Oracle

Oracle Sometimes the user password contains some special characters directly logged in will be error, you need to use the following methods to log in SqlplusSqlplus ' username/"password"PS: The whole is enclosed in single quotation marks, strings

Transferred from:http://www.educity.cn/shujuku/404120.htmlAfter successfully installing the Oracle 11g database, you will find that your computer is running slower, that your computer is running faster with a lower-profile PC or even a very

SQL Server default port number is: 1433URL: "Jdbc:microsoft:sqlserver://localhost:1433;databasename=dbname"DriverName: "Com.microsoft.jdbc.sqlserver.SQLServerDriver";MySQL default port number is: 3306Url:jdbc:mysql://localhost:3306/test?

1, first, we can first create their own user table space, the format of creating table space is as follows:Create Tablespace Test (the name of the tablespace)DataFile ' D:\oracle\product\10.2.0\userdata\test.dbf ' (this side can be written under one

Select t.* from (select a. *, Row_number () over (partition by required to group fields order by update time desc) RW from table a) t = 1 Row_number () over (partition by col1 ORDER by col2) indicates that, according to col1

The database server character Set select * from Nls_database_parameters, which is derived from props$, is the character set representing the database. 　　Client Character Set environment select * from Nls_instance_parameters, which originates from

ObieeRPD: Define the subject angle of the different analysis, determine the corresponding fact table and dimension tableReport Surface: Select the required dimensions and measures, select the desired data according to the filterVisualize: Display

Environment: RHEL 6.4 + Oracle 11.2.0.4 1. Copy missing files 2. Compiling bbed 3. bbed Use test Reference 1. Copy missing filesThere are a few related files missing in 11g, but we can actually copy the relevant files from 1

Oracle Data typesWhen you create a table, you must specify the data type for each columnThe following are categories of Oracle data types: Oracle Primary Data typesCharacter Data TypesChar: fixed-length alphanumeric value, can be 1-2000 bytesVARCHAR2

Oracle Flashback TechnologiesWith the addition of the Flashback query technology in Oracle 9i, the flashback query provides a simple, powerful, and completely non-disruptive mechanism for recovering from human error in the database. With a flashback

--View the relationship between the user and the default table spaceSelect Username,default_tablespace from Dba_users;--View the tables that the current user can accessSELECT * from User_tables;--oracle Querying user tablesSELECT * from

(1) des cryptographic functionsCreate or Replace functionEncrypt_des (P_text varchar2, P_key varchar2) return varchar2 isV_text varchar2 (4000);V_ENC varchar2 (4000);Raw_input RAW (128);Key_input RAW (128);Decrypted_raw Raw (2048);BeginV_text: =

Operating Environment: Install the test on your own laptop (WIN10)Operating system version: 64-bit win8.1Oracle version: 64-bit Oracle 11gAfter installing Oracle successfully//log in as Administrator to OracleEnter the command in CMD sqlplus/as

PHP connection to the Oracle database, its query, update, delete data and similar to MySQL, but add data, especially the picture of the time is very different, which involves the creation of a Blob object, with the Blod object to save the PHP image,

Data dictionaryFirst, what is a data dictionaryA data dictionary is a collection of tables and views that Oracle stores all instance information. The Oracle process is in the SYS modeMaintain these tables and views, that is, the owner of the data

There are three types of exception errors:Pre-defined (predefined) errorsThere are approximately 24 pre-defined exception cases for Oracle. The handling of this exception does not have to be defined in the program and is automatically raised by

Import database files to an Oracle database under LinuxExecute statement: Imp C # #root/123456 file=/home/oracle/dbf/crm.dmp ignore=y full=y;Error: IMP-00003: encountered ORACLE error 6550ORA-06550: Line 1th, column 199th:PLS-00103: the symbol

Address:Http://otndnld.Oracle.co.jp/document/products/oracle10g/102/doc_cd/Java.102/B19275-03/datacc.htm#BHCJBJCC SQL data Type JDBC Type Code standard Java type types of Java extensions for Oracle

1. command to create a databaseDbca-silent-createdatabase-templatename general_purpose.dbc-gdbname fpcsdb2-sid fpcsdb2-responsefile No_value-raco Nenode-raconenodeservicename Fpcsdb_s-characterset Zhs16gbk-policymanaged-serverpoolname

basic syntax and examples:1. EXP: There are three main ways (full, user, table)1. Complete:EXP System/manager buffer=64000 file=c:\full. DMP full=yIf you want to perform a full export, you must have special permissions2. User mode:EXP sonic/sonic