The variant data type can contain the following C/AL data types: Action Automation BigInteger BigText Boolean Byte Char Code Codeunit Date DateFormula DateTime Decimal Duration GUID InStream Integer Option OutStream Record RecordRef Text Time ...
Visual FoxPro and XML Schema Data Type Mapping Character Data Type Currency Data Type Date Data Type DateTime Data Type Double Field Type Float Field Type General Field Type Integer Field Type Logical Data Type Memo Field Type Numeric Data Type Variant Data Type Data Manipulation Data Storage Conta...
The Variant data type is the data type for all variables that are not explicitly declared as some other type (using statements such as Dim, Private, Public, or Static). The Variant data type has no type-declaration character. A Variant is a special data type that can contain any kind of...
VBA数据类型Variant 官方文档定义:A special data type that can contain numeric, string, or date data as well as user-defined types and the special values Empty and Null. The Variant data type has a numeric storage size of 16 bytes and can contain data up to the range of a Decimal, or a...
Type/Name Size of Data Range 0 (Empty) 0 N/A 1 Null 0 N/A 2 Integer 2 bytes (short) -32768 to 32767 3 Long 4 bytes (long) -2.147E9 to 2.147E9 4 Single 4 bytes (float) -3.402E38 to -1.401E-45 (negative) 1.401E-45 to 3.402E38 (positive) 5 Double 8 bytes (double) -1.79...
Gets a data type that specifies the Variant definition used in the data type. 命名空間: Microsoft.SqlServer.Management.Smo 組件: Microsoft.SqlServer.Smo (在 Microsoft.SqlServer.Smo.dll 中) 語法 C# 複製 public static DataType Variant { get; } 屬性值 型別:Microsoft.SqlServer.Management.Smo. ...
union Message { int int_value; float float_value; char *str_value; // 此处用个指针代替,这样可以存储更多数据到堆中 }; // 定义一个承载Message的类型,可以区分不同的枚举数据 struct DataMessage { DataType type; // 这个data的数据类型 union Message msg; // 具备多种类型存储的能力 }; // ...
官方文档定义:A special data type that can contain numeric, string, or date data as well as user-defined types and the special values Empty and Null. The Variant data type has a numeric storage size of 16 bytes and can contain data up to the range of a Decimal, or a character storage...
You started a new job and you are assigned to maintain an existing database application. When you look at the SQL code, you find that the application uses the sql_variant data type in variables and table columns. What is this data type and when should it be used?