SQL 复制 -- Create the table and insert values as portrayed in the previous example. CREATE TABLE pvt ( VendorID INT, Emp1 INT, Emp2 INT, Emp3 INT, Emp4 INT, Emp5 INT); GO INSERT INTO pvt VALUES (1, 4, 3, 5, 4, 4); INSERT INTO pvt VALUES (2, 4, 1, 5, 5, 5); ...
(<SELECT query that produces the data>)AS<alias for the source query>PIVOT(<aggregation function>(<column being aggregated>)FOR<column that contains the values that become column headers>IN(<first pivoted column>,<second pivoted column>, ...<last pivoted column>) )AS<alias for the pivot ...
1.数据准备 --Create the table and insert values as portrayed in the previous example.CREATETABLEpvt (VendorIDint, Emp1int, Emp2int, Emp3int, Emp4int, Emp5int);GOINSERTINTOpvtVALUES(1,4,3,5,4,4);INSERTINTOpvtVALUES(2,4,1,5,5,5);INSERTINTOpvtVALUES(3,4,3,5,4,4);INSERTINTOpv...
(<SELECT query that produces the data>)AS<alias for the source query>PIVOT(<aggregation function>(<column being aggregated>)FOR<column that contains the values that become column headers>IN(<first pivoted column>,<second pivoted column>, ...<last pivoted column>) )AS<alias for the pivot ...
Hopefully the example above will bring clarity for pivoting on two or more fields. It should be considered whether to transform the data in SQL Server or the client, as there are tradeoffs to each approach. The PIVOT function would likely have a performance impact on the query based on ...
从SQL中可以看出PIVOT有两个步骤 An aggregate function, which will aggregate if multiple values exist. In the initial SELECT statement that returns product data, there were many duplicate rows. This example uses SUM whenever this occurs, which will add up product quantities if there ...
big, you will not have a problem using them. The sorting process takes a lot of resources. An alternative is to use FOR XML PATH with the STUFF function. The following article, will provide you some tips about this topic:Using FOR XML PATH and STRING_AGG() to denormalize SQL Server ...
...用游标传递数据 利用游标 REF CURSOR 可将数据集(多行记录)传递到PL/SQL函数: SELECT * FROM TABLE (myfunction (CURSOR (SELECT * ...定义对象类型和基于对象类型的表类型 定义对象类型并且为进一步引用做好准备。...定义表类型:TYPE SUM_SALES_ROLL_T_TAB CREATE TYPE sum_sales_roll_t_tab AS ...
这意味着必须标识另外两个列。包含要旋转的列值(Emp1、Emp2...)的列将被称为 Employee,将保存当前位于待旋转列下的值的列被称为 Orders。这些列分别对应于 Transact-SQL 定义中的 pivot_column 和 value_column。以下为该查询。 --Create the table and insert values as portrayed in the previous example....
Este exemplo usa UNPIVOT em relação aos resultados dinâmicos criados a partir de Complex PIVOT Example acima.U-SQL Copiar @pivotedResults = EXTRACT VendorID int, Emp1 int, Emp2 int, Emp3 int, Emp4 int, Emp5 int FROM "/ReferenceGuide/DML/FROM/PIVOT/pivotComplex.txt" USING Extrac...