Oracle

Oracle 's synonym (synonyms) is literally understood as the meaning of an alias, similar to the function of an attempt, a mapping relationship. This article describes how to create synonym statements, delete synonyms, and view synonym statements.

After the instance has been allocated the memory structure, loads the control file, then wants to open the database, needs to do the control file, the data file, the online redo log maintains the mutual state consistency, the database can open. When

1. View All Users: SELECT * from Dba_users; SELECT * from All_users; SELECT * from user_users;2. To view user or role system permissions (System permissions that are directly assigned to a user or role): SELECT * from Dba_sys_privs; SELECT * from

Database theory in the database user and database schema is not necessarily linked, detailed database schema interpretation can be found here:Http://stackoverflow.com/questions/2674222/what-is-purpose-of-database-schemaA database schema is

First, the database administratorEach Oracle database should have at least one database administrator (DBA), and one DBA is sufficient for a small database, but for a large database it may require multiple DBAs to share different management

First, an overview of the task map: The process is to first delete the files on HDFs with Thdfsdelete, then import the data from the organization tables in Oracle into HDFS, establish hive connection-"Hive Build Table-" Tjava Get system Time-"

The fast refresh mechanism for Oracle materialized views is done through materialized view logs. How Oracle can support a fast refresh of multiple materialized views through a materialized view log, this article simply describes how the refresh

--statistics on the sum of departments ' wages according to each departmentSelect DeptID, sum (SAL) payroll totals from the EMP group by DeptID;--statistics on the sum of departments ' wages according to each departmentSelect DeptID, Payroll total,

ORACLE :--Time Turn stringTo_char (sysdate, ' Yyyymmddhh24miss ')--String Turn timeSelect To_date (' 20140701125751 ', ' Yyyymmddhh24miss ') from dual--2014-07-01 12:57:51--Query tableSELECT * FROM all_tables WHERE table_name = ' {0} '--Query

To put it simply1, the structure changed, the original SOB is now called Ledger2, customer, supplier, tax raise a level3, customers, suppliers, banks changed to Web interface4, AR, AP can support the cross-ou query and input under one responsibility.

Installing the 32-bit Oracle client Instantclient-basic-nt-12.1.0.1.0.zip: http://www.oracle.com/technetwork/topics/winsoft-085727.html Download unzip to get "instantclient_12_1" file, copy "Instantclient_12_1" to "C:\app\oracle\product\12.1.0" (can

Creation and configuration of the ODI studio topology (Oracle) I. Conceptual interpretationTopology Manager is primarily used to manage the following 5 categories of tasks and store the information in the master repository for shared use by all

1.refresh:ifneeded (region)In a A.JSFF page drag a taskflow b,b taskflow need an input parameter, from A.JSFF corresponding manage bean to give this parameter value,Each time a page in the browser calls this B-Taskflow, the error will always be that

Preparation: 1, download the corresponding version of Oracle-instantclient (I here is 11.2.0.1.0)http://www.oracle.com/technetwork/database/features/instant-client/index-097480.html2. Installation-ivh oracle-instantclient11.2-basic-11.2.0.1.0-1.x86_6

(1)Select the most efficient table name order (only valid in the rule-based optimizer): The Oracle parser processes the table name from the FROM clause in a right-to-left order, and the last table written in the FROM clause (base table driving

Suppose we are now brewing a library, initially, we only have 10 books for everyone to read and buy. For 10 books, we might just need a bookshelf to hold it as a container for the 10 books, because anyone can easily take a glance at the title of the

The Oracle numeric data type can store a maximum of 38 bytes of precision. When converting an Oracle value to a common language runtime data type, there may be too many digits behind the decimal point, which can cause this error. Query 290,000 data,

Free and convenient Web application development framework for Oracle (1) APEX In general, APEX is the most convenient and efficient development framework I have ever seen. It is more comfortable to use than PHP. It was easy to get started, and the

PL/SQL Developer does not install a client to connect to a remote oracle database (for example, developeroracle)Labels ):Http://www.oracle.com/technetwork/cn/database/features/instant-client/index-092699-zhs.html2. Download and install PLSQL (around

How to install different oracle versions in windows1. Use set oracle_sid = *** to redirect between oracle instances of different versions. 2. You may not be able to log on to the oracle instance in different oracle_home, and the network/admin/sqlnet.