0)Oracle data type to theboolEDM type. For example,Number(1,0), which is mapped toInt16by default, can be custom mapped to the .NETBoolor .NETBytetype. This example mapsNumber(3,0)tobyte, and sets the maximum precisions for theInt16, Int32,andInt64data types to 4, 9, and 18 ...
Store unicode character data encoded by NLS_NCHAR_CHARACTERSET For aUnicode Standard-enabled database(NLS_CHARACTERSET is set to AL32UTF8), we can also use datatype char to store unicode character data.NChar isNOTthe preferred option to store unicode character data. NVarChar2 Store unicode charac...
1>.NUMBER类型细讲: Oracle number datatype 语法:NUMBER[(precision [, scale])] 简称:precision –> p scale –> s NUMBER(p, s) 范围: 1 <= p <=38, -84 <= s <= 127 保存数据范围:-1.0e-130 <= number value < 1.0e+126 保存在机器内部的范围: 1 ~ 22 bytes 有效为:从左边第一个不...
alter table 表名 modify 字段名 default 默认值;如test表中设置age字段为30，可用如下语句：alter table test modify age default 30;
oracle本来就没有int类型,为了与别的数据库兼容,新增了int类型作为number类型的子集。 int类型只能存储整数; number可以存储浮点数,也可以存储整数; number(8,1)存储小数位为1位,总长度为8的浮点数,如果小数位数不足,则用0补全; number(8)存储总长度为8的整数; ...
An Oracle CHAR data type that contains a fixed-length character string with a maximum size of 2,000 bytes. Use the .NET String or OracleClient OracleString data type in Value. Clob 4 An Oracle CLOB data type that contains character data, based on the default character set on the server,...
( "ID" NUMBER(*,0) ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT) ...
procedure register_table (p_appl_short_name in varchar2, p_tab_name in varchar2, p_tab_type in varchar2, p_next_extent in number default 512, p_pct_free in number default 10, p_pct_used in number default 70); procedure register_column (p_appl_short_name in varchar2, p_tab_name...
(可选)在分发服务器上,对任意一个数据库执行 sp_getdefaultdatatypemapping。 指定 @source_dbms、 @source_type、 @destination_dbms、 @destination_version以及标识源 DBMS 所需的其他任何参数。 将使用输出参数返回有关目标 DBMS 中当前映射的数据类型的信息。 (可选)在分发服务器上,...
( "ID" NUMBER(*,0) ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT) ...