Oracle

In the dedicated connection mode, the server establishes a connection with the client for every client request to connect to the database server. This connection is used to process all requests of the client, until the user actively disconnects or

301. V $ BUFFER_POOLDisplays information about the instance buffer pool.302. V $ BUFFER_POOL_STATISTICSDisplays information about the instance buffer pool.303. V $ CACHEContains the header information of each block in the SGA of the current instance.

Deleting duplicate records in the database has always been annoying. I have collected methods for quickly deleting duplicate records from Oracle and SqlServer for your reference. I hope this will help you. SQL SERVERPresumably, every SQL SERVER

Oracle 10 Gbit/s provides powerful cross-platform database migration functions to migrate oracle databases between different architectures and operating systems! However, endianess must be the same, and different endianess may be migrated between 11

Oracle numeric operations use oracle SQL to perform the following operations on numbers: rounded up, rounded down, N decimal places retained, rounded down, and number formatted (rounded down ): select floor (5.534) from dual; select trunc (5.534)

SQL statement 1 for Oracle to delete duplicate rows and query and delete duplicate records. It is used to find redundant duplicate records in the Table. duplicate records are based on a single field (peopleId) select * from peoplewhere peopleId in

Red Hat database. profile file description # User specific enviroment and startup programsTMP =/tmp; export TMPTMPDIR = $ TMP; export TMPDIRumask 022 # ORACLE_HOSTNAME = dbs1; export ORACLE_HOSTNAME ORACLE_BASE =/u01/app/oracle; export ORACLE_BASE ##

Java code for creating an auto-increment field by oracle sequence trigger -- create table TEST (id number (9), name varchar (30 )) -- create squence create sequence TEST_SEQUENCE minvalue 0 maxvalue 999999999999999999999999999 start with 4 increment

Oracle redo corruption handling if only INACTIVE redo is damaged, there are three ways to restore: 1. clear logfile commands: alter database clear logfile '/database/oradata/skyread/redo04.log '; -- the archived operation alter database clear

Oracle commonly used query SELECT * FROM Dba_Users -- View All users SELECT * FROM user_all_tables -- query the current user tablespace SELECT * FROM user_source -- Query all functions and stored procedures SELECT * FROM v $ session -- view the

Database migration command memo NameValue view tablespace and position select. tablespace_name, B. file_name,. block_size,. block_size, B. bytes/1024/1024 "Sum MB" from dba_tablespaces a, dba_data_files B where. tablespace_name = B. tablespace_name;

Introduction to Data Guard-related parameter description about attributes of arguments parameters the value of n ranges from 1 to 31 in 11g. The following are the attribute values of the parameters) u COMPRESSIONu DB_UNIQUE_NAMEu DELAYu LOCATION and

Oracle manual full recovery case (archive mode) before doing the case, first view the v $ archived_log record, find too many, consider clearing these archives and then generate some and then experiment. Deleting these archives on the operating

SQLPlus usually has four connection methods. sqlplus / as sysdba  Operating system authentication does not require the database server to start listener or the database server to be available. For example, if you want to start the database, you can

Oracle trace file 11g: Oracle alter file before 11g is in the bdump directory. Oracle 11g provides Alert logs in XML and traditional text formats. The location of the new oracle 11g log is determined by the Automatic Diagnostic Respository (ADR. You

[Oracle]-[sqlplus/as sysdba logon Error, sqlplus/as sysdba returns an error, which is strange, so it is simulated in its own VM. A test user is created: [test@liu bin]# ./sqlplus Error 6 initializing SQL*PlusMessage file sp1.msb not foundSP2-0750:

Oracle Database Chinese Character sorting needs to be sorted by a certain Chinese field of a table in oracle Database today. It seems quite simple, not just order, however, it was not right after writing the findings, and it was incredible for a

In Oracle, logical export Exp/import Imp import/export is the oldest two command line tools in ORACLE. In fact, I never think Exp/Imp is a good backup method, the correct statement is that Exp/Imp can only be a good dump tool, especially in small

Oracle viewing user objects 1. Users View the current user's default tablespace SQL> select username, default_tablespace from user_users; view the current user's role SQL> select * from user_role_privs; view the system and table-level permissions of

Functions with null operation data (oracle version) The comprehensive data type function NVL (expr1, expr2) returns expr1 if expr1 is not null. If expr1 is null, expr2 is returned. The data types of the two expressions must be the same. NVL2 (expr1,