UNPIVOT子句中的列标识符需遵循目录排序规则。 对于Azure SQL 数据库,排序规则始终SQL_Latin1_General_CP1_CI_AS为 。 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。
SQL Unpivot: Converting Columns to Rows The UNPIVOT operator in SQL is used to perform the opposite operation of PIVOT. It rotates columnar data into row-level data, essentially converting multiple columns into rows. This can be helpful when you need to normalize data or restructure your data f...
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)首頁即可下載。
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Sets Transact-SQL and query processing behaviors to be compatible with the specified version of the SQL engine. For other ALTER DATABASE options, see ALTER DATABASE. For more information about the syntax co...
Basic - select with fixed values - invert columns to rows Basic CTE query, get full path of something recursive BCP Error - Copy direction must be either 'in', 'out' or 'format'. BCP Export to csv using UTF-8 or UTF-16 BCP Issue when using a format file and excluding columns. BCP...
To meet this restriction, you can provide the UNPIVOT operator with a table expression that converts the three columns to the same data type. The sql_variant data type is a good candidate because you can convert the different source columns to the same data type and still retain their ...
To meet this restriction, you can provide the UNPIVOT operator with a table expression that converts the three columns to the same data type. The sql_variant data type is a good candidate because you can convert the different source columns to the same data type and still retain their ...
10087 16 No The provider did not release some of the existing rows. 10088 16 No The order of the columns was not specified in the object that created the rowset. The provider had to reexecute the command to reposition the next fetch position to its initial position, a...
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Sets Transact-SQL and query processing behaviors to be compatible with the specified version of the SQL engine. For other ALTER DATABASE options, seeALTER DATABASE. For more information about the syntax conventions, seeTransact-...
The same sequence number is returned for all columns in a row if multiple default constraints use the same sequence object, or if the same sequence object is used both in the statement supplying the values, and in a default constraint being executed. References to the NEXT VALUE FOR function...