Database Administrator

This article describes the comparison between SQL Server and stored procedures from multiple perspectives. ① Why should stored procedures be used? Because it is faster than SQL statement execution. ② What is a stored procedure? Combine a bunch of

This article introduces the storage mechanism and access method of image data by mis SQL Server. For VB development tools, this paper introduces a method to access image data in mis SQL Server through the GetChunk method and AppendChunk method of

You need to know how to use some SQL clauses and operators to arrange SQL data for efficient analysis. The following suggestions show you how to create a statement to obtain the expected results. Arranging data in a meaningful way may be a challenge.

1. First download the driver:(Cx_Oracle), pay attention to the version and select it based on your situation.2. installation:Run the exe installation program. It will copy a cx_Oracle.pyd to the {PYTHON_HOME} \ Lib \ site-packages directory.3.

MYSQL is often garbled. Many of my friends may not be able to solve this problem. I will write it out and share it with you,In this example, the encoding is GB2312. If you are using another encoding, modify GB2312 for your own, such as UTF8.Add the

Install Oracle9.2.04 in Linux AS3.0 1. Download Sun's Java Development Kit (JDK 1.4.2 ).J2sdk-1_3_1_09-linux-i586.rpm.binDownload the Oracle Installation Software otn.oracle.com.Lnx_920_disk1.cpio.gzLnx_920_disk1.cpio.gzLnx_920_disk1.cpio.gzDownload

When you connect to the MySQL server, you should use a password. The password is not transmitted in plain text. The password processing in the Client Connection sequence has been upgraded in MySQL 4.1.1, which is safe. If you are still using a pre-4.

Install# Groupadd mysql# Useradd-g mysqlDecompress and compile# Tar-zxvf mysql-5.0.22.tar.gz# Cd mysql-5.0.22#./Configure -- prefix =/usr/local/mysql -- with-charset = gbk# Make# Make install# Cp support-files/my-medium.cnf/etc/my. cnfSet auto-start#

Suppose MYSQL has a database, and it has a table pet.+ --------- + ------------- + ------ + ----- + --------- + ------- +| Field | Type | Null | Key | Default | Extra |+ --------- + ------------- + ------ + ----- + --------- + ------- +| Name |

How to modify the prompt in Oracle When sqlplus is started, it reads the glogin. SQL script and writes it in the $ Oracle_HOME/sqlplus/admin directory. Here is an example. [Php] -- -- Copyright (c) Oracle Corporation 1988,200 0. All Rights Reserved.

The DBMS_RANDOM package provides users with random numbers. When DBMS_RANDOM is used, the RANDOM number seed is provided. The so-called RANDOM number seed is the value used in the RANDOM algorithm. In many programming languages, the seeds of two

Oracle uses triggers and sequence to achieve auto-Growth of primary keys Create a table -- Create tableCreate table GEO_BOOKMARK(F_ID NUMBER not null,F_NAME VARCHAR2 (100) not null,F_REMARK VARCHAR2 (200 ),F_XMIN NUMBER not null,F_YMIN NUMBER not

The following script can be executed at every day through a scheduled task, so that warning logs are automatically saved to the corresponding directory by time classification. It is convenient to view the Alert logs generated by Oracle every

I. Permission classification: System permission: The system specifies the user's permission to use the database. (System permissions are for users ). Object permission: A permission that allows you to access tables or views of other users. (For

[Oracle @ www.bkjia.com ~] $ Expdp admin/admin tables = studentinfo, teacherinfo DIRECTORY = dpump_dir3 dumpfile = info. dmp content = all Export: Release 10.2.0.1.0-Production on Tuesday, 25 May, 2010 18:23:02 Copyright (c) 2003,200 5, Oracle. All

I. Bidirectional replication Node 2 Configuration:1) add additional redolog InformationDblogin userid ogg, PASSWORD ogg Add trandata scott .* 2) Configure extractGGSCI (cuug97) 11> edit params EORA_1 EXTRACT EORA_1SETENV (NLS_LANG = AMERICAN_AMERICA.

Redo Log Buffer is located in sga_max_size, which stores information about database changes. This information is stored in the form of Redo Entries (Redo Entries, also known as Redo Records ). Redo Entries contains important information for

For more information about how to use the Export and Import functions of HBase to complete backup, see my previous HBase Incremental backup. Reprint the Python code that regularly backs up data using Export and Import. Complete backup is performed

Reasonable creation of strategic indexes for database tables can greatly improve query performance. But in fact, the index we create in daily life is not a strategic index. It is precisely because a large number of redundant or useless indexes

The cascade operation of Oracle is to process the data in the primary table. There are three situations: 1. set null: This keyword is used to set the value of the referenced column in The subtable to NULL when the data in the referenced column in