Database Administrator

Redis data persistence In general, there are two persistence solutions: RDB and AOF.The RDB method creates a time point-based snapshot for the dataset at a certain interval.The AOF method records the write operations received by the Server to log

SQL Server extracts data at intervals for Data Sampling. SQL Server Select Ana1, RdDate, RdTime, cast (convert (varchar, RdDate, 112) + ''+ convert (varchar, RdTime, 108) as datetime) as time, t. interval FROM (SELECT Ana1, RdDate, RdTime, datediff

Monitor the running status of database things and database things Select dbt. DATABASE_ID, DB_NAME (DBT. DATABASE_ID) 'database name', DBT. TRANSACTION_ID,. NAME,. TRANSACTION_BEGIN_TIME, case. TRANSACTION_TYPE WHEN 1 then' read/write TRANSACTION

Database integrity and constraints, database integrity constraints Reprint please indicate from Zhu jiayuan http://blog.csdn.net/zhgl7688 Database integrity and constraints 1. Data Integrity: three types of constraints are commonly used to ensure

IIS installation and configuration, IIS installation Configuration This tutorial applies to win7 Systems 1. Install IIS (1) If the IIS server is not installed in the operating system, open the control panel and click Start Program and function

Install and configure MySQL in centOS6.5, centos6.5mysql Install and configure MySQL in centOS6.5 1. SSH Secure Shell Client First, install the SSH Secure Shell Client, a tool for connecting to a remote Linux system, or an SSH Client for

Install MySQL Enterprise Monitor and mysqlenterprise MySQL Enterprise Monitor is an Enterprise-level monitoring designed specifically for MySQL databases. It can be well integrated with various MySQL features, including: mySQL's key performance

What is ETL? SDE: Source Dependent Extract SDE mappings -- extracts the data from the transactional Source System and loads into the data warehouse staging tables. SDE mappings are designed with respect to the source's unique data model. SDE _ *

Redis Research (8)-Ordered Set Type 1, redis research set type I. Introduction Sorted set Associates each element in the set with a score. Therefore, you can obtain the first N elements with the highest or lowest scores, and obtain the elements in

10. mysql Import and Export Database, mysql Import and ExportImport and Export mysql database commands in linux1. Use the mysqldump command to export the database (Note: If this command is not available, run this command in the mysql installation

Create an oracle database, user, tablespace, role permission setting script, and oracle Database/* Divided into four steps *//* Step 2: create a temporary tablespace */Create temporary tablespace contract_tempTempfile 'd: \ oradata \

Common Oracle functions-character and mathematical functions, oracle mathematical functions Various functions are often used in the development and use of oracle. This chapter summarizes simple strings and mathematical functions, which will be

PL/SQL Developer customizes the case-sensitivity conversion icon to the toolbar. pldeveloper For case-insensitive conversion shortcuts, see http://blog.csdn.net/itmyhome1990/article/details/41363633 You can add the case-insensitive conversion icon

Rollup and cube, oralcerollup of Oralce advanced SQLIn oracle SQL query, oracle provides some advanced functions to simplify SQL query statements and improve query performance. The following describes the usage and difference of rollup and cube.1.

Oracle lock 1: DML lock, oracle lock 1dmlDML lock, also known as data lock, is used to ensure data integrity when multiple users operate on data. DML lock prevents conflicting DML and DDL operations at the same time. DML Locks include Row Locks (TX)

Left join, join, right join difference, leftjoinLeft join returns records that include all records in the left table and join fields in the right table.Right join returns records that include all records in the right table and the joined fields in

Master-slave synchronization for Redis and master-slave for redis Synchronization Why does Redis implement master-slave synchronization? Master-slave synchronization has the following benefits: Partial re-synchronization Redis introduced

Silent oracle database installation on OEL7.0, oel7.0oracle Silent oracle database installation on OEL7.0Silent Installation is rarely used, and basically does not require Silent Installation. Xmanager is used to redirect graphics even for

MySQL (9) -- string function (2), mysql string(8) Delete the TRIM (s1 FROM s) function of the specified string) TRIM (s1 FROM s2) deletes all substrings s1 at both ends of string s. S1 is an optional direction. If no direction is specified, spaces

Oracle arithmetic operations, oracle Arithmetic In Oracle's default installation, a SCOTT user has been created. The default password is tiger, which has four tables:Employee table (EMP), department table (DEPT), salary Registration Form and bonus