The CREATE FUNCTION statement allows to create a table-valued function (often referred to as TVF). Syntax Create_TV_Function_Statement := 'CREATE' 'FUNCTION' ['IF' 'NOT' 'EXISTS'] Identifier TVF_Signature ['AS'] 'BEGIN' TVF_Statement_List 'END'. Remarks This statement creat...
CREATEFUNCTION[dbo].[F_CM_Split](@textVARCHAR(MAX),@delimiterVARCHAR(1)='')RETURNS@StringsTABLE( ITEM_VALUEVARCHAR(MAX) )ASBEGINDECLARE@indexINTSET@index=-1WHILE(LEN(@text)>0)BEGINSET@index=CHARINDEX(@delimiter,@text)IF(@index=0)AND(LEN(@text)>0)BEGININSERTINTO@StringsVALUES(@text)BREAK...
CREATEFUNCTIONdbo.MyFunction(@MyTableMyTableType READONLY)RETURNSINTASBEGINDECLARE@CountINT;SELECT@Count=COUNT(*)FROM@MyTable;RETURN@Count;END; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 注释: CREATE FUNCTION用于定义一个新的函数。 dbo.MyFunction是函数的名称。 @MyTable MyTableType...
U-SQL table-valued functions Introduction to functions CREATE FUNCTION - table-valued function DROP FUNCTION U-SQL packages U-SQL procedures U-SQL assemblies U-SQL credential objects U-SQL data sources User-defined U-SQL types Data modification language (DML) statements ...
As the name suggests: table-valued returns table, however Scalar-valued returns a single value, such as a string, integer, or bit value. 1、table-valued function As to create table-valued function, there are 2 ways, look at the example below please, it’s suitable for simple logic: ...
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,
] 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 [ ...
[ OPERATION_TYPE_DESC_COLUMN_NAME = operation_type_desc_column_name ] } <table_stretch_options> ::= { [ FILTER_PREDICATE = { NULL | table_predicate_function } , ] MIGRATION_STATE = { OUTBOUND | INBOUND | PAUSED } } <index_option> ::= { PAD_INDEX = { ON | OFF } | FILLFACTOR...
Syntax for Transact-SQL inline table-valued functions. syntaxsql 複製 CREATE [ OR ALTER ] FUNCTION [ schema_name. ] function_name ( [ { @parameter_name [ AS ] [ type_schema_name. ] parameter_data_type [ NULL ] [ = default ] [ READONLY ] } [ , ...n ] ] ) RETURNS TABLE [...
表值函数(table-valued function, TVF),顾名思义就是指返回值是一张表的函数,在Oracle、SQL Server等数据库中屡见不鲜。 而在Flink的上一个稳定版本1.13中,社区通过FLIP-145提出了窗口表值函数(window TVF)的实现,用于替代旧版的窗口分组(grouped window)语法。