postgresql database encryption

I have to say that at this point, PostgreSQL is very powerful and no less powerful than any large commercial database. It is not that complicated to add custom functions. The following example adds the following functions: Test (), concat_text (string, string). If this is not an example, you can try it by yourself.1. The Code is as follows: /* $PostgreSQL: pgsql

PostgreSQL is not very familiar with it. I don't know if there is any good way to retrieve the number of records in all tables and tables in the data. Please tell us if you have any good methods. Thank you !! There was a database with more than 200 tables in it, and a simple PHP program implementation was written in a stupid way. Retrieve all tables PostgreSQL

/* In the process of writing the Greenplum function, the following two functions are found, based on the affinity of Greenplum and PostgreSQL, when determining whether a string is a numeric or date format. */--1. Determine if a string is a digital CREATE or REPLACE FUNCTION isnumeric (txtstr VARCHAR) RETURNS BOOLEAN as $$ BEGIN RETURN txtstr ~ ' ^ ([0-9]+[.]? [0-9]*| [.] [0-9]+) $ '; END; $$ LANGUAGE ' plpgsql '; --2. Determine if the pa

I use the Postgres version of the source code for postgresql-9.3.5.The system is CentOS6.5, which is 64 bits.Read the README directly after downloadingThen read the install and follow the steps to do it.I was compiling, because there are two libraries can not find, my system is not, so my configure parameters are as follows:./configure--without-readline--without-zlibThen the next step and the steps in the INSTALL are completely unknown and successful.

Label:First, install the associated dependent libraries:1) GNU makeGNU make is required and the version is greater than or equal to 3.76.1, check the Gmake method:Gmake--versioninstallation command:Yum-y Install make2) zlibPostgreSQL uses zlib compression library by defaultinstallation command:Yum-y Install Zlib-devel3) GCCBecause the compiler requires a compiler that is compatible with Iso/ansi C, comply with the C89 standard.installation command:Yum-y Install GCC4) GNU ReadlinePostgreSQL defau

KaLi Connecting the PostgreSQL databaseTo see if PostgreSQL is up and not started, start with the service PostgreSQL Start command. After starting to see if the boot was successful, the port is 5432:650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/4C/7F/wKioL1Q-kgaSWeZXAAC1T1E06QE255.jpg "title=" 34.png "alt=" Wkiol1q-kgaswezxaac1t1e06qe255.jpg "/>After

Preface In fact, in Python can be used to connect the module of PostgreSQL many, here is recommended psycopg2. PSYCOPG2 is very simple to install ( pip install psycopg2 ), here are the main highlights of how to use. To connect to a database: Import Psycopg2conn = Psycopg2.connect (host= "10.100.157.168", user= "Postgres", password= "Postgres", database= "TestDB

Listen_addresses: #指定数据库用来监听客户端连接的TCP/IP address, the default is the value is *, indicating that the database will be on the computer running the data on all IP addresses on the machine to listen to user requests, can be written as the name of the machine, can also be written as an IP address, Different values are separated by commas and, if set to localhost, indicate that the database can only accept local

I. Disk Space Restoration: In PostgreSQL, the data rows deleted or updated using the delete and update statements are not actually deleted, the physical address of the old data row sets the row status to deleted or expired. Therefore, when data in a data table changes frequently, the space occupied by the table will become large after a period of time, but the data volume may not change much. To solve this problem, you need to regularly perform VACUUM

MySQL cannot support the data version from the most basic data engine to the process structure. Causes its function to block "concurrency", does not support the most basic transaction, InnoDB does not reach the basic transaction requirements, any write data, causes the entire table to lock. At best, a toy, or a key->value data store, is no different than a database (RDBMS) MySQL cannot support any OLTP or OLAP. Can only be used as the basic data store

Welcome to the Oracle community forum and interact with 2 million technical staff. One of the main features of PostgreSQL is to create custom "views". These views are only pre-defined SQL queries, they are stored in the database and can be reused as needed. Therefore, it is more effective to store frequently-used SQL queries in this way than to input them manually each time. Welcome to the Oracle community

Tags: thread record lazy entity postgres name update mes inf Abp.nhibernate Dynamic Library connection to PostgreSQL database The initial contact with the ABP framework, the framework of the operation of various types of data in the method is still very useful, I am still in the further study, and will use ABP. NHibernate Class Library operation