count(*) as count where activated_at notnull ) 这是每周激活的供应商的查询计数数我需要把一周的开始日期从星期一改为星期六。类似的文章如how to change the first day of the week in PostgreSQL或Making Postgres date_trunc() use 浏览17提问于2020-08-20得票数 0 1回答 如何将Date.new...
当表发生特定事件(即INSERT,UPDATE和DELETE)时,它被激活。 CREATETRIGGERtrigger_name[BEFORE|AFTER|INSTEAD OF]event_nameONtable_name[-- Trigger logic goes here...]; 在这里,event_name可以是INSERT,UPDATE,DELETE和TRUNCATE数据库操作上提到的表table_name。 您可以选择在表名后指定FOR EACH ROW。 CREATETRIGG...
date_trunc 的简单用法如下: /* show the beginning of the first day of the month */SELECTdate_trunc('month',current_date);/* show the beginning of the first day of the week */SELECTdate_trunc('week',current_date);/* show the beginning of the first day of the year */SELECTdate_trun...
从星期一（1）开始的日期和结束日星期日（7））。
# | | | | .--- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat # | | | | | # * * * * * user-name command to be executed 00 * * * * root /usr/local/script/BackupDatabase #定义每天没小时执行备份数据库脚本 02...
The day of the week (0--6; Sunday is 0) (fortimestampvalues only) SELECT EXTRACT(DOW FROM TIMESTAMP '2001-02-16 20:38:40'); Result: 5 Note thatextract's day of the week numbering is different from that of theto_charfunction. ...
根据一天、一天、1小时、2小时和3小时的窗口计算聚合ENsensor_id, day_of_week, hour_of_day, avg...
Note that extract's day of the week numbering is different from that of the to_char function. doy The day of the year (1--365/366) (for timestampvalues only) ...
🎄 This week we're covering a few recent items but will then head into a 2024 roundup of how things went in the Postgres world, as well as the most clicked items of the year, in case you missed them at the time.We're taking a Christmas break for two weeks and will be back on...
Highgo's Grant Zhouis this week'sPostgreSQL Person of the Weekinterviewee. 🇳🇱 There's a new European Postgres event to add to the calendar!PGDay Lowlands.It takes place in Amsterdam this September. Crunchy Bridge Adds Iceberg to Postgres— Crunchy Data has extended itsCrunchy Bridge for ...