select to_number(to_char(last_day(sysdate), 'dd')) into v_days from dual; end; i := 1; begin select last_day(add_months(sysdate, -1)) into v_date from dual; while i <= v_days loop insert into hkb_date values(v_
cat>/tmp/create_part.sh<<EOF dateStr=\$(date -d '+1 days' +%Y%m%d); psql -c "CREATE TABLE tab_\$dateStr (LIKE tab INCLUDING INDEXES); ALTER TABLE tab ATTACH PARTITION tab_\$dateStr FOR VALUES IN ('\$dateStr')"; EOF (crontab -l2>/dev/null;echo"0 14 * * * bash /tmp/...
select * from `user` where DATE_FORMAT(pudate,'%Y%m') = DATE_FORMAT(CURDATE(),'%Y%m') ; select * from user where WEEKOFYEAR(FROM_UNIXTIME(pudate,'%y-%m-%d')) = WEEKOFYEAR(now()) select * from user where MONTH(FROM_UNIXTIME(pudate,'%y-%m-%d')) = MONTH(now()) select * ...
数据集成实时同步任务存在如下约束与限制: 数据集成对ADD COLUMN进行了特别支持: 约束:ADD COLUMN时不能有ADD COLUMN和DROP COLUMN或者其他DDL的组合。 重要 ADD COLUMN时其他DROP COLUMN、RENAME COLUMN等ALTER COLUMN的行为将使数据同步任务不能正常工作。 限制:除了ADD COLUMN外,无法识别用户的其他DDL操作。 不支持AL...
从current_date减去参数(在午夜)。 age(timestamp '1957-06-13')→ 62 years 6 mons 10 days clock_timestamp ( ) → timestamp with time zone 当前日期和时间(在语句执行期间变化)。 clock_timestamp()→ 2019-12-23 14:39:53.662522-05 current_date→ date 当前日期。 current_date→ 2019-12-23 ...
在PostgreSQL中,我们可以将Julian date (YYYYDDD) 转换为标准的日期格式YYYYMMDD。 要将Julian date (YYYYDDD) 转换为YYYYMMDD格式,可以使用PostgreSQL的日期函数和操作符。下面是一个示例查询: 代码语言:txt 复制 SELECT TO_CHAR(TO_DATE('2022001', 'YYYYDDD'), 'YYYYMMDD'); 在这个查询中,我们使用TO_DAT...
based on the Program, or the modifications to produce it from the Program, in the form of source code under the terms of section 4, provided that you also meet all of these conditions: a) The work must carry prominent notices stating that you modified it, and giving a relevant date. b...
Oracle add_months的解释如下 : http://docs.oracle.com/cd/B19306_01/server.102/b14200/functions004.htm ADD_MONTHS returns the date date plus integer months. The date argument can be a datetime value or any value that can be implicitly converted to DATE. The integer argument can be an inte...
Your PostgreSQL users have a generous number of native data types at their fingertips, including JSONB and PostGIS, and they can also add new PostgreSQL data types easily. Each data type is designed to support a unique purpose, such as full-text search and date and time data. To create ...
-z | --zcat exec_path : set the full path to the zcat program. Use it if zcat, bzcat or unzip is not in your path. -Z | --timezone +/-XX : Set the number of hours from GMT of the timezone. Use this to adjust date/time in JavaScript graphs. The value can be an integer...