Oracle

Purpose of a multitenant environmentA multitenant environment enables the central management of multiple PDBs in a single installation. By using a multitenant environment, you can accomplish the following goals: Cost reductionBy consolidating

First step: Connect the server, enter SqlplusStep Two: Login as SysdbaStep three: View and modify processes and sessions parameters1. View processes and Sessions parametersSELECT * from V$resource_limit; More convenient to view process and

Pfile (parameter file) is used from oracle8i and can be used in oracle9i. It is in the form of a text file, you can use the VI and other editors to modify the database parameters. The file format is Initsid.ora. Oracle 9i establishes a pfile for

How to download the grid software required for RACLogin to the OTN website after registering your accountLocate the "Server and Storage System" item at the download optionDrop-down menu found, Grid InfrastructureAfter entering, remember to click

First install Oracle Enterprise Edition or client lite. After that, you need to modify your Tnsnames.ora file to increase the database.My Oracle instance is ORACLE1 and placed in the D:\oracle\ directory. My IP address is 192.168.1.102.Modify the

When we create a table, Oracle creates a segment for us, that is, the table is equivalent to a segment, the first time you create a table, allocate a zone for us to use, the area is generally 8k size, each zone has 8 blocks, when the data is stored,

Both of these methods can be used in Sqlplus:EXEC pro_name (parameter 1:);Call Pro_name (parameter 1:);Difference:1. But exec is a sqlplus command and can only be used in sqlplus; call is a SQL command with no restrictions.2. When the stored

 First step, on the cmd command line, enter SqlplusStep two, follow the prompts to enter the user name and password1. View processes and Sessions parametersSql> Show parameter processesNAME TYPE VALUEDb_writer_processes Integer

Blog Original: Using MyBatis to execute Oracle stored procedures Stored procedures are not used in small companies, but if the business is complex or the performance requirements are more stringent when the stored procedures come in handy, some of

Oracle MinuskeywordMinuskeyword in SQLThere is a minuskeyword in SQL that uses two SQL statements to find out the results of the first SQL statement, and then see if the results are in the results of the second SQL statement. If there is, then this

Vi/home/oracle/.bashrcUmask 022Oracle_base=/usr/lib/oracleOracle_home= $ORACLE _base/11.2/client64Path= $ORACLE _home/bin: $PATHLd_library_path= $ORACLE _home/libTns_admin=/usr/lib/oracle/11.2/client/network/adminExport ld_library_path oracle_base

Oracle Table Replication1>create table ... as select:, the table does not exist, and the tables are created and the data is copied. Use this statement in cases where the table does not exist in the oralce.CREATE TABLE newtable as SELECT * from

Note: Because LOB fields have separate LOB segment to store, it is not possible to query only dba_segments for tables with LOB fields.The following script comes from:How to Compute the Size of a Table containing Outline clobs and blobs[article ID 118

Oracle 11gR2 real-time client configuration (Windows) 1. Download the real-time client that suits your system first. You can download the client from the address below. Http://www.oracle.com/technetwork/database/features/instant-client/index-097480

Detailed description of the use of RECORD, VARRAY, and TABLE in ORACLE1 Note 1.1 RECORD Define the record data type. It is similar to the STRUCTURE in C language. PL/SQL provides a holistic approach to combine several related, separated, and basic

When the network of the master and slave databases in the OracleGoldenGate environment is suddenly interrupted, the dp process on the master end cannot be started.View report dpfull, the phenomenon is/gg/ggs/dirdat/aa000053 (no surch file or

Oracle memory management (Part 2) [In-depth analysis-eygle] Study Notes 1.2.2 UGA and CGA UGA is composed of user session data, cursor status, and index area.In Shared Server mode, a Shared service process is Shared by multiple user processes. At

Oracle memory management (Part 4) [In-depth analysis-eygle] Study Notes1.3 SGA Management SGA refers to the System Global Area. It is a memory Area used to load data, objects, and save running status and Database Control information. It is allocated

Oracle memory structure (part 3) [In-depth analysis-eygle] Study Notes1.2.3 PGA management: sys@felix SQL>show parameter area_size NAME TYPE VALUE------------------------------------ -----------------

Oracle memory management (one) [In-depth analysis of oracle-eygle] Study Notes 1. Memory Management The memory used by the ORACLE database mainly involves two aspects: PGA and SGA.1.1 PGA Management PGA refers to the Program Global Area, which is a