Oracle

Regular tablespace:Create smallfileTablespace "camcdc"LoggingDatafile'E:/camcdc/camgj1.ora 'size 10000 m,'E:/camcdc/camsp_2.ora 'size 10000 m,'E:/camcdc/camsp_3.ora 'size 10000 m,'E:/camcdc/camsp_4.ora 'size 10000 mExtent management local segment

The solution is actually very simple, as long:Alter user identified by ; after this operation, it returns to normal. The following is a simple test: SQL> conn HR/hrerror: ORA-28002: the password will expire within 2 daysconnected. SQL>

Oracle10g provides the recycle bin function similar to the operating system. When you drop a table, you only need to rename it and put the table and associated objects such as index and constraint in the recycle bin. If you find that the table is

First, we need to clearly understand how we know that indexes are not used in an oracle SQL statement. By displaying the execution plan of SQL statements, you can know how the entire SQL statement is executed step by step in Oracle.Second, analyze

Statement: although the title is Oracle, it is also suitable for MySQL InnoDB indexing. In most cases, compound indexes are better than single-field indexes. Many systems rely on the creation of some suitable composite indexes to greatly improve

Complicated and complex execution plans, developer eyes may be lost, resulting in a sexy and silly SQL statement running on the server. There are a few important parts here, as for others, of course, not to be polite ,, (I) Number of returned rows

Oracle-related processes can be divided into user processes and Oracle processes. Oracle processes can be divided into server processes and background processes. Server processes can be divided into dedicated server processes and Shared Server

(I) view and release IPC Resources [Root @ David ~] # IPCS-M ------ shared memory segments -------- key shmid owner perms bytes nattch status ...... 0xbe3bb918 5439503 Oracle 640 419438592 22 [root @ David ~] # IPCS-m-I 5439503 shared memory

The merge statement is a new syntax of Oracle9i, used to merge update and insert statements. The insert statement cannot be executed when update is performed on the matching connection conditions. This syntax only requires one full table scan to

In previous articles, I introduced how to use struct to input multiple pieces of data to Oracle at a time in a Java program. As we all know, at the end of the SQL statement, we need to make an explain Plan to ensure that there are no statements that

InHow to use struct in a Java program to transmit multiple data records to Oracle at a timeThis section describes how to import multiple pieces of data to Oracle at a time by defining struct and array. Step 1: define the object type.Create type

To reduce the number of connections to the Oracle database, multiple data entries need to be input into the Oracle storage process as variables at a time. The method is as follows: Step 1: define the object type.Create type department_type as object

1: Description of Oracle Database Files 2: Oracle Doc definition of control file 3: three methods for searching ORACLE data files 4: FAQ A control file is a small binary file that is part of the Oracle database. It is used to record the database

The system has a table that is not used. If you want to delete the table or delete the data in the table, SQL> drop table testtable;Error at line 1:ORA-00054: Resource busy and acquire with Nowait specified The resources are busy, requiring Nowait  

Motivation: You want to use an SQL statement in Oracle to directly perform insert/update operations. Note: When writing SQL statements, we often encounter a large number of insert/update statements at the same time, that is, when there is a record,

1. Create the/etc/rc. d/init. d/Oracle10g script file as the root user. The content is as follows (the environment variable settings are modified according to the actual situation ): #! /Bin/bash## Chkconfig: 35 95 1# Description: init script to

1. View All Users:Select * From dba_users;Select * From all_users;Select * From user_users; 2. view system permissions of users or roles (system permissions assigned to users or roles ):Select * From dba_sys_privs;Select * From user_sys_privs;   3.

Comparison of common functions of SQL Server and Oracle 1. absolute value S: Select ABS (-1) value o: Select ABS (-1) value from dual2. INTEGER (large) S: Select ceiling (-1.001) value O: select Ceil (-1.001) value from dual3. INTEGER (small) S:

The Oracle database uses the sqlnet. authentication_services parameter in the sqlnet. ora file, remote_login_passwordfile In the parameter file, and pwdsid. ora parameter file to implement identity authentication. Sqlnet. authentication_services =

Technical points: 1.1 dbms_obfuscation_toolkit.md5Dbms_obfuscation_toolkit.md5 is an MD5-encoded data packet function, but an error message is displayed when select dbms_obfuscation_toolkit.md5 (input_string => 'abc') A from dual, it seems that this