teradata database architecture

After work, have been busy with the front-end development; Basically forget, all of Oracle's things; think back to the original "DBA" dream; Consider the present situation, long story, filled with emotion; In order to pick up the knowledge of the database, have been looking at the blog of Daniel; In order to deepen the memory, it and review , the following will continue to extract Daniel's blog content; merely;Here is an Oracle

The goal is to conceive an abstract, conceptual, universal, usable in most Web database commercial systems, while the specific schemas are designed on this architecture,Not familiar with the UML, so use WPS painting, put up the diagram, interested in the ape friends, if you can read, please give some pointers, thank you, there are good suggestions, I will revise and put up again.--------------------picture

located and execute the Python ez_setup.py on the command line The scripts directory will be generated in the Python installation directory, with Easy_install.exe Add the script directory to the environment variable path. 2. Installing the SQLAlchemy module CMD command line, Run command: Easy_install sqlalchemy Specific code shows: For more tutorials, you are welcome to focus on today's headlines-making full-stack siege lions. Talk about learning together.

Label:There are 4 main architectures for Oracle databases: Physical storage structure Logical storage structure Memory structure Process structure I. Physical storage structureThe Oracle database is physically composed of system files stored on disk, which is the physical storage structure of Oracle.1.1 Data filesA data file is a file that is stored in the data in the database, usually in t

several methods of DAO accessing database in Spring+hibernate architectureIn the spring+hibernate architecture, there are several ways to access a database, by spring Dependency injection to differentiate between 3 kinds, before this to understand spring's dependency injection, the two main core of spring is the IOC (control reversal) and AOP (aspect-oriented pro

= ' NETSTAT-TLNP | grep "3306" |awk-f[: ""]+ ' {print $4} ' function Checkmysqlstatus () {/usr/bin/mysql-uroot-plizhenghua--connect_ Timeout=5-e "show databases;" >/dev/null 2>1 if [$?-ne 0] then Restartmysqlservice If ["$MYSQLPORT" = = "3306"];then echo "MySQL restart successful ..." Else echo "MySQL restart failure ..." echo "Server: $MYSQLIP MySQL is off, please try the restart MySQL by Manu al! ">/var/log/mysqlerr #mail-S" warn! Server: $MYSQLIP MySQL is down "[emailpro

Tags: ble learning entry Good type programming AMP data arc --20170322 --1.0 --Update the statistics of the tableBeginDbms_stats.set_table_stats (user, ' EMP ', numrows = 10000);EndBeginDbms_stats.set_table_stats (user, ' DEPT ', numrows = 10000);End--Re-view the statistics of the tableSelect T.table_name,t.num_rows,t.blocks from User_tables t where T.table_name in (' EMP ', ' DEPT ');/*DEPT 10000 100EMP 10000 100*/ --2.0 --View the number of blocks of data occupied by the index, cluster factor