Oracle provides you with two date-time data types:DATEandTIMESTAMPfor storing point-in-time data. In addition, It provides theINTERVALdata type that allows you to store periods of time. There are two types ofINTERVAL: INTERVAL YEAR TO MONTH– stores intervals using year and month. INTERVAL D...
Oracle里的时间类型分两大类 —— Datetime 和 Interval Data Types,本文主要关注第一类Datetime。 Datetime又可以分为四类,其中与时区有关的是后两类: DATE TIMESTAMP TIMESTAMP WITH TIME ZONE TIMESTAMP WITH LOCAL TIME ZONE 1. DATE 存储日期+时间,精确到秒,不存储时区和地区信息。输出格式和语言由 NLS_DAT...
RAW and LONG RAW Raw binary data BLOB Binary data(up to 4GB) BFILE Binary data stored in an external file(up to 4GB) ROWID A base-64 number system representing the unique address of a row in its table. Data Type Description TIMESTAMP Date with fractional seconds INTERVAL YEAR TO MONTH S...
このコンストラクタでは、OracleIntervalDS構造の新規インスタンスを作成し、指定した日、時、分、秒およびナノ秒を使用してその値を設定します。 宣言 // C# public OracleIntervalDS (intdays, inthours, intminutes, intseconds, intnanoseconds); パラメータ days 指定された日。日の範囲は(-999,...
As of Oracle9i Release 2, Oracle also supports two INTERVAL datatypes, INTERVAL YEAR TO MONTH and INTERVAL DAY TO SECOND, which are used for storing a specific amount of time. This data can be used for date arithmetic. Temporal validity Oracle Database 12c introduced a new concept related to...
OracleIntervalDS型変換を、表14-71にリストします。 表14-71 OracleIntervalDS型変換 演算子 説明 explicit operator TimeSpan OracleIntervalDS構造をTimeSpan構造に変換します explicit operator OracleIntervalDS 文字列をOracleIntervalDS構造に変換します implicit operator OracleIntervalDS TimeSpan構造...
查看数据库视图所包含的数据类型:SELECT * FROM DBA_TYPES WHERE OWNER IS NULL.具体细节情况参见Oracle® DatabaseSQL Language Quick Reference 10/11g 或官方文档 一 字符串类型 字符串数据类型还可以依据存储空间分为固定长度类型(CHAR/NCHAR) 和可变长度类型(VARCHAR2/NVARCHAR2)两种. ...
Interval Interval data types specify an interval of time. There are two interval data types: INTERVAL DAY TO SECOND A fixed-sized 11 byte data type that stores a time interval in days, hours, minutes, and seconds. INTERVAL YEAR TO MONTH ...
Extracting Data from INTERVAL Data Types:Extract specific parts from INTERVAL data types, such as year or day. Timezone Calculations and Reporting:Retrieve time zone details for global applications involving different regions. Combining EXTRACT with Other Functions:Combine with other Oracle functions for...
OracleDatabase 10gEnterprise Edition Release 10.2.0.1.0 -Production With the Partitioning,OLAP and Data Mining options 已导出 ZHS16GBK 字符集和 AL16UTF16 NCHAR 字符集 即将导出整个数据库... . 正在导出表空间定义 ... . 正在导出 pre-schema 过程对象和操作 . 正在导出簇定义 . 即将导出 SYSTEM 的...