默认情况下,数字字段的设置为长整型。 长整型值存储大约 -20 亿到 +20 亿的整数。 或者,可以选择 Double 值来存储带小数的数字。 原因 出现此问题的原因是 dBase 中没有 Integer 数据类型。 dBase 使用 Numeric 或 Float 数据类型。 Access 将长整型映射到 dBase 中的数值数据类型。
adInteger 4 字节的带符号整型 (DBTYPE_I4)。 adIUnknown OLE 对象上 IUnknown 接口的指针 (DBTYPE_IUNKNOWN)。 adLongVarBinary 长二进制值(仅用于 Parameter 对象)。 adLongVarChar 长字符串值(仅用于 Parameter 对象)。 adLongVarWChar 以空结尾的长字符串值(仅用于 Parameter 对象)。 adNumeric 具有固定精...
MEMO LONGTEXT SQL_LONGVARCHAR[2] SQL_WLONGVARCHAR[3] NUMBER (FieldSize= SINGLE) SINGLE SQL_REAL NUMBER (FieldSize= DOUBLE) DOUBLE SQL_DOUBLE NUMBER (FieldSize= BYTE) UNSIGNED BYTE SQL_TINYINT NUMBER (FieldSize= INTEGER) SHORT SQL_SMALLINT NUMBER (FieldSize= LONG INTEGER) LONG SQL_INTEGER...
FirstCol.Type = ADOX.DataTypeEnum.adInteger; FirstCol.Name = "StuID"; FirstCol.Properties["Jet OLEDB:Allow Zero Length"].Value = false; FirstCol.Properties["AutoIncrement"].Value = true; tbl.Columns.Append(FirstCol, ADOX.DataTypeEnum.adInteger, 0); Columns 属性: 使用Name属性标识列。 使用Ty...
1、新建MFC对话框 IDD_DataOut,类名CDataOut,生成DataOut.h和DataOut.cpp; 2、将GridCtrl.cpp、GridCtrl.h等文件加到工程中,并编译 添加GridCtrl_src下文件后,VS2010编译报错: gridctrltest\memdc.h(26): error C2011: “CMemDC”:“class”类型重定义 ...
IntegerAllows whole numbers between -32,768 and 32,7672 bytes LongAllows whole numbers between -2,147,483,648 and 2,147,483,6474 bytes SingleSingle precision floating-point. Will handle most decimals4 bytes DoubleDouble precision floating-point. Will handle most decimals8 bytes ...
Accurate Integer part from double number Acess an arraylist from another class? Activator.Createinstance for internal constructor Active Directory Error: Unknown Error (0x80005000) Active Directory problem: Check if a user exists in C#? Active Directory User does not assign User logon name and User...
Check valid decimal and integer values using TSQL Checking for the existence of a SQL Agent Job Checking how long a Stored procedure has been run? Checking if xp_cmdshell is enabled or not Chinese characters issue with T-SQL. Clear tempDB data CLR semaphore Clustered index update in execution...
There's nothing wrong with collecting information about customers, as long as that information is not misused, or sold without permission. Building a database of customer habits is useful not only as a mechanism for feedback to management, but also as a means of providing individually tailored ...
written as > or GT Less than, written as < or LT Greater than or equal to, written as >= or GE Less than or equal to, written as <= or LE 16 z/OS V2R1.0 DFSMS Access Method Services Commandsz/OS V2R1 DFSMS AMS Commands number number is the decimal integer that the program ...