The new current date was adjusted to about -2 hours as expected. In this tutorial, you have learned how to use the OracleCURRENT_DATEfunction to get the current date and time in the session time zone.
格式化日期:TO_CHAR(SYSDATE(),'YY/MM/DD HH24:MI:SS) 或TO_DATE(SYSDATE(),'YY/MM/DD HH24:MI:SS) 格式化数字:TO_NUMBER 注: TO_CHAR 把日期或数字转换为字符串 TO_CHAR(number, '格式') 、TO_CHAR(salary, '$99,999.99') 、TO_CHAR(date, '格式') TO_DATE 把字符串转换为数据库中的日期...
create or replace function sys_date return date is begin return sysdate; end; select to_char(sys_date,'hh:mi:ss') from all_objects; 12. 获得小时数 SELECT EXTRACT(HOUR FROM TIMESTAMP '2001-02-16 2:38:40') from offer SQL> select sysdate ,to_char(sysdate,'hh') from dual; SYSDATE ...
to_char() function The following are number examples for theto_char The following is a list of valid parameters when theto_char The following are date examples for theto_char You will notice that in some examples, theformat_mask The zeros have been suppressed so that the day component show...
11. select to_char(sysdate,'hh:mi:ss') TIME from all_objects 注意:第一条记录的TIME 与最后一行是一样的 可以建立一个函数来处理这个问题 create or replace function sys_date return date is begin return sysdate; end; select to_char(sys_date,'hh:mi:ss') from all_objects; ...
在工作中需要计算两个时间的差值,结束时间 - 开始时间,又不想在js里写function,也不想在Java里去计算,干脆就在Oracle数据库做了一个函数来计算两个时间的差值。格式为XX天XX时XX分XX秒; 上代码: CREATE OR REPLACE FUNCTION F_GET_DIFF_TIME(START_TIME IN DATE, END_TIME IN DATE) RETURN VARCHAR2 IS ...
for format code D 11 select to_char(sysdate,'hh:mi:ss') TIME from all_objects 注意:第一条记录的TIME 与最后一行是一样的 可以建立一个函数来处理这个问题 create or replace function sys_date return date is begin return sysdate; end; select to_char(sys_date,'hh:mi:ss') from all_objects...
The Oracle Database 10gPre-Upgrade Information Utility (utlu102i.sql) estimates the additional space required in theSYSTEMtablespace and in any tablespaces associated with the components that are in the database (for example, SYSAUX, DRSYS). For a manual upgrade, be sure to run this utility ...
TheCURRENT_SCHEMAparameter has been added to theSYS_CONTEXTfunction. This release contains support for theTO_TIMESTAMPSQL function.TO_TIMESTAMPis a datetime function that converts aCHARorVARCHAR2data type to a value ofTIMESTAMPdata type.
Hint: to reduce amount of manual typing and typing errors, use copy and paste functions to copy the file name or tab function to auto complete a file name. Also, use the up arrow to repeat the previous command, and then edit the file name. Note: On an actual Oracle Database Appliance...