Postgres can be used to export data from the Pg_dump database. [1] Export only the database structure of all objects C:\>pg_dump-f dddddd.sql-i-c-e utf8-n public-s-u portal-h localhost-w Portal -I is for a compatible database version -C includes statements to create a database -e Setting the encoding of the exported data -N is the name of the scheme -U is the user name -H is the name of the database server -W is a strong Password Validation -s o
Links are an introduction to common GUI tools.
Https://wiki.postgresql.org/wiki/Community_Guide_to_PostgreSQL_GUI_Tools#phpPgAdmin
In addition to Pgadmin, depending on the customer's personalized requirements, some customers may need * to Web interface, browser-based postgres management tools
Depending on the content of the link, keyword Search web, the following tools to support the browser management Postgres
Tags: select Name records width INF from HTTP POST VATThe first step is to download the Postres driver on the Internet, after installation,: https://www.devart.com/odbc/postgresql/download.htmlSecond step to create an ODBC data sourceClick "Start-" control Panel-"Management tools-" data source (ODBC)-"User dsn-" Add "Write VBA code after the installation is configured.private Sub CommandButton1_Click () Dim CNN as New ADODB. Connection Dim rs as New ADODB. Recordset Dim dataBase As String Dim us
Tags: Data Manager man OWIN EPS 3.1 lib Apt-get codeSteps that worked for me Ubuntu 8.04.2 on to removepostgres 8.3
List all Postgres Related packages dpkg-l | grep postgresii PostgreSQL 8.3.17-0ubuntu0.8.04.1 Object-relati Onal SQL Database (latest VERSIII postgresql-8.3 8.3.9-0ubuntu8.04 Object-relationa L SQL Database, version 8.3ii postgresql-client 8.3.9-0ubuntu8.04 front-end programs F or PostgreSQL (latest Veii postgresql-client-8.3 8.3.
Transferred from: http://blog.csdn.net/yufenghyc/article/details/45869509--1 Examplepostgres=# Select 1/4;? column?----------0(1 row)In PG If you want to do division and want to keep decimals, the method above does not work, because the "/" Operation results are rounded, and the fractional part is truncated.--2 Type Conversionspostgres=# Select round (1:: Numeric/4:: Numeric,2);Round-------0.25(1 row)Note: After the type conversion, you can retain the fractional part.--3 can also be converted by
selectextract (ISOYEAR fromfromdate_) asyear_,--the year in which the week was made extract (WEEKFROM fromdate_) asweek_,--the year in which the week was made To_char (fromDate _, ' YYYYMMDD ') asfromdate_,--Week start date to_char (todate_, ' YYYYMMDD ') as End date of todate_--week from (select (date (curDate) -7*weeks_) asfromDate_, (date (curdate) -7*weeks_+6) as toDate_from (selectgenerate_series (1,100) weeks_, -- interval weeks (sequence, here take 100 weeks) cast (Date_trunc (' Week ',
That blue students:http://blog.163.com/li_hx/ Have the ideal pig:Http://my.oschina.net/quanzl Tangcheng (OSDBA): http://blog.osdba.net/ Sun Peng:http://blog.sciencenet.cn/home.php?mod=spaceuid=419883 Big belly Bear:http://www.cnblogs.com/daduxiong/category/257029.html Stephen_liu:http://www.cnblogs.com/stephen-liu74/archive/2012/06/08/2315679.html Note: Ranked in no particular order, after finding the right blog to add. --5 Video Tutorial PostgreSQL video Tutorial (with):http://www.tudou.com/ho
1 ImportPSYCOPG22 ImportPsycopg2.extras3 4conn = Psycopg2.connect (Database=self.dbname, User=self.username, Password=self.password, Host=self.host, port=self.port)5cursor = Self.conn.cursor (cursor_factory=psycopg2.extras.DictCursor)6sql =""7 cursor.execute (SQL)8rows =Self.cursor.fetchall ()9 #The elements in the rows at this point are the structure of the rowdict type,Ten forRowinchrows: One Printrow['a column name'] AccessReference: Http://yuanjun.me/postgresql/pythoncao-zuo-postgresql#
Pear::D B is the choice of a ADODB database, in addition to the Postgres, this article describes how to use DB to join the database with an example
Installing pear is not covered in this article. In pear, the class that joins the database has the following:
1 "MDB";
2 "MDB2: Because MDB2 's author has been looking forward to PDO into release status, so far MDB2 has been beta version;"
3 "PDO: Connection speed should be the fastest, is a C module, but
Every movie needs a director and every rented movie needs to exist in the store. How does we make sure something in another table exists before inserting new data? This lesson would teach us about foreign keys and references.CREATE TABLEdirectors (ID SERIALPRIMARY KEY, nameVARCHAR( -)UNIQUE not NULL);CREATE TABLEMovies (id SERIALPRIMARY KEY, titleVARCHAR( -) not NULL, release_date date, Count_starsINTEGER, director_idINTEGER REFERENCESdirectors (ID));Now, if we try to insert to movies table som
Tags: lease rect char LTE unique code name error STRLet's say we have a bank. Our bank wants to give each account for each user a unique name, for instance, "Personal" or "Checking." How can we do sure each account have a unique name for each user? ADD UNIQUE constraint when create a new table: CREATE TABLE directors (
PRIMARYKEY,
VARCHAR(UNIQUE notNULL
) Change existing table, modify one field to is unique: ALTER TABLE ADD CONSTRAINT UNIQUE (name) So, if we trying to insert the dupl
Number of records in table: 1578463
Select COUNT (*) from Reorder_guideline; Count---------1578463 (1 Row Records) 2. three statements creating tables CREATE TABLE: (1) most commonly used (23171.485ms) A1stream_db=> CREATE table reorder_guideline_2 as table reorder_guideline; Time: 23171.485 ms (2) with unlogged logo (1734.085ms) Create unlogged table reorder_guideline_2 as table reorder_guideline; Time: 1734.085 ms (3) temporary table with temp ID (1666.934ms) Create temp table reorder_gu
Found an article on the network http://www.linuxidc.com/Linux/2010-04/25232.htm, as follows: Ubuntu 9.10 under PostgreSQL 8. 4 solutions to forgotten passwords Ubuntu9.10 Next PostgreSQL 8. 4 Solutions to forgotten passwords:1. Edit the pg_hba.conf in the83# IPV4 Local connections:$ host All 127.0.0.1/32Trust[email protected]:/etc/postgresql/8.4/main$ sudo vim pg_hba.conf[email protected]:/etc/postgresql/8.4/main$ sudo/etc/init.d/postgresql-8.4restart* restarting PostgreSQL8.4Database Server2. [
Do you want to choose a different one? Solution a few days ago, the company needs to install the Postgresql database and add it to the Linux Service. Some scripts are as follows: case $1 in start) echo-n "Starting PostgreSQL: "su-$ PGUSER-c" $
SELECT/* comment */1;SELECT current_user;SELECT session_user;SELECT usename FROM pg_user;SELECT getpgusername ();T where (C. relkind = r) AND (N. oid = C. relnamespace) AND (A. attrelid = C. oid)AND (A. atttypid = T. oid) AND (A. attnum> 0) AND (not
In Oracle, dblink is often used to import some online data to the development database to locate the problem.
Dblink can also be used in PostgreSQL.
The following is an online document:
1. How to Create dblink in PostgreSQL?2. How do I use dblink
Update contentitem
Set "content" = regexp_replace ("content", '(\ n)', ' ')
Where
Isdeleted = false
And "content "~ * '\ N ';
The main knowledge points used are:
Regular Expression matching:
Operator
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