date_value:=extract(date_field from [datetime_value|interval_value]) SQL> select extract(month from sysdate) "This Month" from dual; This Month --- 6 SQL> select extract(year from add_months(sysdate,36)) " Years" from dual; Years --- 2008 10。localtimestamp()返回会话中的日期和时间 ...
8。dbtimezone()返回时区 SQL> select dbtimezone from dual;DBTIME --- -08:009。extract()找出日期或间隔值的字段值 date_value:=extract(date_field from [datetime_value|interval_value]) SQL> select extract(month from sysdate) "This Month" from dual;This Month --- 6SQL> select extract(year...
SQL> select sessiontimezone,current_date from dual; SESSIONTIMEZONE CURRENT_DA --- --- +08:00 13-11月-03 SQL> alter session set time_zone=''-11:00'' 2 / 会话已更改。 SQL> select sessiontimezone,current_timestamp from dual; SESSIONTIMEZONE CURRENT_TIMESTAMP --- --- -11:00 12-...
NAME = 'opened cursors current') AA GROUP BY AA.USERNAME, AA.MACHINE ORDER BY AA.USERNAME, AA.MACHINE; #查询当前正在消耗临时空间的sql语句 Select distinct se.username, se.sid, su.blocks * to_number(rtrim(p.value))/1024/1024 as space_G, su.tablespace, sql_text from V$TEMPSEG_USAGE ...
SQL> select dbtimezone from dual; DBTIME --- -08:00 9。extract()找出日期或间隔值的字段值 date_value:=extract(date_field from [datetime_value|interval_value]) SQL> select extract(month from sysdate) "This Month" from dual; This
TO_CHAR(datetime, 'format') TO_DATE(character, 'format') TO_TIMESTAMP(character, 'format') TO_TIMESTAMP_TZ(character, 'format') SQL 产生的结果 SELECT TO_CHAR(current_timestamp, 'format') FROM DUAL; 1 Format List item YYYY-MM-DD 2015-06-15 YYYY-MON-DD 2015-JUN-15 YYYY-MM-DD HH...
MySQL、SQL Server、Oracle、PostgreSQL的常用内置函数如下：MySQL： 数学运算：ABS、CEIL、FLOOR。 字符串处理：STR_TO_DATE、DATE_FORMAT、CONCAT、SUBSTRING、UPPER、LOWER。 日期时间操作：DATEDIFF。SQL Server： 数学函数：ABS、ROUND、CEILING。 字符串函数：CONCAT、SUBSTRING、REPLACE。 日期时间函数：GE...
SELECT CURRENT_TIMESTAMP() select getdate()(SqlServer) pg:now() 四、format格式字符串编号 1、 STR_TO_DATE(date,format ): SELECT STR_TO_DATE(‘2021-03-25', '%Y-%m-%d') 2、sqlserver convert(datetime,'YYYY-MM-DD HH24:MI:SS') ...
Section added to describe how to use the System DateTime as a parameter. Paragraphs added to describe how to use the System DateTime in a datetime prompt. X X xv xvi 1 1Introduction to Oracle Business Activity Monitoring This chapter provides a brief overview of Oracle Business Activity ...
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