Database Administrator

1. Oracle CREATE OR REPLACE FUNCTIONSETSTATE (OLDVALUE VARCHAR2, pos number, SVALUE VARCHAR2) RETURNVARCHAR2 IS RETURN_VALUE VARCHAR2 (20 ); Len number (8 ); I NUMBER (8 ); TEMP_VALUE VARCHAR2 (1 ); BEGIN LEN: = LENGTH (OLDVALUE ); If pos>

To use Linux and MySQL, you must be familiar with Common commands. The following are some common commands collected: 1. commands for starting mysql in linux:Mysqladmin start/Ect/init. d/mysql start (the installation path of mysql is earlier)2.

Oracle10g Profile FAILED_LOGIN_ATTEMPTSOracle Database 10 Gb has a small improvement in the default user management, that is, the failure attempts to FAILED_LOGIN_ATTEMPTS passwords have become 10 times. This setting is indeed a bit problematic. If

Oracle dynamic SQL DBMS_ SQL built-in package Native Dynamic SQL Three common functions of Native Dynamic SQL Execute dynamic DDL or DML statements that do not contain Bound variables. Execute dynamic DDL or DML containing Bound variables

LIKE fuzzy query The wildcard characters "%" and "_" can be used for character matching: %: Represents any character, including zero; _: Represents any character; ConnectedToOracleDatabase11g Enterprise Edition Release 11.2.0.1.0

Problem:ORA-00257ORA-16014 log 1 sequence #1085 not archived, no available destinationsORA-00312 online log 1 thread 1 'usrapporacleoradatawanyanredo01. Log'Cause:2 GB of the flash recovery area of the archived logs is full. Check Procedure: SQL>

When the MySQL database is started, the following error occurs:120419 19:10:32 [ERROR]/usr/local/mysql/libexec/mysqld: Can't find file: './mysql/host. frm' (errno: 13)120419 19:10:32 [ERROR] Fatal error: Can't open and lock privilege tables: Can't

The partition table function of MySQL is only supported since 5.1. If MySQL of CentOS is 5.0, You Need To uninstall MySQL and install MySQL 5.1. The following are records of operations, errors, and solutions: 1. Disable the current mysql

When I tried to perform an exp test in my notebook today, I suddenly reported an error: ORA-03505:TNS:The specified connection identifier cannot be resolved. Use tnspingBelow:C: \> tnsping wwl;   TNS Ping Utilityfor 64-bit Windows: Version 10.2.0.4.0

Create TableTablea (idInt, IpVarchar(15), appsVarchar(10 )) Insert IntoTableaSelect23,'2017. 0.0.1','Aaa' Go Declare@ Variable1Varchar(15), @ Variable2Varchar(10) Select@ Variable1 = ip, @ Variable2 = appsFromTableaWhereId = 23 Select@

Windows Platform Steps required to thoroughly remove DB2 from Windows. This task should be executed only when you no longer need an existing DB2 instance or database. If you are detaching the default copy of DB2 and you have other copies of DB2 on

Many databases are supported in php, but when combined with the best database mysql, IT and linux, apache, and php constitute a LAMP system. Php performs the following operations on mysql: connect to mysql database --> select database --> Execute

In the master-slave replication of MySQL, the transmission process is plain text transmission, which does not guarantee data security. When compiling and installing Mysql, an option such as -- with-openssl is basically added, that is, it supports

12.1.1DEMO:Patch 6678700 For ESA Language Failed For R12.1 Vision [ID 843376.1]FADTXD. xlfStart uploading...[060909_075004671] [] [EXCEPTION] java. io. UTFDataFormatException: Invalid UTF8 encoding.At Oracle. xml. parser. v2.XMLUTF8Reader.

Source database:Computer Name: bkjiaDatabase Name: orcl Target database:Computer Name: suzhouDatabase Name: ocp 0. Create a test table for the target databaseSQL> conn scott/passwordConnected.SQL> show user;The USER is SCOTT"SQL> create table t12 (3

1Environment Introduction: This is a test library. After deleting all the parameter files, control files, and data files, we can restore the data. I restored both the control file and parameter file, but the database could not be opened.ORA-01103:

I. pg_class: The system table records metadata of data tables, indexes (still need to see pg_index), sequences, views, composite types, and some special link types. Note: not all fields make sense for all object types. Name Type

At present, all major portal websites tend to use MySQL to a certain extent. In addition to the I/O/E campaign advocated by the Alibaba system, we must correct the earlier view that we have always despised MySQL, as a database practitioner, we must

MySQL provides the master-slave replication function, which is similar to Oracle's slave uard. However, configuration and management are far simpler than slave uard, and there is no so-called physical slave database or logical slave database, there

The same Oracle dll script: DeclareCInt;Begin Select Count(*)IntoCFromUser_tablesWhereTable_name =Upper('Activestarttimes'); If c = 1Then ExecuteImmediate'Drop table "ACTIVESTARTTIMES" cascade constraints'; C: = 0;EndIf;