global temporary table oracle 11g performance

Label:Source: http://www.cnblogs.com/ningvsban/p/3603678.html There is a new feature in ORACLE 11G that does not allocate segment when the table has no data to save space. Workaround: 1) Insert a row, and then rollback will produce segment. The method is to insert data into the empty table and then delete it, resulting

Oracle 10g introduced the concept of the temporary tablespace Group (temporary tablespace Group), which allows users to take advantage of multiple temporary tablespace spaces simultaneously in different sessions. 1. Main features of the temporary

Atitit. mysql oracle with as mode temporary table mode CTE statement, reduce the subquery structure mssql SQL server..., atitit. mysqlcte Atitit. Use of the CTE statement in the temporary table mode of mysql oracle with as mode to

The statistical information of a global temporary table cannot be collected. If it is collected, its statistical information must be 0, which will lead to inaccurate execution plans. Therefore, you must lock the statistical information of the global temporary

query When deleting the data. As follows: Create table temporary TABLE (Select Field 1, Field 2, count (*) from table name group by field 1, Field 2 having count (*)> 1) The above statement creates a temporary table and inserts t

11g Oracle Export table does not export data as null by default 1, oracle11g default to empty table does not assign segment, so use EXP export oracle11g database, empty table will not export.2, set the Deferred_segment_creation parameter is false, whether it is empty

Tags: cursor plsql Oracle1. Create a session-level staging table: 2. Create a primary table and insert the data: Insert data: 3. Write a cursor query and insert 4. Verify that the data is inserted in the staging table: 5. Summary: 1) Temporary tables are divided into two types: Session-Level temp

Scenario: Temporary table space Full, unable to release The solution is summarized as follows: --1 Create transit temporary table space Create temporary tablespace temp02 Tempfile '/oradata/crpt_temp_tra.dbf ' Size 20G reuse autoextend on next 1M; --2 Modify user

The statistics of the global temporary table cannot be collected, if it is collected, its statistic is definitely 0, it will cause the execution plan is not allowed, so we should lock up its statistic information and prevent the system from collecting automatically.-- Unlock the table statistics First, then delete the

Today, one of my buddies said that some of the modules in OA were invalid, check the system log, the original Oracle database temporary table space is full, noon meal time to the database restart (this way the easiest and not easy to make mistakes), did not think of temporary table