Oracle

The most commonly seen restore operation is to restore all tablespace and data to the same point in time, whether it is a recovery point or not. Tspitr, however, is to restore a table-space content to a specific recoverable point in a single table

　　VM Virtual Machine installs Oracle 11gR2 on a 64-bit system, and there are two issues encountered during installation, and none of the 6.2 and 6.6 installations are RHEL7.0. Specific reasons for not knowing.1. Error in invoking target ' install '

Ha, which only monitors and manages the database at the operating system level, is generally used only for single-instance databases. The advantages are convenient management, convenient application development (developer convenience), and less

First, IntroductionToday executes an SQL statement using an Oracle client1 Select from where Ten Colname3The result has always been prompt indicator is invalid, thought that it is the column name is wrong to open the table column, a letter a letter

Creating tables and primary foreign keysCREATE TABLE sc_district ( ID number () not NULL, parent_id number (Ten), NAME VARCHAR2 (255 BYTE) Not NULL); ALTER TABLE sc_district ADD ( CONSTRAINT

Flashback table Test_drop to before drop;Test_drop: The watch that was mistakenly deletedThe blogger wrote this profound lesson with a heart of remorse:1) do not casually play drop table;2) This command is really able to recover, looks intact;3)

in an Oracle database, each relational table is made up of many columns. Assign a specific data type to each column to define the data type that will be stored in this column. 1, CHARA maximum of 2000 characters or bytes can be stored in a

5. NumberUsed to store 0, positive, fixed-length negative numbers, and floating-point numbers. The number data type can be in number (P,s)form to define the precision and range of the numbers. Here: P represents the precision (1-38), which

9. TIMESTAMP with Time ZONEContains all the fields in the TIMESTAMP data type, plus two additional fields: Timezone_hour and Timezone_minute. This data type contains information about the time zone that is supported. This data type can be used in

18, NCLOBYou can use a character set defined by the database international character set to store character-based data that is only Unicode type. You can store up to 4GB of data, which is larger than the maximum data that can be stored in the ORACLE1

Reprinted: 2015-01-17 15:32:33Http://www.cnblogs.com/FeiyueHang/archive/2011/03/08/1977729.html1.NVL (EXPR1,EXPR2)If EXPR1 is null, the function displays the value of EXPR2;2.NVL2 (EXPR1,EXPR2,EXPR3)If the value of EXPR1 is null, the function

Create or Replace procedure Testwzm (V_GDJDM in varchar2) isv_id VARCHAR2 (10);V_xlname varchar2 (100);V_count number (4);Beginv_count:=0;Defining cursorsDECLARE CURSOR line_cur isSelect Line_code,line_name from Ods_yx.line where GDJDM=V_GDJDM and

The previous article recorded the C # Implementation of SQL Server 2005 and Oracle two database synchronization tool, today when the tool is copied to the server running when the synchronization of Chinese characters into garbled, Baidu after a few

Oracle BIEE can pass parameters through the narrative view to achieve the effect of controlling embedded page content with hints.① first, build a request condition (Answer) that requires passing parameters.② Select narrative View and insert the

First, the query encoding format:Select Userenv (' language ') from dual;Second, set the encoding format to UTF-8(1)--View the Oracle database character set first:Select Userenv (' language ') from dual;Query Result:Simplified Chinese_china. Al32utf8

Fortunately, I was recommended to participate in the Oracle Yep program, although compared with you, my actual experience and ability still have a lot of shortcomings, but at least a kind of encouragement to myself, adhere to the interest, adhere to

constraint type Constraint_type in table all_constraints:C (check constraint on a table)--constraints, such as not Null,checkP (primary key)--primary keyU (unique key)-Unique key constraintR (referential integrity)--foreign key--The following two

Oracle12cRAC modify SCAN Configuration Check the SCAN modification in 12c. The modification includes two aspects: (1) modify the SCAN name. (2) modify the IP address of SCAN.   If SCAN in/etc/hosts is used, you only need to modify the hosts file. If

Principles and usage of oracle packagesPackagePackage definition:A package is an encapsulation package for objects such as related procedures, functions, variables, cursors, and exceptions. It consists of two parts: specification and

OracleGateway11gR2 access heterogeneous database (DB2) configuration document Directory1. Prerequisites 2. Download transparent gateway 3. Unzip and install transparent gateway 4. Install the DB2 client program 5. Configure Client Connection 6.