Oracle

The Oracle tutorial you are looking at is: Use and maintenance of Oracle password files. Summary: Oracle relational database system is widely used for its excellent performance, and ensuring database security is an important part of database

The Oracle tutorial you are looking at is: Oracle performance optimization. We have reason to believe that the new kernel version (2.2.16-3 SMP) should also have a performance boost: Os2:newer minor version kernel TPC Results Load time (Seconds) 9.4

A recent project has a need for a regular expression in an Oracle database that requires a non-Chinese character other than a number or letterReplace all characters except letters, numbers, kanji with null if you have the following fields' Asdfsad,,;

First define the several parameters that the paging statement will use: int currentpage; Current pageint Pagerecord; Show number of records per page Take the previous AddressBook datasheet for example (10 records per page): One, Sqlserve download

Deleting a nonexistent table in Oracle, such as DROP table TableName, prompts: ORA-00942: Table or view does not exist Executing the statement in a program will report an exception, which requires us to determine whether the table exists before

1. View Deadlock1 Execute the following statement with the DBA user Select Username,lockwait,status,machine,program from v$session where SID in (select session_id from V$locked_object ) If there is a result of the output, then there

1. To optimize the query, you should try to avoid full table scan, first consider the where and the order by the columns involved in the establishment of the index.2. The null value of the field in the WHERE clause should be avoided as far as

This article illustrates the way Oracle deletes users and tablespaces under Linux. Share to everyone for your reference, specific as follows: 1. Delete a user sql> conn/as sysdba Connected. sql> drop user userName cascade; User has

This article analyzes the Oracle database user creation method under Linux. Share to everyone for your reference, specific as follows: 1 login to Linux, login with Oracle (if root is logged in, switch to Oracle user after login with su-oracle

Oracle group statistics by different time SQLAs shown in the following table table1: Date (exportdate) Quantity (amount) -------------- ----------- 1 April-February -08 October-March -08 2 1 April-April -08

I used to write simple UPDAET statements, such as Updae table set c1= ' XXX ' There is a problem with data revisions today, the project background is as follows, there is a table A, there are two fields A1,a2 also has an associated table B, which

Today mentor gives a task for optimizing SQL statements. (Environment is SQL Developer) One statement executes slowly, the query results in 17,544 records, but it takes 970 seconds and is slow. The statement is like this: SELECT DISTINCT '

Specifically for RowNum it is an Oracle system sequence that is assigned the number of rows returned from the query, the first row is assigned 1, the second row is two, and so on, this is the number of rows that the field can use to limit the return

For specific details, see Code Analysis below. --Query executing SQL statement SELECT osuser Computer login, program to initiate the request, USERNAME login system username, SCHEMANAME, b.cpu_time spend Cpu time, STATUS, B.sql_text execution

The Oracle tutorial that you are looking at is Oracle Dynamic Cross table generation. Oracle is the most widely used large database, and in the paradigm of Oracle database design can greatly reduce data redundancy, so that the database maintenance

The Oracle tutorial being looked at is the space management technique for Oracle databases. In an Oracle database, DBAs can make possible adjustments by observing a certain table or view to see how the current space is being used. I. Free space in

The Oracle tutorial you are looking at is: Oracle contrast analysis scripts between different databases. Oracle database development applications often have such a need for database administrators, compared to two different instances of the object

Restart Oracle databases and listeners under Linux: Method 1: Log on to Linux with root, open the terminal and enter the following command: CD $ORACLE _home #进入到oracle的安装目录 Dbstart #重启服务器 Lsnrctl Start #重启监听器 CD $ORACLE _home #进入到oracle的安装目录

1, in the construction of the library, Catproc must run, otherwise use Rman will appear the following character set error: Rman-00554:initialization of internal Recovery manager package failed Rman-04005:error from Target

If you want to reprint, please specify the source, thank you! Take 8.1.7.4.0 as an example to illustrate: 8: Version number 1: New feature version number 7: Maintenance Version number 4: The normal patch set number 0: Special platform Patch Set