syntaxsql 复制 <order_clause> ::= { <column_name_in_clr_table_type_definition> [ ASC | DESC ] } [ , ...n ] <method_specifier> ::= assembly_name.class_name.method_name <clr_function_option> ::= { [ RETURNS NULL O
为什么会有这种情况,这是因为SQL语句里面调用用户定义标量函数(UDF Scalar Function),都是逐行调用用户定义函数,这样需要为每行去提取用户定义函数的定义,然后去执行这些定义,从而导致了性能问题;更深层次的原因是因为函数采用了过程式的处理方法,而SQL Server查询数据则是基于数据集合的,这样在采用过程式的逐行处理时,S...
SyntaxSIN(number)Parameter ValuesParameterDescription number Required. A numeric valueTechnical DetailsWorks in: SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data WarehouseMore ExamplesExample Return the sine of a number: SELECT SIN(-1); Try it Yourself...
Syntax Hinweise Beispiele Weitere Informationen Gilt für: SQL Server Wie im Thema beschrieben, können Sie die Sql:column(()-Funktion verwenden, wenn Sie XML-Datentypmethoden verwenden, um einen relationalen Wert in XQuery verfügbar zu machen. Beispielsweise wird die Query()-Methode ...
Змістстатті Syntax Arguments Return Types Remarks Показатище 2 Applies to: SQL Server Azure SQL Managed InstanceIs used only in a SELECT statement with an INTO table clause to insert an identity column into a new table. Although similar, the IDENTITY ...
Transact-SQL 语法约定 语法 syntaxsql CREATEPARTITIONFUNCTIONpartition_function_name(input_parameter_type)ASRANGE[LEFT|RIGHT]FORVALUES( [boundary_value[ ,...n ] ] ) [ ; ] 参数 partition_function_name 是分区函数的名称。 分区函数名称在数据库内必须唯一,并且符合标识符规则。
In this article Syntax Arguments Best practices Data types Show 7 more Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Creates a user-defined function (UDF), which is a Transact-SQL or common language runtime (CLR) routine. A user-defined function accepts parameters...
In this article Syntax Arguments Returns Diagnostics Show 8 more Conformance Version Introduced: ODBC 3.0 Standards Compliance: ISO 92 Summary SQLFreeHandle frees resources associated with a specific environment, connection, statement, or descriptor handle. Note This function is a generic function ...
The QUOTENAME() function returns a Unicode string with delimiters added to make the string a valid SQL Server delimited identifier. Syntax QUOTENAME(string, quote_char) Parameter Values ParameterDescription stringRequired. A string of Unicode character data. Limited to 128 characters ...
Syntax Arguments Return Types Remarks Show 2 more Applies to: SQL Server Azure SQL Managed InstanceIs used only in a SELECT statement with an INTO table clause to insert an identity column into a new table. Although similar, the IDENTITY function is not the IDENTITY property that is use...