大约有 44,000 项符合查询结果（耗时：0.0160秒） [XML]
How to get current date & time in MySQL?
...
The correct answer is SYSDATE().
INSERT INTO servers (
server_name, online_status, exchange, disk_space,
network_shares, date_time
)
VALUES (
'm1', 'ONLINE', 'ONLINE', '100GB', 'ONLINE', SYSDATE()
);
We can change this behavior and ma...
创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...“create materialized view mv_tablename refresh fast on demand start with sysdate next sysdate+1/288 as select * from T_tablename@dblink_name;”。
现在，数据库A上此表的主键约束因主键字段值重复而被disable了，在第三个数据库C上新建这个物化视图却失败，...
Oracle Differences between NVL and Coalesce
...pe of the first parameter, so the following does not error
select nvl('a',sysdate) from dual;
COALESCE expects consistent datatypes.
select coalesce('a',sysdate) from dual;
will throw a 'inconsistent datatype error'
sh...
Can we have multiple “WITH AS” in single sql - Oracle SQL
...
Yes you can...
WITH SET1 AS (SELECT SYSDATE FROM DUAL), -- SET1 initialised
SET2 AS (SELECT * FROM SET1) -- SET1 accessed
SELECT * FROM SET2; -- SET2 projected
10/29/2013 10:43:26 AM
Follow the order in which it should be ini...
What is the dual table in Oracle?
...nt the results of some system function in a select statement:
e.g. select sysdate from dual;
See http://www.adp-gmbh.ch/ora/misc/dual.html
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Ora-00257 错误处理一列 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...，定时删除日志，如下：
DELETE ARCHIVELOG ALL COMPLETED BEFORE 'SYSDATE-7'; //删除七天前的归档
DELETE ARCHIVELOG FROM TIME 'SYSDATE-7'; //删除七天到现在的归档
Ora-00257 错误
Add 2 hours to current time in MySQL?
...This will also work
SELECT NAME
FROM GEO_LOCATION
WHERE MODIFY_ON BETWEEN SYSDATE() - INTERVAL 2 HOUR AND SYSDATE()
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MySQL Query - Records between Today and Last 30 Days
...te activity and complete activity for previous 30 days use this, since the SYSDATE is variable in a day the previous 30th day will not have the whole data for that day.
SELECT DATE_FORMAT(create_date, '%m/%d/%Y')
FROM mytable
WHERE create_date BETWEEN CURDATE() - INTERVAL 30 DAY AND SYSDATE()
...
How to wait for 2 seconds?
...e:
exec DBMS_LOCK.sleep(5);
This is the whole script:
SELECT TO_CHAR (SYSDATE, 'MM-DD-YYYY HH24:MI:SS') "Start Date / Time" FROM DUAL;
exec DBMS_LOCK.sleep(5);
SELECT TO_CHAR (SYSDATE, 'MM-DD-YYYY HH24:MI:SS') "End Date / Time" FROM DUAL;
...
How to select records from last 24 hours using SQL?
...TDATE())
In Oracle:
SELECT *
FROM mytable
WHERE record_date >= SYSDATE - 1
In PostgreSQL:
SELECT *
FROM mytable
WHERE record_date >= NOW() - '1 day'::INTERVAL
In Redshift:
SELECT *
FROM mytable
WHERE record_date >= GETDATE() - '1 day'::INTERVAL
In SQLite:
SELEC...