A derived type can be cast to any type that is its ancestor in the type hierarchy, all the way up to its built-in primitive base type. For example, you can cast fromxs:tokentoxs:normalizedStringor toxs:string. A derived type can be cast to a primitive type if its primitive ancestor...
在SQL Server 中,在 之後 AtomicType需要問號 (?)。 例如,如下列查詢所示, "2" cast as xs:integer? 將字串值轉換成整數: 複製 declare @x xml set @x='' select @x.query('"2" cast as xs:integer?') 在下列查詢中, data() 會傳回 ProductModelID 屬性的具型別值,這是字串類型。 運算子...
SQL Server Data Type Conversion Chart.png File Size: 43.7 KB Illustrates all explicit and implicit data type conversions that are allowed for SQL Server system-supplied data types. Implicit conversions are those conversions that occur without specifying either the CAST or CONVERT function. Explicit co...
A value of a union type requiring an implicit cast prevents lookup of secondary XML indexes for the value, although secondary XML indexes may be used for matching paths. Thus, it prevents range scans from occurring on the VALUE secondary XML index. For more information, see Range Conditions ...
[<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted to variables of type Object. [ODBC Driver Manager] Data source name not found and no default driver specified [ODBC SQL Server Driver] Invalid Parameter...
nchar varchar, including varchar(max) char varbinary, including varbinary(max) binary (lowest) Related content Data types (Transact-SQL) Expressions (Transact-SQL) CAST and CONVERT (Transact-SQL)Feedback Was this page helpful? Yes No Provide product feedback | Get help at Microsoft Q&A Englis...
Use CONVERT instead of CAST to take advantage of the style functionality in CONVERT. The following illustration shows all explicit and implicit data type conversions that are allowed for SQL Server system-supplied data types. These include xml, bigint, and sql_variant. There is no implicit ...
BuiltInFunctionTableReference BulkInsertBase BulkInsertOption BulkInsertOptionKind BulkInsertStatement BulkOpenRowset CallTarget CaseExpression CastCall CatalogCollation CatalogCollationOption CellsPerObjectSpatialIndexOption CertificateCreateLoginSource CertificateOption CertificateOptionKinds CertificateStatementBase Cha...
XML schema constraints may determine the insertion point, and inserting the new node in the rightmost permissible position yields the best performance. Optimizations Prevented by Union of Types A value of a union type requiring an implicit cast prevents lookup of secondary XML indexes for the value...
SELECT CAST('01/01/2100' AS SMALLDATETIME) Msg 242, Level 16, State 3, Line 1 The conversion of a varchar data type to a smalldatetime data type resulted in an out-of-range value. Solution / Work Around To avoid this error, make sure that the character string containing the date/time...