selectlast_day(sysdate)fromdual;selectto_char(last_day(sysdate),'YYYY-MM-DD')fromdual; 1. 2. 七、ADD_MONTHS(date,i) 对指定date日期加上指定i月,若i为负数,则是减去指定的月数,返回DATE selectadd_months(sysdate,1)fromdual;--查看每个员工入职20周年纪念日selectename,to_char(hiredate,'YYYY-MM...
INTO v_count; .PUT_LINE('The employee count is : ' || v_count); := 'DECLARE ' || --声明一个PL/SQL块,存放到变量plsql_block中 ' v_date DATE; ' || 'BEGIN ' || ' SELECT SYSDATE INTO v_date FROM DUAL; ' || ' DBMS_OUTPUT.PUT_LINE (TO_CHAR(v_date,''DD-MON-YYYY''))...
SQL> select sysdate from dual; SYSDATE 03/01/2020 09:56:53 SQL> alter session set time_zone = ‘-08:30’; Session altered. SQL> (select ‘dbtimezone’ as config, dbtimezone as offset from dual) union (select ‘sessiontimezone’ as config, sessiontimezone as offset from dual); CONF...
(sysdate) - 1 and a.fildate >= trunc(sysdate) - 35 group by a.gdgid, s.orggid ), -- cte s4 temp_7daysale as( select a.gdgid, s.orggid, sum(a.qty) quantity, sum(a.amt) saleamt from std_sm_outdrpt a left join store s on a.snd = s.gid inner join v_belongsort_...
(SYSDATE, 'day'),--截取到周(本周第一天,即上周日) TRUNC(SYSDATE) --截取到当天,舍去时分秒 FROM DUAL; SELECT TRUNC(SYSDATE...FROM DUAL; (4)业务周 业务周是上周六到本周五 SELECT trunc(sysdate, 'iw') - 2, trunc(sysdate, 'iw') + 4 FROM DUAL...; 说明: sysdate所在的本周一前移2天...
Postgresql中时间减法运算结果都是interval,但是在Oracle中sysdate与date减法结果是numeric,差异会导致一些函数无法正确使用,比如 ceil 、 round等等,这里总结改造方法。 2 场景分析 Oracle中并不是所有的时间减法都是会等于浮点型,这里分析几种场景。 date - date:返回整型 Oracle 代码语言:javascript 代码运行次数:0 运...
SQL>selectsysdate - to_date('2017-01-01','yyyy-mm-dd')fromdual; SYSDATE-TO_DATE('2017-01-01','YYYY-MM-DD')---501.794444 PostgreSQL 例子 1、原生时间相减返回的是interval postgres=#selectnow() - to_timestamp('2017-01-01','yyyy...
MySQL: SELECT sysdate() PostgreSQL: SELECT now() 4、find_in_set()函数(允许在逗号分隔的字符串列表中查找指定字符串的位置) MySQL: SELECT t.dept_id FROM sys_dept t WHERE find_in_set(‘100’, ancestors) PostgreSQL: SELECT t.dept_id FROM sys_dept t WHERE ‘100’ = ANY (string_to_array...
1、Oracle数据库:select sysdate from Table1; 2、Infomix数据库:select current from sysmaster:sysshmvals; 3、DB2数据库:select current timestamp from sysibm.sysdummy1 4、SQL Server数据库:select getdate(); 5、Access 数据库:select * from table1 where Date=" & date() ...
select NULL::"unknown" where 1=1; (4)sysdate替换方案 sysdate --> now() trunc(sysdate) --> now()::date sysdate - ? --> now() - (? || 'day')::interval (5)NVL函数替换方案 coalesce(arg1, arg2, arg3...) (6)rownum替换方案 ...