Database Administrator

String SQL = "insert into tablename (a, B, c) values (?,?,?) "; PreparedStatement pstmt = conn. prepareStatement (SQL); // execute the query pstmt.exe cuteQuery (SQL); // execute the update pstmt.exe cuteUpdate (SQL ); Cause: the PreparedStatement

4. Use Alibaba sec for permission Control GoldenGate can restrict the use of commands by some users. For example, some monitoring users can only use the INFO and STAT commands, rather than the start and stop commands. This is the purpose of limiting

First Installation Mysql Mysql1: Use Default Configuration Root @ localhost usr] # groupadd mysql [Root @ localhost usr] # useradd-g mysql [Root @ localhost usr] # cd/usr/local [Root @ localhost local] # tar-zxvf mysql-5.5.9.tar.gz [Root @

I. Introduction to tempdb 1. Concept Tempdb is a system database that can be used by all users connected to the SQL Server instance. Every time SQL Server is started, tempdb is re-created to maintain a clean copy of the database at system startup.

Import and Export Oracle Data imp/expFunction: Oracle Data Import/Export imp/exp is equivalent to oracle data restoration and backup.In most cases, you can use Oracle data import and export to complete data backup and restoration without causing

OLTP performance adjustment and optimization-conclusion According to the waterfall model of the software life cycle, the performance of an application has been qualitative in its design stage. If you think of optimization only after the application

-- ====================================== -- Oracle instance recovery -- ====================================== I. Oracle instance failure Oracle instance failures are mostly caused by instance non-consistent shutdown, which is usually called a

Lab environment: AIX: OS Version: AIX 5L for POWER V5.1 IP address: 192.168.0.5 Assume Domain Name: king.com Host Name: pp.king.com As a Domain Name Server, a complete server is required to have the positive and reverse functions. Currently, many

My favorite question during Interview for people to work as MySQL DBAs or be involved with MySQL Performance in some way is to ask them what shoshould be tuned in MySQL Server straight after installation, assuming it was installed with default

1. TOM's table information viewing process and authorization Create or replace procedure SHOW_SPACE (P_SEGNAME IN VARCHAR2, P_OWNER IN VARCHAR2 default user, P_TYPE IN VARCHAR2 DEFAULT 'table', P_PARTITION IN VARCHAR2 default null) -- this procedure

I use Java to connect to the MySQL database and write data through JDBC. The Chinese character string directly generated in Java is written into the database and becomes the question mark "?". Below are my records for solving this problem.First, I

Fault symptom:ERROR: 12-09-20 16:15:03 get the maximum size ERROR: CallableStatementCallback; uncategorized SQLException for SQL [{call USP_SYS_CMSCODE (?, ?, ?, ?)}]; SQL state [72000]; error code [1552]; ORA-01552: non-system tablespace 'users'

In MySQL5.5 or an older version of MySQL5.1), only one column of fields in the timestamp type can have the automatic insertion time and update time, or only one column of fields can have the automatic insertion time, the field in the other column

I just got back from Shandong and had a bunch of troubles. No, it's about to get off work. The customer says oracle rac is down.   650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131229/19233051N-0.jpg "border =" 0 "alt ="

During SQL server startup, the startup information will be read from the Registry first. Sometimes, when SQL Server cannot be started, we need to modify the registry. But where is the SQL server information stored in the registry? I have been

In general, we understand that after the logbackup chain is broken, a complete backup is required before a new log backup starts. In fact, it is not necessarily necessary to complete the backup, and differential backup is also possible.     First,

The user cannot log on to the database because the syslogins table in the master database is deleted by mistake. However, if there is a backup of the master database, try to restore it. The following are the summary steps. 1. Back up the master

I. Basic Information Environment: aix + ha + sybase mutual backup Cause: the same lv_tempdb name is created on the two aix servers due to the extended tempdb space. The service is switched to the same server, so that the volume group cannot be

MASICONG @ orcl> select sid from v $ mystat where rownum = 1; SID ---------- 35 MASICONG @ orcl> select sid from v $ mystat where rownum = 1; SID ---------- 1 1. Simulate the blocking example caused by insert, update, and delete, describe the

Under the CBO (cost-based optimizer mode) condition, the execution plan of SQL statements is determined by the statistical information. If no statistical information is available, the execution plan is determined by dynamic sampling! It can be said