Oracle

Test Scenario: Oracle database has exceeded the number of links, Iserver is automatically connected.Test steps:(1) Set the maximum number of connections for the 85,oracle background process has 83:(2) Turn on 3 iserver (A,b,c) A, a, release test is

From Wolfaone, Oracle has no integer type, what is the maximum value of this type?Integer is a subtype of number type:Number TypeThe number datatype to store fixed or floating point numbersof virtually any size. You can specify precision, which are

First step: Create a tableCREATE TABLE Toppersoninfo(ID number (10,0) DEFAULT 0,--id encodingPERSONID VARCHAR2 (+) DEFAULT ',--employee ID Unique identificationPersonName VARCHAR2 (+) DEFAULT ',--Name of personCompanycode VARCHAR2 (+) DEFAULT

1, ORA-01502: Index ' Dbepms. sys_c009390 ' or partition of such index is in an unusable stateWORKAROUND: [Note index naming rules ix_ table name _ Column name/ix_ table name _ ordinal (index length within 30 characters)](1) Rebuilding index: Alter

1 in the data migration, the user first has the right to modify the database, and make table space creation, deletion and other rights such as: SELECT * from Dba_tab_privs where grantee= ' SCOT '; ---View Scott permissions (SYS user login) The

Description: The listener service is inexplicably terminated and must be started manually.There are a lot of information about the problem on the net, and the following points are summarized.1, the address uses the host name, modifies the host file

Characteristics: You need to reinstall the old version of Libaio1_0.3.109-2ubuntu?_i386.deb. The default Libaio library has a problem and is related to the way it is compiled by default Libaio! The default GCC 4.9 requires

1. Stored Procedure DefinitionsA stored procedure (Stored Procedure), also known as a pre-stored procedure or stored procedure, is a complex program stored in a database.A database object that can be called by an external program as a function or

2.Oracle User Management(1) Creating User: Create username identified by password (DBA authority required);Sql>create user YZW identified by YZWDefault tablespace users//user table spaceTemporary tablespace temp//user Temp table spaceQuato 3m on

SYSDBA Telnet requires two conditions:1, remote_login_passwordfile =exclusive, enable password file, allow remote login;View Remote_login_passwordfile Parameterssql> SHOW PARAMETER Remote_login_passwordNAME TYPE VALUE---------------------------------

Ipcs-provide Information on IPC facilitiesDESCRIPTIONIPCS provides information on the IPC facilities for which, the calling process has read access.The-i option allows a specific resource ID to be specified. Only information on the this ID would be

To ensure that Oracle starts the service automatically after the next system reboot, we can do this with a shell footstep. Assume that the footstep name is/app/oracle/oraclestart.sh, which reads as follows: #!/bin/sh

There are three machines in the RAC cluster, a,b,cA,b,c will have 3 votes, assuming this is a heart jumper problem, the entire RAC cluster is divided into two paritition,One is only a partition, one is a b,c composed of partition,Two partition all

1. Copy the table structure and its data:CREATE TABLE Table_name_new as SELECT * from Table_name_old2. Copy only the table structure:CREATE TABLE Table_name_new as SELECT * from Table_name_old where 1=2;Or:CREATE TABLE table_name_new like Table_name_

1) Create a sequence: 1234567 createsequenceSEQ_TEST --字段名minvalue 1        --最小值maxvalue XXXXX      --设置最大值start with 1      --从1开始计数increment by1    --每次加1个nocycle           --一直累加，不循环nocache;          --不建缓冲区 2) sequence

In the AWR report, it was found that a SQL is inefficient:Select Batch_status from T_batch_infowhere batch_status= ' 0 'and sys_id= ' STM06 ';View execution Plan Discovery the query takes advantage of the index, which contains the Batch_status field,

　　--Create user test_user, and authorize connection, query view create user Test_user identified by Test_user;grant Connect to test_user;grant CREATE view to test_user;--Grant view references a table permission to a new user grant Select on

Common basic types of 1.oracle databasesCHAR (Ten)--store a fixed-length stringVARCHAR2 (Ten)--storing variable-length stringsDateinteger-to-store integersNumber (p,s)-->p the maximum number of digits that can be saved to the database, including the

Oracledbconsoleorcl:oracle Database Console service, ORCL is the instance identity of Oracle, and the default instance is ORCL. You need to start this service when you run Enterprise Manager (Enterprise Management Manager OEM). (does not have to be

1. Acting on a single row 2. Acting on multiple columns 3.COUNT Statistics 4.distinct must be placed at the beginning 5. Other In the table, duplicate values may be included. That's not a problem, but sometimes you might want to