selectSYSDATE,--当前日期:2024-04-29ADD_MONTHS(SYSDATE,3),--当前日期加上3个月后:2024-07ADD_MONTHS(SYSDATE,-4)--当前日期减去4个月后:2023-12from dual; LAST_DAY函数 常用于具体的算法,例如想要获取指定日期所在月份的最后一天。 LAST_DAY(date): 返回指定日期所在月份的最后一天。 代码语言:javascript...
virtual_column FILLER,--这是一个虚拟字段,用来跳过由 PL/SQL Developer 生成的第一列序号user_idnumber,--字段可以指定类型,否则认为是 CHARACTER 类型, log 文件中有显示user_name, login_times, last_login DATE "YYYY-MM-DD HH24:MI:SS"--指定接受日期的格式,相当用 to_date() 函数转换) 其中append为...
System.out.format("The value of "+"the float variable is "+"%f, while the value of the "+"integer variable is %d, "+"and the string is %s",floatVar,intVar,stringVar); 第一个参数“format”是一个格式字符串,指定如何格式化第二个参数“args”中的对象。格式字符串包含纯文本和格式说明符,...
11.1 Match Options Character Class Description c Case sensitive matching i Case insensitive matching m Treat source string as multi-line activating Anchor chars n Allow the period (.) to match any newline character 11.2 Posix Characters Character Class Description [:alnum:] Alphanumeric characters [...
正则表达式编纂,主要用于非固定长度的character类型数据进行部分加密; 举例:测试email加密 SQL> BEGIN DBMS_REDACT.ADD_POLICY( object_schema => 'U1', object_name => 'TAB3', column_name => 'EMAIL', policy_name => 'redact_3', function_type => DBMS_REDACT.REGEXP, ...
SELECT LAST_DAY(ADD_MONTHS(SYSDATE, -2)) FROM DUAL; 1. 2. MONTHS_BETWEEN Returnsthe number of months betweendate1anddate2 返回date2与date1间相隔的月份数 SELECT MONTHS_BETWEEN(TO_DATE('2011-05-03','YYYY-MM-DD'), TO_DATE('2011-01-23','YYYY-MM-DD')) FROM DUAL; ...
17、Timestamp for the last modification of the object resulting from a DDL statement (including grants and revokes)TIMESTAMPVARCHAR2(20)Timestamp for the specification of the object (character data)STATUSVARCHAR2(7)Status of the object (VALID, INVALID, or N/A)TEMPORARYVARCHAR2(1)Whether the ...
The following statement updatesHunold'shire date using theTO_DATEfunction with the format mask 'YYYY MM DD' to convert the character string '1998 05 20' to aDATEvalue: UPDATE employeesSET hire_date = TO_DATE('1998 05 20','YYYY MM DD')WHERE last_name = 'Hunold'; ...
For example, you can download either a single event or a group of events:Use the following command to download a single business event, such as wfdemoe.wfx. In the filename, the first two or three characters refer to the product and the last character 'e' refers to Event. java oracle...
The charset filter has one attribute, CHARSET, which takes the NLS name of the source character set. A list of NLS charsets can be found in the Oracle National Language Support Guide. The destination character set is always the database character set, so does not need to be specified. ...