Oracle

The Oracle driver first goes to the official website to download, after downloading, needs to install to the MAVEN local warehouse, then adds the dependency in the Pom.1 Download the Oracle Driver packOjdbc6-11.2.0.3.jar2 command line installation

The parameters of the tuning function in the Oracle database system are called initialization parameters, and the database administrator needs to properly adjust these initialization parameters to optimize the Oracle system according to the actual

1, by default, ORACLE log files are recorded in the $oracle/rdbms/log directory [Email protected] log]$ pwd /home/oracle/oracle/product/11.2.0/db_1/rdbms/log Log file is (Alert_.log): [email protected] log]$ LL Total 84

1. First create a tableSQL code[SQL]View PlainCopy Create table TE ( ID VARCHAR2 (2), T_code VARCHAR2 (4), T_name VARCHAR2 (4), T_amount INTEGER, T_dept VARCHAR2 (4), T_project VARCHAR2 (4), T_type VARCHAR2 (

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

1. Take the Windows operating system as an example, open a command prompt, enter the command sqlplus/nolog, enter the Oracle console, enter Conn/as sysdba, and enter in the DBA role.2. After the connection is successful, enter "Select username from

Recent work has encountered a performance-related problem, broadly described: The process of bulk task execution caused the database SQL execution time is too long, after the view is due to the bulk task full database connection pool caused, as to

Recently asked to develop when the data table changes when the need to call the Web interface, the Internet to find a number of articles to look at it is not very good, but also according to other people's ideas to achieve the next, the feeling is

First, what is synonymous　　Synonyms are aliases of objects that are preceded by an object that simplifies SQL statements, hides the names and owners of objects, and provides public access to objects. There are two types of synonyms, the public

Oracle query table information, including table name, field name, field type, primary key, FOREIGN key Uniqueness constraint information, index information query SQL as follows, we hope to help:1, check out all the user tablesSELECT * FROM

SelectOper_time, Micropay, REFUND from ( Selecttrunc (oper_time) oper_time, class_name, sum (total_fee) Total_fee fromWx_pay_detail GROUP by Trunc (Oper_time), class_name) pivot (sum (total_fee) forClass_nameinch ('Micropay' as

single-line functionWhole the essence of SQL:Select statement + single-line function (back)String FunctionsThe usual functions for working with strings are as follows : No. Name of function Meaning 1 UPPER (

A String type1 CONCAT (A, B) two field AB connections2 a| | B field connection, you can connect multiple3 Length (char \ varchar2) return string lengths4 LOWER All Letters lowercase5 UPPER All Letters capitalized6 Initcap uppercase, the remaining

Some databases are in use because some operations will lead to a temporary table space is too large, due to the working mechanism of temporary table space, the temporary table space will not be released after the job is completed.This problem can be

Https://www.cnblogs.com/AmatVictorialCuram/p/5904914.html PromptOutput hints Set Feedback offUsed to turn off the output hint information, when there are a large number of execution statements, often turn off the "Output

Sql_trace is a very good tracking tool provided by Oracle, primarily used to check the database for anomalies, and to track the activity of the database to find the problematic statement.First, overview:Sql_trace is a very powerful tool for Oracle.

Win+r Investigation Run window, enter CMD returnConnect to a local Oracle libraryCreate a tablespace named "SXSJ" with an initial size of 512M and support auto-scaling with 32M increments per increment;Create tablespace sxsj datafile '

Oracle Database System Structure explanation, oracle System Structure 1. oracle databaseDatabase Storage StructureAndDatabase instanceIt consists of two parts. Where,Storage StructureIncludingPhysical storage structureAndLogical Storage

20171000011201_disable inbound_connect_timeoutset.txt, 20171000011201_disable inbound_connect_timeoutset.txt-- // Read the previous post in the morning, found the link: http://www.itpub.net/thread-2066758-1-1.html-- // Let's take a closer look at it

How to change the data file location of a tablespace in Oracle Table space Overview Oracle tablespace is a logical space used to store database objects (such as data files) in Oracle. It is the largest logical unit for storing information in Oracle,