就会去查dba_types,太多了,大概扫一眼,加个owner为空的条件,就是oracle里的所有“基本”数据类型,除了发现的确有"time"这个类型外,还发现有些类型的名称和实际使用的不完全一致,比如常见的"PLS_INTEGER"在视图里的名称和CODE均为"PL/SQL PLS INTEGER"。
SQL> select column_name,data_type,data_length,data_precision,data_scale from user_tab_cols where table_name='T'; timestamp(6), timestamp(9) 都会占用11个bytes,date占7个bytes,所以精度只要求到秒的,date类型就可以,比timestamp类型节省空间。 另外oracle可以为date类型或timestamp类型指定默认值 sysdat...
Every Oracle developer knows that the best way to avoid version and format compatibility issues with DATE and TIME is to use the TO_DATE() function: UPDATE TABLE_EXAMPLE SET DATE_EXAMPLE = TO_DATE(‘2005-07-11’,’YYYY-MM-DD’) Using TO_DATE() you explicitly declare the format of th...
The date and time data types for representing temporal values are DATE, TIME, DATETIME, TIMESTAMP, and YEAR. Each temporal type has a range of valid values, as well as a “zero” value that may be used when you specify an invalid value that MySQL cannot represent. The TIMESTAMP and DAT...
Summary: in this tutorial, you’ll learn about the Oracle TIMESTAMP data type and how to handle TIMESTAMP data effectively in the Oracle Database. Introduction to Oracle TIMESTAMP data type The TIMESTAMP data type allows you to store date and time data including year, month, day, hour, mi...
Oracle date/time types In Oracle, thedateformat and thetime zonefeatures include multiple data types, including:DATE,TIMESTAMP,TIMESTAMP WITH TIME ZONEandTIMESTAMP WITH LOCAL TIME ZONE. TheTIMESTAMPdata type is an extension of theDATEtype. ...
System.ValueType Oracle.DataAccess.Types.OracleTimeStamp Declaration // C#public struct OracleTimeStamp : IComparable, INullable, IXmlSerializable Requirements Thread Safety All public static methods are thread-safe, although instance methods do not guarantee thread safety. ...
If the time format of another database is different from that of GaussDB(DWS), modify the value of the DateStyle parameter to keep them consistent. Table 1 Date/Time Types Name Storage Space DATE In Oracle compatibility mode, it is equivalent to timestamp(0) and records the date and tim...
oracle.sql Class TIMESTAMP java.lang.Objectoracle.sql.Datumoracle.sql.TIMESTAMP All Implemented Interfaces: java.io.Serializable public classTIMESTAMP extendsDatum implements java.io.Serializable TIMESTAMP Class TheTIMESTAMPclass provides conversions between the Oracle Date (ldx_t) data type and Java ...
If you are upgrading Oracle-based Content Platform Engine data, the auto-upgrade converts the Content Engine DateTime property columns from the Oracle DATE data type to the Oracle TIMESTAMP data type. However, if there is a function-based index that i...