Database Administrator

In Oracle, how does one set access to multiple SQL Server databases? Suppose we want to access the default pubs and Northwind databases in SQL Server at the same time in Oracle. 1. on a windows machine with Oracle9i Standard Edition or Oracle9i

Database management systems such as SQL Server rely on timely file input/output operations. Failure or misconfiguration of hardware, firmware settings, filter drivers, compression, program errors, and other conditions in the I/O path may cause

Oracle has set up a dedicated apt source server for Ubuntu users. You only need to add a line in/etc/apt/source. list: Deb http://oss.oracle.com/debian unstable main non-free You can. Before running the apt-get update command, you must add the

You can take the following steps:Query the latest service packageMake sure that you always have the latest service package. For SQL Server2000, this is SQL/downloads/2000/SP3.asp "> SP3a. Remember that there are multiple service packages. If you use

The installation of MySQL5 In the Solaris operating system is based on the official MySQL5.1 Reference Manual section 2.7 "Install MySQL in other Unix-like systems" steps, and the official information is reliable, sort it out for easy

MySQL is installed in two parts: client and server. After the MySQL server and client are installed, the database tables and the table structures in the database are imported and exported, some SQL commands used now: > MySQL-u busiusr-p enters the

Question 1: The MySQL disk is full. Question 2: mysql repair multiple tables Repair table: perform the following steps by week: 1: lock table EE write; 2: flush table EE; 3: repair table EE; 4: flush table EE; 5: unlock table EE; // A

Oracle announced the donation of data integrity code to Linux kernel. The Code was developed by Oracle and Emulex in cooperation and has been accepted by 2.6.27 kernel. The Code adds metadata to the static and transmitted data to monitor whether the

NAME TYPE VALUE--------------------------------------------------------------------------Audit_trail string DB Hello everyone! Recently, the company's server system tablespace is getting bigger and bigger, and segments logical reads and segments

Full (outer) join is the syntax used to fully connect two tables. That is to say, if you want to associate Table A with table B, you can obtain records that exist in Table A but not in Table B, or that exist in Table B but not in table. The on

In Ubuntu 12.04, you can use the apt-get method to install MySQL. It is too troublesome to install and change the configurations by yourself, the following two articles are worth your reference: I just want to save time. In fact, it is best to

Summary of 10 GB flash back in Oracle 1. flashback query (undo)Select current_scn from v $ database;Select * from t as of scn;Time and scn conversion functions:Scn_to_timestamp ()To_timestamp ()Timestamp_to_scn () 2. flashback table (undo)Select row_

GUID (Global unique identifier) is a globally unique identifier, which consists of the ID numbers on the NIC (each Nic has a unique ID number) and a 16-byte binary value generated by the unique number of the CPU clock. The GUID format is

MySQL does not allow the select from statement to point to the table used for UPDATE. Of course, there is a better way than creating an endless temporary table. This article explains how to UPDATE a table and use SELECT in the query clause. Problem

APIS involved in this article: Hadoop/HDFS: http://hadoop.apache.org/common/docs/current/api/ HBase: http://hbase.apache.org/apidocs/index.html? Overview-summary.html Begin! HBase queries are implemented in either of the following ways: 1. Obtain a

Recently, I was engaged in the secondary development of sqlite3. When I saw the transaction in the API, I came up with the idea of testing whether the transaction was enabled or not to affect the time required for data insertion. According to the

I. Basic Theoretical knowledge of rman backup Rman (recovery manager) is used to manage backup, dumping, and recovery operations. When the rman command is executed, Oracle parses these commands into PL/SQL blocks, the server processes execute these

Generally, as a non-DBA, we only focus on some SQL indicators. For the main indicators, see, For more information, see the description below. SQL ordered byElapsed Time Top SQL statements that record the total execution Time (note that the total

Create a Mongodb Database Because Mongodb is not a relational database file, it does not actually have the so-called "Database" concept in traditional relational databases, but don't worry. When you add data for the first time, mongodb will be saved

In SQL * Plus, you can perform simple read/write access to text files in the operating system.For example, store the SQL statement or PL/SQL block code in a text file, and then transfer the text file to the buffer for execution.You can also save the