MySQL collects logs of the previous day. logs of this week are collected on a specific day.

In the mysql database, count the logs of the current day: For example, the Date Field of the bean database is usedate. Calculate the log SQL statement for the current day: select * from bean where date(usedate) = curdate(); Curdate () indicates the

RedHat AS4 UP7 (64-bit) Installation of Oracle 10 Gb Single Instance

1. Oracle Installation RequirementsDatabase Installation Requirements:Database Installation requirements are as follows: 1. Currently, it is installed on a file system.2. Install oracle. The default user password is oracle.3. Database sid: taac4.

Restrictions on Oracle profile user resources

I. Description Oracle recommends that you use the Database Resource Manager rather than this SQL statement to establish resource limits. the Database Resource Manager offers a more flexible means of management and tracking resource use. for more

ORA-09817: Write to audit file failed solution

Connect to ORacleError:ORA-09817: Write to audit file failed.   [Oracle @ qs-dmm-rh1 dave] $ sqlplus sys/oracle as sysdba; SQL * Plus: Release 10.2.0.4.0-Production on Thu Mar 17 16:35:02 2011 Copyright (c) 1982,200 7, Oracle.All Rights

Create a date master table in the Oracle database

The date functions provided by Oracle can meet all the daily operations on the date. Generally, we often encounter date fields when designing table structures. If the business needs to summarize the data of the week where the given date is located,

Solution to inconsistency between Oracle dbtimezone and OS Time Zone

Connected to Oracle Database 10g Enterprise Edition Release 10.1.0.2.0Connected as sys// View the database Time ZoneSQL> select dbtimezone from dual;DBTIMEZONE----------+ 00: 00// View the current time and time zoneSQL> select distinct imestamp from

Oracle PL/SQL programming stored procedures and functions

The main content of this article is as follows: 6.1 Introduction 6.2 create a function 6.3 stored procedures 6.3.1 creation process 6.3.2 call a stored procedure 6.3.3 AUTHID 6.3.4 PRAGMA AUTONOMOUS_TRANSACTION 6.3.5 procedure 6.3.6 deletion process

Modify the default MySQL root management password in Linux

Important directories of Linux MySQL 1. Database directory/Var/lib/mysql/2. Configuration File/Usr/share/mysql (mysql. server command and configuration file)3. Related commands/Usr/bin (commands such as mysqladmin mysqldump)4. Start the

MongoDB-level data Insert, Query, and Delete performance tests

MongoDB-level data Insert, Query, and Delete performance tests (without or without indexing) Let's take a look at the testing machine performance (64bit ): Performance_^ [root @: ~] # Grep"Model name"/Proc/cpuinfo | cut-f2-d: Intel (R) Xeon (R)

Configure tnsnames. ora in the local Naming Service of Oracle

Sqlplus local connection is not a server The error is as follows: SQL> conn hailiang/hailiang @ DBNetSpiderERROR:ORA-12154: TNS: cocould not resolve the connect identifier specified Solution: I forgot to configure the tnsnames. ora file

Use Tomcat + Java JDBC to connect to an Oracle database

First, put the classes12.jar/ojdbc14.jar driver package in the Oracle Installation Directory (D: \ oracle \ product \ 10.2.0 \ db_1 \ jdbc \ lib \) to the tomcat lib directory. "Java" Import="Java. SQL .*"PageEncoding ="GBK"%> "Oracle. jdbc.

How to change the schema or user name in Oracle

Developers have a requirement to move all objects in a schema to another shema. After thinking about it, simply change the schema name? In this way, you do not need to move the data. You are prepared to directly change the data using DDL statements:

Processing of date fields in Oracle

(1) In the English version of Oracle, the default date format is 'dd-MON-YY ', for example, '01-JAN-98' In the Chinese version of the Chinese version, the default ORACLE date format is 'day-month-Year', for example, '21-January-2003-'or '21-January-0

MySQL cluster mysql-cluster Installation

Hostname IP address application serviceDB1 www.bkjia.com MGMDB2 192.168.6.160 NDBD, MYSQLDDB3 192.168.6.188 NDBD2, MYSQLDDB4 192.168.6.191 MYSQLD 1. DB1 management node MGM . /Configure -- prefix =/usr/local/mysql/-- with-charset = utf8 --

Oracle determines whether it is a numeric or numeric string (sqlserver isnumeric)

Requirements: If the field value is not a numeric or numeric string, update the field value'' 1. Function Method (batch release is not allowed ):[SQL] CreateOrReplaceFunctionIsNumber (p_in varchar2)ReturnBooleanAs I number; Begin I: = to_number

Comment on the MySQL my. cnf configuration file

The following is a description of parameters in the my. cnf configuration file: [Client] Port = 3309Socket =/home/mysql/tmp/mysql. sock [Mysqld] ! Include/home/mysql/etc/mysqld. cnf # contains the configuration file and stores the user name and

New Features of Oracle 10 GB-cross-platform tablespace Transfer

1. preparations:Query source database platform information SQL> col platform_name for a40SQL> SELECT d. PLATFORM_NAME, ENDIAN_FORMAT2 from v $ TRANSPORTABLE_PLATFORM tp, V $ DATABASE d3 WHERE tp. PLATFORM_NAME = d. PLATFORM_NAME; PLATFORM_NAME

DB2 log (1) Basic knowledge

In the database, the importance of logs is very large, so logs must be understood first. Log Type:Primary log (Primary logs)Pre-allocated. The available quantity is specified by the LOGPRIMARY parameter of db cfg.Secondary log (Secondary

Patch 7272646 for Oracle patching Process

Install Oracle 11.1.0.6.0 in RedHat enterprise linux 6.1 Error prompted: OUI-18001: the operating system 'linux Version redhat-6.1 'is not support You need to change the change method. edit the file/etc/redhat-release and change Red Hat Enterprise

ERROR 1146 (42S02): Table 'mysql. slow_log 'doesn' t exist

Check the latest slow log and check whether slow log is enabled.   Mysql> show variables like '% slow % ';+ --------------------- + ------------------------------------------ + | Variable_name | Value | + --------------------- + ---------------------

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