syntaxsql 複製 CAST ( expression AS data_type [ ( length ) ] ) CONVERT 語法:syntaxsql 複製 CONVERT ( data_type [ ( length ) ] , expression [ , style ] ) Transact-SQL 語法慣例引數expression任何有效的運算式。data_type目標資料類型。 這包括 xml、bigint 和sql_variant。 無法使用別名...
Syntax for CAST: CAST ( expression AS data_type [ ( length ) ] ) Syntax for CONVERT: CONVERT ( data_type [ ( length ) ] , expression [ , style ] ) 参数 expression 任何有效的表达式。 data_type 目标数据类型。 这包括 xml、bigint 和 sql_variant。 不能使用别名数据类型。
ANDtype='trad_cook' 下面是结果集: Title ytd_sales --- --- Fifty Years in Buckingham Palace Kitchens 15096 (1 row(s) affected) SQL Server自动处理某些数据类型的转换。例如,如果比较char和datetime表达式、smallint和int表达式、或不同长度的char表达式,SQL Server 可将它们自动转换。这种转换称为隐性转换...
SQL String Functions > CAST Function The CAST function in SQL converts data from one data type to another. For example, we can use the CAST function to convert numeric data into character string data. SyntaxThe syntax of the CAST function is as follows: ...
and passing the resulting string to the input function of the target data type. In many common cases, this feature avoids the need to write a separate cast function for conversion. An I/O conversion cast acts the same as a regular function-based cast; only the implementation is different. ...
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Returns expression, translated to data_type.Date and time stylesFor a date or time data type expression, style can have one of the values shown in the following table. Other values are processed as 0. Beginning with SQL Server 2012 (11.x), the only styles supported, when converting from ...
pg_catalog|date_in|date|cstring|normal pg_catalog|date_out|cstring|date|normal Youcan define a castasan I/O conversion castbyusingthe WITH INOUT syntax. AnI/O conversion castisperformedbyinvoking the outputfunctionof the source data type, ...
CONVERT (data_type[(length)], expression [, style]) 参数 expression 是任何有效的 Microsoft® SQL Server™ 表达式。有关更多信息,请参见表达式。 data_type 目标系统所提供的数据类型,包括 bigint 和 sql_variant。不能使用用户定义的数据类型。有关可用的数据类型的更多信息,请参见数据类型。
TYPE_ID (Transact-SQL) TYPE_NAME (Transact-SQL) TYPEPROPERTY (Transact-SQL) UNICODE (Transact-SQL) UNION (Transact-SQL) uniqueidentifier (Transact-SQL) UPDATE (Transact-SQL) UPDATE() (Transact-SQL) UPDATE STATISTICS (Transact-SQL) UPDATETEXT (Transact-SQL) ...