Oracle

Today, the VM memory is reduced a little, and the following error occurs when the data is started:SQL> startupORA-00845: MEMORY_TARGET not supported on this systemI guess it should be the problem of system memory conflicts with sga. Then I checked

When I was building a system last night, I needed to query the spans of two time ranges. I used the TO_DATE function and wrote it at the beginning.SQL codeTO_DATE ('2017-09-24 00:00:00 ', 'yyyy-MM-DD HH: mm: ss ') The result reported that the ORA-018

1. Export the database TEST completely, and the username system Password manager is exported to D: \ daochu. dmp.Exp system/manager @ TEST file = d: \ daochu. dmp full = y 2. Export the tables of system users and sys users in the databaseExp

1. Single Table transfer tablespaceScenario: If a table user is stored in the tablespace oldspace, you must move the table user to the tablespace newspace. Execute the statement:Alter table user move tablespace newspace;Commit; 2. All tables under

There are three ways to install the Oracle mesh control agent (OMA): OUI, silent, and agentDownload, this section describes how to install the gc agent using OUI. Before you start, configure OMS and OMR, and prepare for the installation of OMA. For

Oracle Connect By usage The select statement in oracle can use the start with... connect by prior clause to implement recursive queries. The connect by clause is used in structured queries. Its basic syntax is as follows: Select... from Where Start

 1. DB_FILES PropertyDescriptionParameter typeIntegerDefault value200ModifiableNoRange of valuesMinimum: the largest among the absolute file numbers of the datafiles in the databaseMaximum: operating system-dependentBasicNoReal Application

ORA-16014: log string sequence # string not archived, no available destinations Flash Recovery Area insufficient space A user asked me a question today. The database reports an error. The error message is as follows:Errors in file e:/oracle/product/1

  Group and sort multiple data and obtain the first record in each group.   SQL code SELECT * FROM (SELECT ROW_NUMBER () OVER (partition by order by DESC) lev, .* FROM ) WHERE lev_= 1 Order by DESC   SELECT * FROM (SELECT ROW_NUMBER () OVER

Oracle has three main memory structures:The System Global Area (SGA) is a large shared memory segment. Almost all Oracle processes need to access a certain point in this zone.The Process Global Area (PGA) is the memory dedicated to a Process or

  The installation of ORACLE10G in red hat 5.4 is finally successful. ORACLE in WINDOWS is a little different from ORACLE in LINUX. It can be seen from a simple installation. When installing ORACLE in LINUX, you must first install the auxiliary

  The database can have two LOG modes: ARCHIVELOG mode and NOARCHIVELOG mode. In NOARCHIVELOG mode, online redo logs are not archived after they are fully written, so they cannot be recovered after a fault occurs. You can use the select log_mode

  Today, when a user is granted permissions, the system cannot log on to the database as sysdba, but the system can log on as sys. The differences are as follows: Sys users have the roles or permissions of dba, sysdba, and sysoper. You can only

  The following is the installation log for redhat as4 to install ORACLE10G     SilentInstall2008-01-08_06-33-09PM.log An error occurred while calling the target 'client _ sharedlib' of makefile

1. login SQLPLUS prompts ORA-12560 protocol adapter error (win environment) (1) check whether the Database Listener has been started: # Lsnrctl status # Lsnrctl start # Lsnrctl stop   (2) check whether the database service has been started

Advantages and disadvantages of oracle stored procedures 1. the stored procedure can make the program execution more efficient and more secure. Because the process has been compiled and stored in the database after it is established, You need to

Oracle to_number () function learning 1, Converts a string to the NUMBER data type (convert a string to a numeric data type) TO_NUMBER ( [, , ]) RETURN NUMBERselect to_number ('123') from dual; to_number ('123') 00001228 select trunc (to_number ('12

[One Moss per day]-Troubleshooting: High CPU Utilization (164768.1)-Series 3 these two processes are usually related to IO, but when there is an operating system problem, the two processes may "spin (wait)" until the IO operation is completed. This

Oracle 11g 11.2.0.1 setting HuagePage causes TRC to become larger and more recently found diag /.... the size of the sid_ora_xxxx.trc file in the/trac/directory is 11 mb and the number of similar files is large. as a result, 8 GB of hard disk space

Character Set garbled summary query current database Character Set BYS@bys1>select userenv('language') from dual;USERENV('LANGUAGE')----------------------------------------------------AMERICAN_AMERICA.AL32UTF8BYS@bys1>select * from