SUM是一个求和函数,返回指定列值的总和。SUM 只能用于数字列。其中忽略 Null 值。 语法 SUM([ALL | DISTINCT]expression )OVER([partition_by_clause]order_by_clause ) 示例 SELECTSUM([UnitsInStock])FROM[dbo].[Product] SELECTSUM(DISTINCT([UnitsInStock]))FROM[dbo].[Product] SUM可以与GROUP BY一起使...
3.1 未使用 PARTITION BY select*,sum(U_Id)over(orderbyU_Id) 列1,sum(U_Id)over(orderbyU_Id RANGEBETWEENUNBOUNDED PRECEDINGANDCURRENTROW) 列2,sum(U_Id)over(orderbyU_Id ROWSBETWEENUNBOUNDED PRECEDINGANDCURRENTROW) 列3,sum(U_Id)over(orderbyU_Id ROWSBETWEEN1PRECEDINGAND2FOLLOWING) 列4,sum(...
-- Aggregate Function SyntaxSUM( [ALL|DISTINCT] expression )-- Analytic Function SyntaxSUM( [ALL] expression)OVER( [partition_by_clause]order_by_clause) 参数 ALL 向所有值应用此聚合函数。 ALL 为默认值。 DISTINCT 指定SUM 返回唯一值的总和。
SUM(d) OVER (ORDER BY i) AS 全局内至本行累计和, SUM(d) OVER (PARTITION BY a.group_no ORDER BY i) AS 组内至本行累计和, SUM(d) OVER (PARTITION BY a.group_no) AS 组内和, AVG(1.0*d) OVER (ORDER BY i) AS 全局内至本行移动平均, AVG(1.0*d) OVER (PARTITION BY a.group_no ...
适用范围:SQL Server(SQL Server 2008 至当前版本),Windows Azure SQL Database(初始版本至当前版本)。 Transact-SQL 语法约定 语法 复制 OVER ( [ <PARTITION BY clause> ] [ <ORDER BY clause> ] [ <ROW or RANGE clause> ] ) <PARTITION BY clause> ::= PARTITION BY value_expression , ... [ ...
SQL Server、Azure SQL 資料庫 和 Azure Synapse Analytics 的語法。syntaxsql 複製 OVER ( [ <PARTITION BY clause> ] [ <ORDER BY clause> ] [ <ROW or RANGE clause> ] ) <PARTITION BY clause> ::= PARTITION BY value_expression , ... [ n ] <ORDER BY clause> ::= ORDER BY order_by...
(VARCHAR(20),AVG(SalesYTD)OVER(PARTITIONBYTerritoryIDORDERBYDATEPART(yy,ModifiedDate) ),1)ASMovingAvg ,CONVERT(VARCHAR(20),SUM(SalesYTD)OVER(PARTITIONBYTerritoryIDORDERBYDATEPART(yy,ModifiedDate) ),1)ASCumulativeTotalFROMSales.SalesPersonWHERETerritoryIDISNULLORTerritoryID <5ORDERBYTerritoryID,Sales...
The SQL Server lock performance counters display information about memory used by partitioned and non-partitioned locks. A transaction is assigned to a partition when the transaction starts. For the transaction, all lock requests that can be partitioned use the partition assigned to that transactio...
Syntax for SQL Server, Azure SQL Database, and Azure Synapse Analytics. syntaxsql Copy OVER ( [ <PARTITION BY clause> ] [ <ORDER BY clause> ] [ <ROW or RANGE clause> ] ) <PARTITION BY clause> ::= PARTITION BY value_expression , ... [ n ] <ORDER BY clause> ::= ORDER BY ...
检查当前主副本上 SQL Server 错误日志中数据库的运行状况。 如果数据库正常,请再次尝试该操作。 19525 16 否 无法在数据库 “%.*ls.” 的辅助副本上创建数据库备份。 无法清除差异位图,检查点无法在主副本上运行。 检查当前主副本上 SQL Server 错误日志中数据库的运行状况。...