Database Administrator

Oracle RMAN does not completely restore the database to the specified time point (Simple simulation), and the test database is not completely restored Cmd> sqlplus/as sysdba; SQL> shutdown immediate SQL> alter database archivelog; SQL> conn squirrel/

Navicat Oracle features an intuitive GUI and provides powerful visualization tools such as query editor and syntax highlighting capabilities when previewing SQL, SQL console, text, hexadecimal and BLOB view/Editor, SSH tunnel and more to improve

By default, how long does the SCN increase? Today, my colleagues suddenly discuss this issue. The database version is as follows: SQL> select * from v $

Oracle uses ROUND and EXTRACT for date operations: SQL>SelectTo_char (sysdate,'Yyyy/mm/dd hh24: mi: ss')FromDual; TO_CHAR (SYSDATE, 'yyyy/MM/DDHH2 ------------------------------ 18:13:20 ROUND (d, [fmt]): returns a rounding date value in the

I recently found a problem with Oracle11g. I will discuss it with you. Is in Oracle 11.2.0.3 For Linux X64 environment. Check whether the database has the LOCK information. When querying the V $ LOCK view, we found that there was no response for a

Establish package specifications Create Or ReplacePackage emp_packageIs G_deptno number (3): = 30; ProcedureAdd_employee (eno number, ename varchar2, sal number, dno numberDefaultG_deptno ); ProcedureFire_employee (eno number );

Orabbix cannot obtain the solution for Oracle DB Size and DB Files Size These days, when studying Orabbix, I found that Zabbix could not obtain the Size of DB Size and DB Files. Later I found the problem lies in the configuration of

1. query the user's connection statusSelect username, sid, serial # from v $ session where username = 'maximo '; Username sid serial #--------------------------------------------------MAXOMO 22 1MAXIMO 142 1   2. delete one by oneAlter system kill

Combination of range partitions and hash partitions or list partitionsSyntax: PARTITIONBYRANGE (column_name1) SUBPARTITIONBYHASH (column_name2) SUBPARTITIONS number_of_partitions ( PARTITION part1 value less than (range1 ), PARTITION part2

When the Oracle database is remotely restored, it takes a lot of space and a long time to completely restore the entire database.If the mode-based recovery method is used to recover only all objects in a certain mode, instead of all the data, this

The ASM of Oracle 11G provides the features of volume groups and cluster file systems, and is fully compatible with the features similar to that of VxFS. Unlike the previous diskgroup, it truly has the ease of managing the file system. However, in

1. How to log on to the database through operating system authentication 1) The most basic method is to use "sqlplus/as sysdba" to log on to the database. Sqlplus/as sysdba The slash "/" indicates the user name on the left and the password on the

Oracle-based application systems have many performance problems, which are caused by poor SQL Performance of application systems. Therefore, SQL Performance optimization is very important, to analyze and optimize the SQL Performance, we generally

Oracle job Execute the following script in plsql to create a job that is executed at every night. Begin Sys. dbms_job.submit (job =>: job, -- job ID What => 'dbms _ output. pub_line (''asdf ''); ', -- execute the script Next_date => to_date ('17

Show status like 'handler _ read % '; Handler_read_first indicates the number of times the index header is read. If the value is very high, it indicates that there are many full index scans. Handler_read_key indicates the number of times an

1: uuid. hex: uses the 128-bit algorithm to generate a 32-Bit String. The most common method. Applicable to all databases. In *. hbm. xml Set as follows. 2: Specify parameters SEQ_CHILD 3: what follows is written by Tracylau,All classes are

The following article hopes to help you: 64-bit RHEL 5 installation of Oracle 11gR2 document Attach a scan and gns document Oracle 11gR2 gns scan vip configuration Add/delete document Record the problem if the gns service is not used. Instead, use

In many cases, some slow queries cause a lot of pressure on MongoDB. It took some time to write a script and kill some slow query operations. Var j = 0; Var _ DEF_TIME = 10;// Set the slow query time For(Var I in db. currentOP ().

A user is created in the database, which is used by a third-party system. The customer stressed that this user can only access limited tables within the scope specified by us. Therefore, I created a user, such as user_third, who only gave the

Recently, due to the need to study the problem of inserting data into the Oracle database in C #, Microsoft's built-in component ADO is usually used. NET to connect to and operate the database, which is also the easiest way to use, that is, add