在SQL Server 2005中提供了Cross apply使表可以和表值函数(table-valued functions TVF‘s)结果进行join查询。例如,现在我们想通过函数的结果值和表Student进行查询,这时我们可以使用Cross apply进行查询: --- Creates a function to get data from Apply base on sID. CREATE FUNCTION dbo.fn_Apply(@sID int) R...
自定义函数(User-Defined Function)有两种,一种是标量UDF(Scalar-valued Functions)和表值UDF(Table-valued Functions),前者只返回单个数据值,而后者则返回一个表。前面演示了标量自定义函数,javascript:void(0),现在下面两个实例均演示表值自定义函数, 代码 SETANSI_NULLSON GO SETQUOTED_IDENTIFIERON GO CREATEFUN...
Table Update是一个物理运算符。 Table-valued FunctionTable-valued Function运算符计算表值函数(Transact-SQL 或 CLR)并将结果行存储在tempdb数据库中。 当父迭代器请求这些行时,Table-valued Function将返回tempdb中的行。 调用表值函数的查询生成具有Table-valued Function迭代器的查询计划。 可以使用不同的参数...
1、table-valued function can join table, but Scalar-valued functions can not join table. SELECT*FROMTestCount(5) A,TestCount_1 BWHEREA.ID=B.ID 2、table-valued function can not nest in table, but Scalar-valued functions can do it. SELECTDBO.TestCount_SVF(5),*FROMTestCount_1 3、call ...
create table Apply(sID int, cName nvarchar(50), major nvarchar(50), decision text); 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Inner join 内联接(Inner join)是最常用的联接类型之一,它查询满足联接谓词的数据。 假设我们要查询申请表Apply中申请学校的相关信息,由于Apply表中包含学校名字我们并不...
Learn more about the Microsoft.SqlServer.TransactSql.ScriptDom.JoinTableReference.JoinTableReference in the Microsoft.SqlServer.TransactSql.ScriptDom namespace.
SELECT * FROM func(); SELECT * FROM tbl INNER JOIN func() AS f ON tbl.col = f.col; SELECT * FROM tbl AS t CROSS APPLY func(t.col); Table-valued functions can return a table when: Created from scalar input arguments. For example, a table-valued function that takes a comma-deli...
SQ = 服务队列TA = 程序集 (CLR) DML 触发器TF = SQL table-valued-functionTR = SQL DML 触发器TT = 表类型UQ = UNIQUE 约束X = 扩展存储过程适用于:SQL Server 2014 (12.x) 及更高版本、Azure SQL Database、Azure Synapse Analytics、Analytics Platform System (PDW) 。ST = STATS_TREE适用于:...
] parameter_data_type [ NULL ] [ = default ] } [ , ...n ] ) RETURNS { return_data_type } [ WITH <clr_function_option> [ , ...n ] ] [ AS ] EXTERNAL NAME <method_specifier> [ ; ] Syntax for CLR table-valued functions. syntaxsql 复制 CREATE [ OR ALTER ] FUNCTION [ ...
aggResolveAliases::ResolveSubquery:://解析AST中的字查询信息ResolveWindowOrder::ResolveWindowFrame::ResolveNaturalAndUsingJoin::ExtractWindowExpressions::GlobalAggregates:://解析全局的聚合函数,比如select sum(score) from tableResolveAggregateFunctions::TimeWindowing::ResolveInlineTables::TypeCoercion.type...