Oracle

The content of this lecture includes:Use optimizer statisticsManage automatic workload ArchivesAutomatic database performance diagnosis and monitoring (ADDM)TermsAutomatic Workload Repository (AWR): Infrastructure for data gathering, analysis, and

1. Create a test table SQL code Create table Account ( CardId char (20) primary key, -- account Name char (20) not null, -- name Money numeric (20, 2) -- deposit ); 2. input test data SQL code Insert into Account values ('20170101', 'zhang san', 0001

1. Create a test tableCreate table Account (CardId char (20) primary key, -- accountName char (20) not null, -- nameMoney numeric (20, 2) -- deposit);2. input test dataInsert into Account values ('20170101', 'zhang san', 0001 );Insert into Account

ORA-00600: internal error code, arguments: [keltnfy-ldmInit], [46], [1], [], [],SQL Virtual MachineAn error is reported when the database is started: SQL> conn/as sysdbaConnected to an idle instance.SQL> startupORA-00600: internal error code,

-- Add_months (d, n): returns the date and time corresponding to n months after or before the specified date and time. N is a positive integer, and n is a negative integer.Select add_months (sysdate,-5) from dual; output: 2010-08-26 13:24:28 --

As the saying goes, to do a good job, you must first sharpen it. A good tool is also required for database performance analysis. Statspack is a powerful and free performance analysis tool provided by oracle.To install statspack, you must have sysdba

Related configuration before installing oracle Database in linux;# Root#/Etc/sysctl. confCp/etc/sysctl. conf/etc/sycotl. confbackupEcho kernel. shmall = 2097152>/etc/sysctl. confEcho kernel. shmmax = 2147483648>/etc/sysctl. conf# Semaphores: semmsl,

Start Oracle's help system-no longer afraid of forgetting commands. When you perform database management, you can't remember commands and syntaxes, especially for demonstration or on-site implementation, there is no way to check the manual. It is

Oracle function return table Type 1. Use a custom type to implement 1. Create a table object type. To return a table object in Oracle, you must define a table type as follows: SQL code create or replace type type_table is table of number, when using

Traverse the joined array index by varchar2 -- The string sequence should be declare type t is table of number (3) index by varchar2 (3); hash_t t; l_row varchar2 (3); begin hash_t ('A '): = 10; hash_t ('B'): = 20; l_row: = hash_t.first; while

Use DBMS_REPAIR to fix Bad blocks. 1. Procedure_Name Description ----------------- revoke ADMIN_TABLES Provides administrative functions (create, drop, purge) for repair or orphan key tables contained in the DBMS_REPAIR package. note: These tables

Oracle completely restores SYS @ orcl # shutdown abort from the backup control file; the ORACLE routine has been disabled. SYS @ orcl # oracle @ oracle :~ /Product/10.2/db_1/dbs> rman target/recovery Manager: Release 11.1.0.6.0-Production on

How to query data in oracle and modify the status at the same time In this case, you need to be able to query a batch of records and modify the Update Status of these records at the same time, so that the data being updated will not be obtained by

Query traversal: data must be stored in the base table in a hierarchical manner. For example, an organizational unit is such a typical example: Implementation statement: 　 Select column From table_name Start with column = value Connect by prior

How to use oracle rowid 1. Create a temporary tableCreate table test_rowid (id number, row_id rowid );2. Insert a row of recordsInsert into test_rowid values (1, null );3. Modify the inserted recordUpdate test_rowid set row_id = rowid where id = 1;4.

Oracle Database tutorial compilation Stored Procedure false In this case, if the Stored Procedure compilation is forcibly terminated, the Recompile stored procedure will find that it is still suspended. This is mainly because the session is INACTIVE

This article will summarize the solutions to the problem that sys cannot log on remotely. If you encounter such problems, please refer to them in detail. SYSDBA cannot log on remotely (does this mean CRT remote logon) SYSDBA cannot log on remotely

Creating and Deleting Users is a common operation in Oracle user management, but it implies the knowledge of the system and object permissions of the Oracle database system. Understanding the Authorized operations and principles of Oracle users can

This article summarizes a variety of operations on the number of connections in the oracle database, including viewing the number of connections, modifying the number of connections, and configuring the number of connections. Sometimes the client

There are many application projects. At the beginning, MYSQL Databases can basically meet various functional requirements. As the number of application users increases and the amount of data increases, MYSQL gradually becomes overwhelmed: the