global temporary table oracle 11g performance

Edition Release11.2.0.3.0Connected asCmigdw@CMIG_TESTSQL> EXECDbms_redefinition.start_redef_table ('CMIGDW','Test_date_dim','test_date_dim2'); beginDbms_redefinition.start_redef_table ('CMIGDW','Test_date_dim','test_date_dim2');End; ORA-12089: Cannot redefine table "CMIGDW" without a primary key online. " Test_date_dim "ORA-06512: In "SYS. Dbms_redefinition ", line AboutORA-06512: In "SYS. Dbms_redefinition ", line1490ORA-06512: On line1Need to have

There was a problem querying this comment after annotating the table:Add notes to a tableComment on table emp is ' employee table ';Query commentsSelect COMMENTS from user_tab_comments where table_name= ' emp ';Results:Row not selectedChange statement:Select COMMENTS from user_tab_comments where table_name= ' EMP ';Query the results.Reason:Creating a table with C

The new feature of Oracle 11g r2, delay segment creation, that is, the default table created from 11GR2 does not set and allocate segment, and does not occupy disk space, which sounds reasonable, space is allocated only when the first data is inserted. Test Sys @ ANBOB> conn anbob/anbob Connected. Anbob @ ANBOB>Select*FromV $ version; BANNER -------------

Label:in Oracle 11g R2, it was found that the traditional exp could not export the empty table, and then queried, find the following steps to take, notes. Oracle 11g has a new parameter: deferred_segment_creation, meaning segment delay creation, which is true by default.Wh

Tags: character tab create file variable order default Max RIPCREATE Table Statement CREATE table [schema.] Table name (column datatype [DEFAULT expr][, ...]); Specify a default value for the column during the insertion ... hire_date date DEFAULT sysdate,... The default value must satisfy the data type definition of the column CREATE

Today on the oracle11g with the EXP command to export when encountered a strange phenomenon, no data table exp is always not out, the query found this is a new feature of Oracle 11g, when the table has no data, do not allocate segment, to save space. When using the EXP command, tables without segment are not exported.W

; ALTER TABLE aq$_kupc$datapump_quetab_i allocate extent; ' Altertable ' | | table_name| | ' allocateextent; '-----------------------------------------------------------ALTER TABLE aq$_sys$service_metrics_tab_t allocate extent;ALTER TABLE Aq$_sys$service_metrics_tab_h allocate extent;ALTER TABLE Aq$_sys$service_metri

Tags: style io color ar os using SP for strongA new feature in 11g is the partition table for the system, and here's an experiment:Sql> select * from V$version;BANNER--------------------------------------------------------------------------------Oracle Database 11g Enterprise Edition Release 11.2.0.1.0-64bit Production

.DBF ' autoextend off;Database altered.CREATE TABLE Spacesql> Create Tablespace TPCCDataFile '/u01/app/oracle/oradata/king/tpcc01.dbf 'Size 1024MExtent Management LocalUniform size 1M;Tablespace created.adding tablespace data filesSql> Alter Tablespace TPCCAdd datafile '/u01/app/oracle/oradata/king/tpcc02.dbf 'Size 1024M;Tablespace altered.Move a tablespace data

oracle| temporary table 1, when the specified temporary table is on commit preserve rows (sessions), in the current session as if you want to drop the table, Oracle prompts: DROP

Oracle 11g import and export table method summary also said, the above method: Export: www.2cto.com Fang Yi: 1. first set oracle_sid. 2. find the bin directory. my options are D: \> cd D: \ app \ Administrator \ product \ 11.2.0 \ dbhome_1 \ BIN 3. execute exp scott/root @ jxgl21 file = D: \ t. dmp tables = (S) // S indicates the

there is a problem with the SQL logic, but 10046 there is no trace to the execution plan, but read the logical reading, the slow one should have produced a Cartesian product. After a simple check, SQL logic does not have a problem, people's first feeling is not necessarily reliable.4. I was wondering what led to the implementation plan is not allowed, suddenly think of Rel_oid_classify is a global temporary