Flashback Query本身不会恢复任何操作或修改,也不能告诉你做过什么操作或修改,实际上Flashback Query特性实际应用时,是基于标准SELECT的扩展,借助该特性能够让用户查询到指定时间点的表中的记录,相当于拥有了看到过去的能力,至于恢复,SELECT的结果都出来了,难道还不懂如何执行INSERT TABLE SELECT或CREATE TABLE AS SELEC...
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current_timestamp() - interval 12 hours date_sub(current_date(), 1) 任何其他可轉換成時間戳的表達式 version 是一個長值,可從的 DESCRIBE HISTORY table_spec輸出取得。兩timestamp_expression者version都不能是子查詢。範例SQL 複製 > SELECT * FROM events TIMESTAMP AS OF '2018-10-18T22:15:12.013...
ANSI SQL has the "Temporal" feature, which is supported onMariaDB,MS SQL server, DB2 and more. When a table is set to be "temporal", the following syntax is available: INSERT INTOrecovered_tableSELECT*FROMold_table FOR system_timeASOFTIMESTAMP'2005-04-04 09:30:00'--^~~~^WHEREid BET...
SELECT --C.1 p.name AS [Package], p.description AS [Package-Description] FROM sys.dm_xe_packages AS p ORDER BY p.name; 輸出以下為封裝清單。展開資料表 PackagePackage-Description 檔案資料流 SQL Server FILESTREAM 和 FileTable 的擴充事件 package0 預設套件。 包含所有標準類型、對應、比較運算子...
SELECT--C.1p.nameAS[Package], p.descriptionAS[Package-Description]FROMsys.dm_xe_packagesASpORDERBYp.name; 输出 以下是包的列表。 程序包Package-Description 文件流 (filestream)SQL Server FILESTREAM 和 FileTable 的扩展事件 package0默认包。 包含所有标准类型、映射、...
(SELECT * FROM employees AS OF TIMESTAMP (SYSTIMESTAMP - INTERVAL '60' MINUTE) MINUS SELECT * FROM employees; 场景 CREATE TABLE flashback_query_test ( id NUMBER(10) ); SELECT current_scn, TO_CHAR(SYSTIMESTAMP, 'YYYY-MM-DD HH24:MI:SS') FROM v$database; ...
with_query_name [ ( column_name [, ...] ) ] AS [ [ NOT ] MATERIALIZED ] ( {select | values | insert | update | delete} ) 其中指定查询源from_item为: {[ ONLY ] table_name [ * ] [ partition_clause ] [ [ AS ] alias [ ( column_alias [, ...] ) ] ] [ TABLESAMPLE ...
USE AdventureWorks; GO IF OBJECT_ID ('dbo.T1', 'U') IS NOT NULL DROP TABLE dbo.T1; GO CREATE TABLE dbo.T1 ( column_1 int IDENTITY, column_2 varchar(30) CONSTRAINT default_name DEFAULT ('my column default'), column_3 timestamp, column_4 varchar(40) NULL ); GO INSERT INTO dbo....
The specified query sourcefrom_itemis as follows: {[ ONLY ] table_name [ * ] [ partition_clause ] [ [ AS ] alias [ ( column_alias [, ...] ) ] ] [ TABLESAMPLE sampling_method ( argument [, ...] ) [ REPEATABLE ( seed ) ] ] [ TIMECAPSULE {TIMESTAMP | CSN} expression ] ...