS NUM_STATEMENTS
    FROM   STATEMENTS_TABLE
    GROUP BY DATEPART(wk, STATEMENT_CREATION_DATE)) AS t

Answer 2

您将order by与partition by混为一谈。 sum表达式应为：

SUM(NUM_STATEMENTS) OVER (PARTITION BY LAST_UPDATED_WEEK 
                          ROWS BETWEEN UNBOUNDED PRECEDING AND 
                                       CURRENT ROW ) AS 
"Number of account statements"