在pgAdmin中将整个数据库（其结构和数据）复制到新数据库的正确方法是什么？

答覆：

CREATE DATABASE newdb WITH TEMPLATE originaldb;

经过尝试和测试。

要使用postgres克隆现有数据库，您可以这样做

/* KILL ALL EXISTING CONNECTION FROM ORIGINAL DB (sourcedb)*/
SELECT pg_terminate_backend(pg_stat_activity.pid) FROM pg_stat_activity 
WHERE pg_stat_activity.datname = 'SOURCE_DB' AND pid <> pg_backend_pid();

/* CLONE DATABASE TO NEW ONE(TARGET_DB) */
CREATE DATABASE TARGET_DB WITH TEMPLATE SOURCE_DB OWNER USER_DB;

IT将终止与源数据库的所有连接，以避免错误

ERROR:  source database "SOURCE_DB" is being accessed by other users

贝尔回答的命令行版本：

createdb -O ownername -T originaldb newdb

这应该在数据库主机（通常是postgres）的权限下运行。

用模板创建数据库新数据库originaldb所有者dbuser；

如果你使用过Ubuntu。1路createdb-O所有者-T old_db_name new_db_name

2路创建数据库测试副本pg_dump old_db_name | psql测试副本

如果数据库具有打开的连接，则此脚本可能会有所帮助。我每天晚上都用这个从实时生产数据库的备份中创建一个测试数据库。这假设您有一个来自生产数据库的.SQL备份文件（我在webmin中执行此操作）。

#!/bin/sh

dbname="desired_db_name_of_test_enviroment"
username="user_name"
fname="/path to /ExistingBackupFileOfLive.sql"

dropdbcmp="DROP DATABASE $dbname"
createdbcmd="CREATE DATABASE $dbname WITH OWNER = $username "

export PGPASSWORD=MyPassword



echo "**********"
echo "** Dropping $dbname"
psql -d postgres -h localhost -U "$username" -c "$dropdbcmp"

echo "**********"
echo "** Creating database $dbname"
psql -d postgres -h localhost -U "$username" -c "$createdbcmd"

echo "**********"
echo "** Loading data into database"
psql -d postgres -h localhost -U "$username" -d "$dbname" -a -f "$fname"

对于那些仍然感兴趣的人，我提出了一个bash脚本，它（或多或少）满足了作者的需求。我必须在生产系统上制作一份每日业务数据库副本，这个脚本似乎很有用。请记住更改数据库名称/user/pw值。

#!/bin/bash

if [ 1 -ne $# ]
then
  echo "Usage `basename $0` {tar.gz database file}"
  exit 65;
fi

if [ -f "$1" ]
then
  EXTRACTED=`tar -xzvf $1`
  echo "using database archive: $EXTRACTED";
else
  echo "file $1 does not exist"
  exit 1
fi


PGUSER=dbuser
PGPASSWORD=dbpw
export PGUSER PGPASSWORD

datestr=`date +%Y%m%d`


dbname="dbcpy_$datestr"
createdbcmd="CREATE DATABASE $dbname WITH OWNER = postgres ENCODING = 'UTF8' TABLESPACE = pg_default LC_COLLATE = 'en_US.UTF-8' LC_CTYPE = 'en_US.UTF-8' CONNECTION LIMIT = -1;"
dropdbcmp="DROP DATABASE $dbname"

echo "creating database $dbname"
psql -c "$createdbcmd"

rc=$?
if [[ $rc != 0 ]] ; then
  rm -rf "$EXTRACTED"
  echo "error occured while creating database $dbname ($rc)"
  exit $rc
fi


echo "loading data into database"
psql $dbname < $EXTRACTED > /dev/null

rc=$?

rm -rf "$EXTRACTED"

if [[ $rc != 0 ]] ; then
  psql -c "$dropdbcmd"
  echo "error occured while loading data to database $dbname ($rc)"
  exit $rc
fi


echo "finished OK"