在單一 T-SQL 語句內重複使用PIVOT/UNPIVOT可能會對查詢效能造成負面影響。 本文Transact-SQL 程式碼範例使用AdventureWorks2022或AdventureWorksDW2022範例資料庫,從Microsoft SQL Server Samples 和 Community Projects(Microsoft SQL Server 範例和社群專案)首
对于SQL Server 部分包含的数据库,排序规则始终是Latin1_General_100_CI_AS_KS_WS_SC。 如果将该列与与其他列合并,则需要 collate 子句 (COLLATE DATABASE_DEFAULT) 以避免冲突。 在Microsoft Fabric 和 Azure Synapse Analytics 池中,如果GROUP BY存在非pivot 列输出,PIVOT则PIVOT具有运算符的查询将失败。 解决...
In this example, we have pivoted the Quantity and Revenue columns using the SUM aggregation function. We’ve also created an additional derived column Revenue_Region to differentiate between the revenue columns for each region. Finally, we used two separate PIVOT operators to pivot both the quantit...
PIVOT (Sales FOR CYear -- Use of the SQL pivot operator IN ([2010], [2011], [2012], [2013], [2014])) AS P; But, as mentioned, it is easy to change it to a query that does work, the query that just transposes the data, without aggregation. Or, to be precise, the aggregat...
Using the table from the previous example, this code runs a GROUP BY ROLLUP operation instead of a simple GROUP BY. SQL SELECTCountry, Region,SUM(Sales)ASTotalSalesFROMSalesGROUPBYROLLUP(Country, Region); The query result has the same aggregations as the simple GROUP BY without the ROLLUP. In...
每个单元格中的值是使用aggregation_expression的FILTER ( WHERE column_list IN (expression, ...)的结果。 示例 SQL复制 -- A very basic PIVOT-- Given a table with sales by quarter, return a table that returns sales across quarters per year.>CREATETEMPVIEWsales(year,quarter, region, sales)ASVALU...
Stores full source/target server version in the project metadata (requires project upgrade) Use DBA data dictionaries for objects discovery when possible Fix multiple parsers issues (PIVOT/UNPIVOT,MERGE, alternative quoting) Fix conversion ofINSERTING/DELETING/UPDATINGspecial functions in triggers ...
Columnstore Indexes in SQL Server 2012 据说列式索引采用了独特的压缩方式。这种压缩方式叫xVelocity(前称VertiPaq),专门用于 Analysis Service和Power Pivot的数据存储,现将其移到relational database storage engine中来。 1) ColumnStore index data Structure: 从物理存储上来说,ColumnStore index 在page之上加了一...
INVALID_WINDOW_SPEC_FOR_AGGREGATION_FUNC、LOCAL_MUST_WITH_SCHEMA_FILE、MERGE_WITHOUT_WHEN、MIGRATION_NOT_SUPPORTED、MISSING_CLAUSES_FOR_OPERATION、MV_ST_ALTER_QUERY_INCORRECT_BACKING_TYPE、NOT_ALLOWED_IN_FROM、NOT_ALLOWED_IN_PIPE_OPERATOR_WHERE、NOT_A_CONSTANT_STRING、NOT_UNRESOLVED_ENCODER、PARSE_...
Power Pivot for SharePoint Replicated Databases SQL Server Management Tools Installation Wizard (Setup) Upgrade edition Upgrade Database Engine Overview Choose a method Query Tuning Assistant Plan & test the upgrade plan Complete the upgrade Change the database compatibility mode & use th...