你看,我们通过增加AS OF TIMESTAMP的语法,查询到的数据就是5分钟之前的,基于这一结果,可以轻易并且快速地将记录恢复: JSSPRE> INSERT INTO FLASH_TBL SELECT * FROM FLASH_TBL AS OF TIMESTAMP SYSDATE-5/1440 3 WHERE ID<10; 9 rows created. JSSPRE> COMMIT; 1. 2. 3. Commit complete. 成功插入9条...
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SELECT * FROM employees AS OF TIMESTAMP (SYSTIMESTAMP - INTERVAL '60' MINUTE); 可以在自连接中使用AS OF子句,或者INTERSECT和MINUS提取或者比较两个不同时间点的数据 也可以使用下面的方法恢复丢失的数据 INSERT INTO employees (SELECT * FROM employees AS OF TIMESTAMP (SYSTIMESTAMP - INTERVAL '60' MI...
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...
In Oracle DB, there is anAS OFclauseto read from a historical table without affecting the global timestamp. INSERT INTOrecovered_tableSELECT*FROMold_tableASOFTIMESTAMPTO_TIMESTAMP('2005-04-04 09:30:00','YYYY-MM-DD HH:MI:SS')--^~~~^WHEREid BETWEEN1000AND1999; A similar syntax exists o...
SELECT--C.2Count(*)AS[Count-of-Type], o.object_typeFROMsys.dm_xe_objectsASoGROUPBYo.object_typeORDERBY1DESC; 输出 下面是每个对象类型的对象的计数。 大约有 1915 个对象。 Count-of-Typeobject_type 1303event 351map 84message 77pred_compare ...
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 ] ...
If any value of TIMESTAMP is zero, which is outside the range of the Parquet TIMESTAMP, the following error message may occur: Copy can not be saved as TIMESTAMP with millisecond precision because zero value is outside the scope of the parquet type; consider casting this column to INT64 ...
含frame聚合函数的SELECT语句。如: SELECT time, subject, val, SUM(val) OVER ( PARTITION BY subject ORDER BY time ROWS UNBOUNDED PRECEDING --- window function 中的 frame 定义,IMCI 不支持 ) AS running_total FROM observations;子查询出现在GROUP BY clause 中的SELECT语句。如:SELECT SUM(a) FROM ...
select * from syscat.tables ABSCHEMA: SERVER1 TABNAME: ACTLOG CREATE_TIME: 1999-05-01 07:39:06 COLCOUNT: 10 INDEX_COLCOUNT: 1 UNIQUE_INDEX: FALSE REMARKS: Server activity log TABSCHEMA: SERVER1 TABNAME: ADMIN_SCHEDULES CREATE_TIME: 1995-05-01 07:39:06 COLCOUNT: 14 INDEX_COLCOUNT:...