Oracle

Pom.xml loading jar pack times wrong: Missing artifact com.oracle:ojdbc14:jar:10.2.0.4.0.Because of Oracle's OJDBC charges, there is no Ojdbc14-10.2.0.4.0.jar package when the MAVEN project is imported.Workaround:Configure the local library.

? Define subqueries? Describe the types of problems that subqueries can solve? List the types of subqueries? Write single-line and multiline subqueries? Subquery: Type, syntax, and guidelines? Single-row subquery: – Group function in a subquery –

Rman ( physical Backup)Rman-recover Manager Rman backed-up objects Data Files Data Files (Data File) Control Files Control Files (Control File) parameter File parameter File (Spfile/pfile)

There are Scott users in Oracle 10gAlter user Scott account unlock;Use the Scott password Tiger to enter, change the password, change the user has an EMP table;Rank function:SELECT deptno, Job, SUM (SAL),RANK () over (PARTITION by Deptno ORDER bySUM

At the same point, using drop Delete truncate will delete the contents of the tableDROP table NameDelete from table name (followed by the where statement, and all data in the table is also deleted)TRUNCATE TABLE nameDifferenceFirst, delete belongs

两种方法:-- 方法1.UPDATE表2SET  表2.C  =  (SELECTB  FROM表1  WHERE表1.A = 表2.A)WHERE  EXISTS ( SELECT1 FROM表1  WHERE表1.A = 表2.A)  -- 方法2MERGE INTO 表2 USING 表1ON( 表2.A = 表1.A )    -- 条件是 A 相同WHENMATCHED THENUPDATESET表2.C = 表1.B   -- 匹配的时候，更新Oracle Association

Reprint: http://www.cnblogs.com/xqzt/p/5034375.htmlFor those who are familiar with Oracle or who have contacted Oracle, Scott, the user, must be quite familiar with it. 12c has launched a pluggable database with multiple database PDB in the form of

You need to import the relevant jar package before accessing the database using a connection pool.First, you need to import the Oracle driver package, usually in the directory where the Oracle database is installed, there is a Ojdbc6.jar driver

1. Unzip the J:\ software \ (computer) Computer class software \oracle\plsqldeveloper\instantclient_11_2To product under the Oracle installation directoryC:\app\Administrator\product2, put the C:\app\Administrator\product\11.2.0\dbhome_1

The 1.date type stores data in the format of month-date seconds and minutes, and can be accurate to the secondThe timestamp type stores data in the format of month-day seconds and minutes, and can be accurate to nanoseconds (9-bit)2.date typeDate

The "preface" is explained in the blog post:This article will introduce the concept of server_name and instance name SID in Oracle by personal tone, and under the current time point "May 22, 2017 ", the level of technology is limited, there may be a

Read Catalogue 1. Preparatory work 2. Left outer connection (OUTER Join/left join) 3. Right outer connection (OUTER join/right join) 4. Full external connection (OUTER Join/full join) 1. Preparatory workOracle outer joins

Traditional enterprise databases such as banking and telecommunications are mostly based on Oracle Rac+dataguard's highly available architecture, and high-availability implementation and testing work is particularly important during the

Work, sometimes you need to copy files from ASM to the file system or, in turn, do some maintenance operations, this article describes 4 ways to copy files: CP command in Asmcmd (11g) Dbms_file_transfer Bag Convert or Backup as copy

--Create TABLE space and database files and default tablespace sizeCreate tablespace tablespace_test datafile ' E:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\DataBase_Test.DBF ' size 200m;--Set up automatic database growthALTER DATABASE datafile ' E:\ORACLE\

Oracle compares the maximum or minimum value of a column, and we use the Max and Min functions without thinking, but for the maximum or minimum of a row? is not the daily use of less, many people do not know that there are also built-in functions to

I. Basic information for Oracle apps and DB1. Application and Database environment:Application Node in Linux7.3Database Node on Linux 7.32. Oracle EBS Application version:R12.2.6 on Linux7.3 x_86 (64bit)3. Database information:Oracle Database R12.1.0

The multi-tenancy option, introduced in Oracle database, allows a single container database (CDB) to host multiple separate pluggable databases (PDB).This article simply demonstrates how to Plug a pdb,unplugging a PDB operation in CDB.One, plugged

Oracle Database 12CR2 (Project Combat II): Linux system Installation Oracle12.2First, the subject of the course: Wind Brother Oracle Database Tutorial 12CR2 (Project Combat II): Install Oracle12.2 on Linux operating system.Second,

CREATE Table StatementCREATE table [schema.] Table name (column datatype [DEFAULT expr][, ...]);Specify a default value for the column during the insertion... hire_date date DEFAULT sysdate,...The default value must satisfy the data type definition