Oracle

The content is based on the tablespace managed by LMT, and dictionary management is no longer needed. This article mainly verifies these problems: 1. There are two ways to allocate partitions in the tablespace managed by LMT:System allocation and

1. If it is just deleted, there are two methods: Run the show parameter undo command to view the current database parameter undo_retention settings. Shown as follows:Copy codeThe Code is as follows:Undo_management string AUTO Undo_retention integer 1

ORA-01002: fetch out of sequence Error locating: SQL>! Oerr ora 01002.01002,000 00, "fetch out of sequence"// * Cause: This error means that a fetch has been attempted from a cursor// Which is no longer valid. Note that a PL/SQL cursor loop//

How to collect AWRReport from Oracle Database (Copyright statement: If your original or translated articles need to be reprinted, or if they are used for personal learning, please indicate the source; otherwise, please contact me. violators must

Method 1: export using PL/SQL Developer:Menu Bar ----> Tools ----> Export Tables, for example, you can set relevant parameters: Method 2: export using the cmd operation command. The details are as follows:1: There is a tnsname. ora file in the

A deep understanding of Oracle Database startup and shutdown provides several different methods for starting and disabling Oracle databases. This article will detail the differences between these methods and their respective functions.　　1. Start and

The title is a bit complicated. In fact, the excel table is imported and exported in the replicel database. Let's take a look at the specific data import method. ExportFor export, select the query result from the query results in the SQL Window of

LOB (large object) is a data type used to store large objects. Each LOB can have 4 GB of data. Let's take a look at the oracle lob data type application instance, I hope this article will help you. LOB has three types: BLOB: Binary Large ObjectCLOB:

Chapter 2: Execution Plan in Oracle 2.1 What is a combination of the steps Oracle uses to execute the target SQL statement is called the execution plan. The execution PLAN can be divided into the following three parts: 1. The body of the target SQL

I. Preface: Oracle provides exp and imp commands for data backup and recovery. exp commands can export data from a remote database server to a local dmp file, the imp command can import the dmp file locally to a database server in a distance. This

1. View entries in tnsnames. ora: Bys3_dblk =(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP) (HOST = bys3.bys.com) (PORT = 1521 )) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = bys3) ) ) In/etc/hosts, the IP address of bys3.bys.com cannot be

To_date ('1970-11-11 ', 'yyyy-mm-dd') // specify a date in the formatInsert into kkk (myid, myname, mydept) select empno, ename, deptno from emp where deptno = 10; // row migrationUpdate emp set (job, sal, comm) (select job, sal, comm from emp where

I. IF-THEN statement The IF-THEN statement is the simplest IF statement. Syntax: condition ; Example: : v_score ;II. IF-THEN-ELSE statement Compared with the IF-THEN statement, the IF-THEN-ELSE statement provides program exceptions when the

Recently, I found that I was really weak in C ++. After reading the api documentation for a day, I finally sorted out the relationship between Some APIs of BDB, I hope that beginners will clarify the basic concepts of environments, handles, and

1. Use SQL * PLUS to stop a database $ Sqlplus/nolog SQL> connect/as sysdba SQL> shutdown [immediate] SQL> exit 2. Stop Listener $ Lsnrctl stop 3. Stop the HTTP service # Service httpd stop 4. Use su or log on to the root again (if you want to

Previously, I only talked about modifying the table structure in mysql. Today I will introduce some implementations of modifying the table structure in oracle, t-SQL, and MySQL. I hope this will be helpful to you.   Alter table: add, modify, and

Today, I am going to give you a brief introduction to the restoration and deletion of data instances by bbed in oracle. I hope this tutorial will be helpful to you. Restore Deleted Data 1. Create a simulated environment The Code is as

This article will introduce the methods for stopping and starting the services of the Oralce database, including some methods in windows and linux systems. I hope this method will be helpful to you. Log On As A database user first Stop Database

This article will introduce you to hadoop installation and configuration. If you contact hadoop installation and configuration for the first time, please refer to it. It is absolutely useful to you. Each component of hadoop in the hadoop

42. You plan to use SQL Performance Analyzer to analyze the SQL workload. You created a SQL Tuning Set as a part of the workload capturing. What information is captured as part of this process? (Choose all that apply .) A. the SQL text B. the