Learn from Chapter 5 of Oracle development art of breaking through the iceberg GROUP BY
For simple group by statements, it is difficult to analyze the complex dimensions, and it is difficult to meet the requirements of the actual production of complex reports. The extension feature of group by is needed. The union statement can also meet the r ...
Posted on Mon, 23 Mar 2020 05:00:57 -0400 by shrimp
1. Environment deployment 2
1. 1. Modify the database to archive mode. 2
1. 2 create test table 2
2. Backup preparation 2
2. 1 full database backup 2
2. 2 copy parameter file 2
2. 2. 1 view parameter file path 2
2. 2.2 copy parameter file 3
2. 2.4 creating dynamic files 3
2. 5 copying archives 3 ...
Posted on Fri, 13 Mar 2020 05:50:20 -0400 by lin
linux Installation of OCI client and php installation of oci8 extension
oci client installation
Install oci8 extension
oci client installation
Download packageoracle-instantclient18.3-basic-22.214.171.124.0-1.x86_64.rpmoracle-instantclient18.3-devel-126.96.36.199.0-1.x86_64.rpmoracle-instantclient18.3-sqlplus-188.8.131.52.0-1.x86_64.r ...
Posted on Sat, 28 Dec 2019 11:08:50 -0500 by zfred09
Both the voice and ocr in 11gR2 are under the same disk group, so recovery is integrated
View normal backups
[grid@rac1 admin]$ ocrconfig -showbackup
rac1 2019/05/08 12:27:51 /u01/app/11.2.0/grid/cdata/rac-cluster/backup00.ocr
rac1 2019/05/07 15:32:37 /u01/app/11.2.0/grid/cdata/rac-clu ...
Posted on Fri, 15 Nov 2019 12:23:45 -0500 by egmax
This article describes the functions in linux. In linux, functions are divided into single line functions and group functions. Single line functions are divided into string functions, number functions, date functions and other functions. Group functions are divided into max, min, avg, sum and count.
1 system, environment and preco ...
Posted on Wed, 06 Nov 2019 17:01:32 -0500 by TheDeadPool
Create users and tablespaces:
1. Log in to linux and log in as oracle user (if root is logged in, switch to oracle user with Su oracle command after login)
2. Open sqlplus in sysdba mode. The command is as follows: sqlplus / as sysdba
3. Create a temporary table space:
--Queries the absolute path of the temporary tablespace file. If necessary, ...
Posted on Tue, 29 Oct 2019 10:42:38 -0400 by parawizard
ORACLE import and export
EXP and IMP are client-side tools that can be used either on the client side or on the server side.
EXPDP and IMPDP are tool programs on the server side. They can only be used on the ORACLE server side, but not on the client side.
IMP only applies to EXP expo ...
Posted on Tue, 23 Jul 2019 00:57:41 -0400 by malam
Oracle Table Space and Guide Library Summary
I. Questions of Table Space
1.1 Table Space Creation
Path to your native environment: C: oracle product 10.2.0 oradata orcl
create tablespace LTSYSDATA01
datafile 'C:\oracle\product\10.2.0\oradata\orcl\LTSYSDATA01A.DBF' size 1024M
autoextend on next 50M maxsize unlimited logging
extent mana ...
Posted on Mon, 10 Jun 2019 14:45:03 -0400 by rj2kix
In Oracle, there are two optional parsing processes for a submitted sql statement, hard parsing and soft parsing.
A hard parsing needs to be parsed, execution path formulated, access plan optimized and other steps. Hard parsing not only consumes a lot of CPUs, but also occupies important latch resources. The only way th ...
Posted on Sun, 19 May 2019 13:45:53 -0400 by busterbry
ASM (Automatic Storage Management) is a storage method introduced after oracle 10g. It is a volume manager developed by oracle itself, which can organize multiple bare devices in volume groups, and achieve system-level vg management using oracle process management.Using ASM allows us to use bare devices more flexibly.
We view ...
Posted on Tue, 14 May 2019 23:20:24 -0400 by hughesa