18亚洲男同志videos网站,亚洲国产精品第一区二区三区,精品久久久久久亚洲精品

zhyiwww — Wed, 22 Jul 2009 09:33:00 GMT

在Postgresql�?我想取得两个旉��的差��|��以秒为单位）(j��)�Q�方法如下：(x��)

        SELECT a.*, Extract( epoch from (a.start_time - '#ivr_start#')) as gap

        FROM ivr_detail_log a
        WHERE callerid = '#callerid#'
        AND
        abs(Extract( epoch from (a.start_time - '#ivr_start#')))<20

        ORDER BY id

zhyiwww 2009-07-22 17:33 发表评论

postgres数据导出和导入操作（备䆾和恢复）(j��)

zhyiwww — Wed, 15 Jul 2009 07:39:00 GMT

数据导出主要使用的工��h��pg_dump.
比如�Q�我惛_��出数据库baijing_app

$ pg_dump -f beijing_app.sql -C -v -d -h 192.168.1.15 -U postgres beijing_app

关于参数的意义，可以参阅
http://www.postgresql.org/docs/7.4/static/app-pgdump.html

$ psql -hlocalhost -U postgres -d aadb -f beijing.sql

zhyiwww 2009-07-15 15:39 发表评论

从csv格式导入数据到postgres

zhyiwww — Wed, 15 Jul 2009 06:14:00 GMT

功能�Q�把csv里面的数据导入到postgres数据库�?br />
实现步骤�Q?br />
(1)查看数据�Q�取得所有的字段名称

"ID","CALLID","CALLERID","CALLEDID","LOGTIME","ACTION_TYPE","ACTION_DES"
5829,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?4�U?"bbbbb",
5830,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?4�U?"aaaaa","1\116.kkkk"
5831,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?3�U?"aaaaa","1\142.kkkk"
5832,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?6�U?"aaaaa","1\141.kkkk"
5833,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?7�U?"aaaaa","1\116.kkkk"
5834,76881,cccccc,tttt,2009�q?7�?3�?9�?8�?7�U?"aaaaa","1\142.kkkk"

通过上面的字�D�名�U�和下面的数据，可以知道数据的字�D�名�U�和数据�c�d��?br />
(2)�Ҏ(gu��)��字段名称和类型，写出创徏表的脚本

drop table aa_log ;

create table aa_log
(
    id int8,
    callid int8,
    callerid int8,
    calledid int8,
    logtime varchar(100),
    action_type varchar(100),
    action_des varchar(100)
);

脚本保存�?tmp/a.sql

(3)创徏数据�?br />
$ psql -hlocalhost -U postgres -d logdb -f /tmp/a.sql

执行�Q�创建数据表�?br />
(4)修改数据
上面的数据，字符串类型有"aaaaa" ,那么导入到数据库的时候，对应的��g��?x��)有�W�号"aaaaa",所以，其值实际是""aaaaa"",��Z��(ji��n)避免�q�样�Q�我们要先把数据里面�?��L��?br />在vim里面,�?s/�?/g把所有的"�W�号替换掉�?br />
5829,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?4�U?bbbbb,
5830,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?4�U?aaaaa,1\116.kkkk
5831,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?3�U?aaaaa,1\142.kkkk
5832,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?6�U?aaaaa,1\141.kkkk
5833,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?7�U?aaaaa,1\116.kkkk
5834,76881,cccccc,tttt,2009�q?7�?3�?9�?8�?7�U?aaaaa,1\142.kkkk

(5)删除title

把数据最上面的那行字�D�定义数据删除掉。否则会(x��)出现导入数据库错误�?br />

(6)导入数据
logdb=# copy aa_log from '/tmp/aa.csv' with delimiter ',';
COPY 273
logdb=#

(7)��(g��)查数�?br />
��x��Q�导入数据处理完毕�?br />

zhyiwww 2009-07-15 14:14 发表评论

Postgis的安装和配置

zhyiwww — Fri, 26 Jun 2009 08:55:00 GMT

把下面的代码存�ؓ(f��) install_postgis.sh
然后执行�?br />必须在postgres用户下执行�?br />

######################################################################
## install postgis on postgresql 8.3
##
## NOTICE:
## su to postgres user,then execute sh install_postgis.sh
##
######################################################################

dropdb postgis_template

createdb -T template1 postgis_template

createlang -d postgis_template plpgsql

cd /usr/share/postgresql-8.3-postgis

psql -d postgis_template -f lwpostgis.sql
psql -d postgis_template -f spatial_ref_sys.sql

psql -d postgis_template -c "GRANT ALL ON geometry_columns TO PUBLIC"
psql -d postgis_template -c "GRANT ALL ON spatial_ref_sys TO PUBLIC"

psql -d postgis_template -c "VACUUM FREEZE"

psql -l

zhyiwww 2009-06-26 16:55 发表评论

postgresql的安装和配置

zhyiwww — Fri, 26 Jun 2009 07:41:00 GMT

一般我们在安装postgres后，如果想用psql在控制台��d��的话�Q�是需要一炚w��|�的。主要有以下几步�Q?br />
(1)安装
aptitude install postgresql-8.3

(2)修改�pȝ��用户postgres的密�?br /> �q�个postgres是你的系�l�用戗��?br />$ su (成功�?
# passwd postgres

(3)用postgres用户��d��Q�修�Ҏ(gu��)��据库用户postgres的密�?br />在postgres用户环境下，你已�l�可以用psql��d��
$ psql -h localhost -U postgres
postgres # alter user postgres password 'postgres';

(4)在其他用户下�Q�用psql��d��
XXX $ psql -hlocalhost -U postgres
��可以登录了(ji��n)

通过上面的配�|�，��可以在本机用所有的用户��d��?ji��n)�?br />如果想通过其他的主机登录postgres数据库，�q�需要其他的配置�?br />
(5)打开监听,配置如下

配置�?br />root@zhangyi-desktop:/home/zhangyi# grep -i listen /etc/postgresql/8.3/main/postgresql.conf

# what IP address(es) to listen on;
listen_addresses = 'localhost'
# what IP address(es) to listen on;

root@zhangyi-desktop:/home/zhangyi#

配置�?br />root@zhangyi-desktop:/home/zhangyi# grep -i listen /etc/postgresql/8.3/main/postgresql.conf
listen_addresses = '*'
# what IP address(es) to listen on;
#listen_addresses = 'localhost'
# what IP address(es) to listen on;

root@zhangyi-desktop:/home/zhangyi#

(6)配置用户授权
vim /etc/postgresql/8.3/main/pg_hba.conf
��d��
host    all         all         192.168.1.0/24          md5

(7)重启postgres

# /etc/init.d/postgres restart

zhyiwww 2009-06-26 15:41 发表评论

postgres 插入timestamp�c�d��

zhyiwww — Mon, 08 Jun 2009 06:35:00 GMT

在JDBC中，我开始的��p�|的方案是�Q?br />
�Q?�Q?br />       buf.append(new java.sql.Timestamp(new Date().getTime()));
       buf.append(",");

�Q?�Q?br />                buf.append(new Date());
                buf.append(",");

(3)
               buf.append(new Timestamp(System.currentTimeMillis());
               buf.append(",");

(4)
                buf.append(new java.sql.Date(System.currentTimeMillis()));
                buf.append(",");

最后正��的�Ҏ(gu��)��?br />
       buf.append("'");
       buf.append(new java.sql.Timestamp(new Date().getTime()));
       buf.append("'");
       buf.append(",");

zhyiwww 2009-06-08 14:35 发表评论

Postgres SQL学习(f��n)

zhyiwww — Wed, 20 May 2009 09:37:00 GMT

学习(f��n)时的一些脚本，记录下来�Q?br />

drop table user_orders;

create table user_orders (
    user_id int8 references userinfos(user_id),
    order_id int8 references orders(order_id)
);

drop table user_orders;

create table user_orders (
    user_id int8,
    order_id int8,
    foreign key (user_id) references userinfos(user_id),
    foreign key (order_id) references orders(order_id)
);
drop table partners;
create table partners
(
partner_id int8 primary key,
partner_name varchar(80)
);

drop table partner_tables;

create table partner_orders
(
    partner_id int8 references partners(partner_id),
    order_id int8 references orders(order_id),

    primary key (partner_id,order_id)

);

drop table prepaid_cards;

create table prepaid_cards
(
    prepaid_card_id int8 primary key,
    price float
)

drop table packages;

create table packages
(
package_id int8 primary key,
package_name varchar(80)
);

drop table package_cards;

create table package_cards
(
package_id int8 references packages(package_id),
prepaid_card_id int8 references prepaid_cards(prepaid_card_id),

primary key (package_id,prepaid_card_id)
);

drop table prepaid_cards;

create table prepaid_cards
(

    prepaid_card_id int8 primary key,
    prepaid_card_no varchar(30)

)

drop table order_detials;

create table order_detials
(
    order_id int8 references orders(order_id),
    package_id int8 references packages(package_id),
    count int4 ,
    primary key (order_id,package_id)
)

drop table aa;

create table aa
(
user_id int8 default nextval('seq_user_id') primary key ,
user_name varchar(40)
);

drop table category;

create table category
(
    category_id int8 primary key,
    parent_id int8 references category(category_id),
    category_name varchar(80)
);

drop sequence seq_category_id ;
create sequence seq_category_id increment 1 start 300000;

alter table category alter column category_id set default nextval('seq_category_id');

zhyiwww 2009-05-20 17:37 发表评论

创徏序列�q�绑定到字段

zhyiwww — Tue, 19 May 2009 05:59:00 GMT

(1)create sequence seq_user_id increment 1 start 20000;

(2)alter table userinfos alter column user_id set default nextval('seq_user_id');

(3)create table userinfos
(
user_id int8 default nextval('seq_user_id') primary key
user_name varchar(40)
)

zhyiwww 2009-05-19 13:59 发表评论

zhyiwww — Fri, 15 May 2009 03:47:00 GMT

SQL 如下�Q?br />�Q?�Q?br />
drop table user_orders;

create table user_orders (
        user_id int8 references userinfos(user_id),
        order_id int8 references orders(order_id)
);

�Q?�Q?br />
drop table user_orders;

create table user_orders (
        user_id int8,
        order_id int8,
        foreign key (user_id) references userinfos(user_id),
        foreign key (order_id) references orders(order_id)
);

�D�途同归�?br />

zhyiwww 2009-05-15 11:47 发表评论

zhyiwww — Wed, 18 Mar 2009 09:52:00 GMT

$ createuser -hlocalhost -U postgres -lrd -P ttt
Enter password for new role:
Enter it again:
Shall the new role be a superuser? (y/n) y

上面的命令就可以实现在postgres上创建用�?br />
删除用户
$ dropuser zhangyi -U postgres -hlocalhost

zhyiwww 2009-03-18 17:52 发表评论

在debian上安装postgresql

zhyiwww — Wed, 18 Mar 2009 09:14:00 GMT

[1]��d��?br />�~�辑/etc/apt/sources.list,在文件后面添加如下内�?br />## postgres 8.3
deb http://www.backports.org/debian etch-backports main contrib non-free

[2] aptitude update

[3]aptitude search postgres | grep 8.3
列出所有的postgresql 8.3版本的相兛_��Q�根据自��q��需要安�?server /client ��可以了(ji��n)

[4]配置其他的用��L(f��ng)��q�接授权
默认�Q�只能在postgres用户下连接，如果惛_��其他的用户下面也能连接，需要作一下配�|?br />
# vim /etc/postgresql/8.3/main/pg_hba.conf
修改如下部分

80 # IPv4 local connections:
81 host    all         all         127.0.0.1/32            trust
82 host    all         all         192.168.1.0/24          trust

# /etc/postgresql/8.3/main/postgresql.conf
修改如下部分

56 #listen_addresses = 'localhost'         # what IP address(es) to listen on;
57 listen_addresses = '*'          # what IP address(es) to listen on;

[5]启动postgresql服务

# /etc/init.d/postgresql-8.3 start

[6] 在其他的用户��试�q�接��可以了(ji��n)

    $psql -U postgres template1

如果能连上，��p��C�ok�?ji��n)�?br />

zhyiwww 2009-03-18 17:14 发表评论