Oracle

This article describes how to use simple CDC for Oracle ODI 12c. It is the simplest kind of CDC. In this mode, each CDC table change is captured independently, and there is no need to consider data consistency between multiple tables with primary

As Oracle's just starting to learn, I'm sure you'll meet this problem.Obviously is the Navicat visualization created the table, but just can't find! Why is this?select * from user;However, we assume that the user is not the same as the

It is useful to look at the connection of the data, finish writing the program while testing the code side to see the release of database connections to help optimize the analysis of a robust system program.1. View the current number of database

The permission system of Oracle database is divided into System permission and object permission. System permissions (Database system privilege) allow the user to execute a specific set of commands. For example, the CREATE TABLE permission allows a

A stored procedureA stored procedure is a precompiled collection of SQL statements and optional control-flow statements, stored as a single name and processed as a unit. Establishing stored procedures on ORACLE server can be called by multiple

I. SummaryThere are three standard modes of backup and recovery for Oracle, broadly divided into two broad categories, backup recovery (physical), and import and export (logically),Backup recovery can be divided into non-archive mode

SELECT * from Scott.dept;SELECT * from Scott.emp;--dual is a virtual table provided by OracleSelect Length (' Hello ') from dual;--Common functions--lower uppercase to lowercase upper lowercase to uppercaseSELECT * from Scott.emp where ename= '

1.sysdate returns the current date.2.add_months (D1,N1) returns a new date based on the date D1 plus N1 months.Select Sysdate,add_months (sysdate,3) Hz from dual;3.last_day (D1) Returns the date D1 the last day of the month on which the date is

SELECT * FROM A_matrix_navigation_mapwhere rowID not in (select rowID from A_matrix_navigation_map where rownumThe second type:SELECT * FROM (SELECT a.*, RowNum R from (SELECT * from A_matrix_navigation_map) A WHERE rownum ) B WHERE r > 0Third

Difference:1. The length of the char is fixed, and the length of the VARCHAR2 is changeable, for example, storing the string "abc", for Char (20), which means that the characters you store will account for 20 bytes (including 17 null characters),

When configuring a new database, you need to configure the listener to put some information in, find TNSNames when the changes, the file can not be saved, save the prompt to save as.Later on the Internet to find information, this phenomenon may be

First login to the administrator account, or a user with DBA authority, followed by:--Query All users SELECT * from Dba_users; --Create new users Create user gpmgt identified by GPMGT; --View all user tablespace Select

In the previous article on the use of the two functions of Lpad and Rpad, the two other functions that today find the opposite meaning are LTrim () RTRIM ().This time pick LTrim () This function to say:The specific syntax format is as follows:LTRIM (

Many online tutorials, but generally older, worried about the new version of the changes, so personally tested, the recording process is as follows:First, the environmentCentos7.3 192.168.56.104Oracle is installed under Windows, 192.168.56.101Second,

Work often meet a lot of demand is this, according to the conditions to summarize some fields, such as I encountered is, our company has three investment platform, the same customer with a mobile phone number in three platforms are registered, but

Oracle sysdate addition/subtraction code instance, oraclesysdateAddition Select sysdate, add_months (sysdate, 12) from dual; -- add 1 year select sysdate, add_months (sysdate, 1) from dual; -- add January select sysdate, to_char (sysdate + 7,

Oracle and mysql migrate from one another Recently, some of my friends have encountered some problems. How can oracle be converted to mysql? Today, I am here to teach you how to switch   First, you need to download a tool navicat premium. (If you

Explain the Oracle SQLPlus runtime environment, common Oracle System Function instances, and sqlplus instances 1. Introduction to the SET command Set command sets the running environment of SQL * Plus. The syntax FORMAT OF THE set command is: SET

Step 1: Create a tablespace and assign permissions to users in the oracle database Log on to the oracle database as an administrator 1. Create a temporary tablespace Select name from v $ tempfile; find the temporary tablespace of the current

Oracle index creation and SQL optimization tutorial, oraclesql Database index: The index has a single column index compound index. If a field in a table has primary key constraints and uniqueness constraints, Oracle automatically recommends a