DM8达梦数据库tpch测试步骤
2024-04-17 23:56:26
此篇文档只介绍了如何在DM8上使用测试工具进行tpch测试的步骤，关于参数性能优化方面的内容不做介绍。
更多达梦数据库相关问题，请浏览云适配技术社区。达梦云适配技术社区
https://eco.dameng.com/1.准备tpch测试工具benchmark
2.生成.tbl数据文件
利用degen工具模拟生成1G的数据
cd /ceshi/tpch/linux/tpch_dbgen./dbgen -s 1会在当前目录下生成数据源文件，用来之后dmfldr导入的元数据。
3.修改每个表的dmfldr控制文件
修改下面8个表对应的导入控制文件
vi customer.ctrl
vi lineitem.ctrl
vi nation.ctrl
vi orders.ctrl
vi part.ctrl
vi partsupp.ctrl
vi region.ctrl
vi supplier.ctrl
以下是customer表的示例修改
4创建表的结构
执行下面的sql语句用来创建表的结构
drop table customer;
drop table lineitem;
drop table nation;
drop table orders;
drop table part;
drop table partsupp;
drop table region;
drop table supplier; create huge table CUSTOMER
(
C_CUSTKEY int not null,
C_NAME varchar(25) not null,
C_ADDRESS varchar(40) not null,
C_NATIONKEY int not null,
C_PHONE char(15) not null,
C_ACCTBAL float not null,
C_MKTSEGMENT char(10) not null,
C_COMMENT varchar(117) not null,
primary key (C_CUSTKEY)
); create huge table LINEITEM
(
L_ORDERKEY int not null,
L_PARTKEY int not null,
L_SUPPKEY int not null,
L_LINENUMBER int not null,
L_QUANTITY float not null,
L_EXTENDEDPRICE float not null,
L_DISCOUNT float not null,
L_TAX float not null,
L_RETURNFLAG char(1) not null,
L_LINESTATUS char(1) not null,
L_SHIPDATE date not null,
L_COMMITDATE date not null,
L_RECEIPTDATE date not null,
L_SHIPINSTRUCT char(25) not null,
L_SHIPMODE char(10) not null,
L_COMMENT varchar(44) not null,
primary key(L_ORDERKEY , L_LINENUMBER)
); create huge table NATION
(
N_NATIONKEY int not null,
N_NAME char(25) not null,
N_REGIONKEY int not null,
N_COMMENT varchar(152) not null,
primary key (N_NATIONKEY)
); create huge table ORDERS
(
O_ORDERKEY int not null,
O_CUSTKEY int not null,
O_ORDERSTATUS char(1) not null,
O_TOTALPRICE float not null,
O_ORDERDATE date not null,
O_ORDERPRIORITY char(15) not null,
O_CLERK char(15) not null,
O_SHIPPRIORITY integer not null,
O_COMMENT varchar(79) not null,
primary key(O_ORDERKEY)
); create huge table part
(
P_PARTKEY int not null,
P_NAME varchar(55) not null,
P_MFGR char(25) not null,
P_BRAND char(10) not null,
P_TYPE varchar(25) not null,
P_SIZE int not null,
P_CONTAINER char(10) not null,
P_RETAILPRICE float not null,
P_COMMENT varchar(23) not null,
primary key (P_PARTKEY)
); create huge table PARTSUPP
(
PS_PARTKEY int not null,
PS_SUPPKEY int not null,
PS_AVAILQTY int not null,
PS_SUPPLYCOST float not null,
PS_COMMENT varchar(199) not null, primary key (PS_PARTKEY , PS_SUPPKEY)
); create huge table REGION
(
R_REGIONKEY int not null,
R_NAME char(25) not null,
R_COMMENT varchar(152) not null,
primary key (R_REGIONKEY)
); create huge table SUPPLIER
(
S_SUPPKEY int not null,
S_NAME char(25) not null,
S_ADDRESS varchar(40) not null,
S_NATIONKEY int not null,
S_PHONE char(15) not null,
S_ACCTBAL float not null,
S_COMMENT varchar(101) not null,
primary key (S_SUPPKEY)
); 5.加载数据
使用dmfldr工具导入数据
cd /home/dmdba/dmdbms/bin/./dmfldr userid=SYSDBA/SYSDBA:5236 control=\'/ceshi/tpch/linux/customer.ctrl\'./dmfldr userid=SYSDBA/SYSDBA:5236 control=\'/ceshi/tpch/linux/lineitem.ctrl\'./dmfldr userid=SYSDBA/SYSDBA:5236 control=\'/ceshi/tpch/linux/nation.ctrl\'./dmfldr userid=SYSDBA/SYSDBA:5236 control=\'/ceshi/tpch/linux/orders.ctrl\'./dmfldr userid=SYSDBA/SYSDBA:5236 control=\'/ceshi/tpch/linux/partsupp.ctrl\'./dmfldr userid=SYSDBA/SYSDBA:5236 control=\'/ceshi/tpch/linux/part.ctrl\'./dmfldr userid=SYSDBA/SYSDBA:5236 control=\'/ceshi/tpch/linux/region.ctrl\'./dmfldr userid=SYSDBA/SYSDBA:5236 control=\'/ceshi/tpch/linux/supplier.ctrl\'6.更新统计信息
执行下面的sql信息更新统计信息
--删除表上所有列的统计信息
CALL SP_TAB_COL_STAT_DEINIT ('SYSDBA', 'CUSTOMER');
CALL SP_TAB_COL_STAT_DEINIT ('SYSDBA', 'LINEITEM');
CALL SP_TAB_COL_STAT_DEINIT ('SYSDBA', 'NATION');
CALL SP_TAB_COL_STAT_DEINIT ('SYSDBA', 'ORDERS');
CALL SP_TAB_COL_STAT_DEINIT ('SYSDBA', 'PART');
CALL SP_TAB_COL_STAT_DEINIT ('SYSDBA', 'PARTSUPP');
CALL SP_TAB_COL_STAT_DEINIT ('SYSDBA', 'REGION');
CALL SP_TAB_COL_STAT_DEINIT ('SYSDBA', 'SUPPLIER');
--删除表的统计信息
CALL SP_TAB_STAT_DEINIT ('SYSDBA', 'CUSTOMER');
CALL SP_TAB_STAT_DEINIT ('SYSDBA', 'LINEITEM');
CALL SP_TAB_STAT_DEINIT ('SYSDBA', 'NATION');
CALL SP_TAB_STAT_DEINIT ('SYSDBA', 'ORDERS');
CALL SP_TAB_STAT_DEINIT ('SYSDBA', 'PART');
CALL SP_TAB_STAT_DEINIT ('SYSDBA', 'PARTSUPP');
CALL SP_TAB_STAT_DEINIT ('SYSDBA', 'REGION');
CALL SP_TAB_STAT_DEINIT ('SYSDBA', 'SUPPLIER');
--更新统计信息
SP_TAB_STAT_INIT('SYSDBA','REGION');
SP_TAB_STAT_INIT('SYSDBA','NATION');
SP_TAB_STAT_INIT('SYSDBA','PART');
SP_TAB_STAT_INIT('SYSDBA','PARTSUPP');
SP_TAB_STAT_INIT('SYSDBA','SUPPLIER');
SP_TAB_STAT_INIT('SYSDBA','CUSTOMER');
SP_TAB_STAT_INIT('SYSDBA','ORDERS');
SP_TAB_STAT_INIT('SYSDBA','LINEITEM');STAT 100 ON REGION(R_NAME) ;
STAT 100 ON REGION(R_REGIONKEY) ;
STAT 100 ON NATION(N_NAME) ;
STAT 100 ON NATION(N_NATIONKEY) ;
STAT 100 ON NATION(N_REGIONKEY) ;
STAT 100 ON SUPPLIER(S_SUPPKEY) ;
STAT 100 ON SUPPLIER(S_NATIONKEY) ;
STAT 100 ON SUPPLIER(S_COMMENT) ;STAT 100 ON PART(P_SIZE);
STAT 100 ON PART(P_BRAND);
STAT 100 ON PART(P_TYPE);
STAT 100 ON PART(P_NAME);
STAT 100 ON PART(P_PARTKEY);
STAT 100 ON PART(P_CONTAINER);STAT 100 ON PARTSUPP(PS_SUPPKEY);
STAT 100 ON PARTSUPP(PS_PARTKEY);STAT 100 ON ORDERS(O_ORDERKEY);
STAT 100 ON ORDERS(O_ORDERDATE);
STAT 100 ON ORDERS(O_ORDERSTATUS);
STAT 100 ON ORDERS(O_ORDERPRIORITY);
STAT 100 ON ORDERS(O_CUSTKEY);
STAT 100 ON ORDERS(O_COMMENT);STAT 100 ON LINEITEM(L_SUPPKEY);
STAT 100 ON LINEITEM(L_PARTKEY);
STAT 100 ON LINEITEM(L_ORDERKEY);
STAT 100 ON LINEITEM(L_SHIPDATE);
STAT 100 ON LINEITEM(L_SHIPMODE);
STAT 100 ON LINEITEM(L_COMMITDATE);
STAT 100 ON LINEITEM(L_RECEIPTDATE);
STAT 100 ON LINEITEM(L_RETURNFLAG);
STAT 100 ON LINEITEM(L_LINESTATUS);
STAT 100 ON LINEITEM(L_QUANTITY);
STAT 100 ON LINEITEM(L_SHIPINSTRUCT);STAT 100 ON CUSTOMER(C_CUSTKEY);
STAT 100 ON CUSTOMER(C_MKTSEGMENT);
STAT 100 ON CUSTOMER(C_NATIONKEY);
STAT 100 ON CUSTOMER(C_ACCTBAL);7.测试语句执行时间
下方sql为测试的sql语句
--Q1(LINEITEM)
select l_returnflag, l_linestatus, sum(l_quantity) as sum_qty, sum(l_extendedprice) as sum_base_price, sum(l_extendedprice*(1-l_discount)) as sum_disc_price, sum(l_extendedprice*(1-l_discount)*(1+l_tax)) as sum_charge, avg(l_quantity) as avg_qty, avg(l_extendedprice) as avg_price, avg(l_discount) as avg_disc, count(*) as count_order
from lineitem
where l_shipdate <= date'1998-12-01' - interval '90' day
group by l_returnflag, l_linestatus
order by l_returnflag, l_linestatus;
--Q2
select TOP 100 s_acctbal, s_name, n_name, p_partkey, p_mfgr, s_address, s_phone, s_comment
from part, supplier, partsupp, nation, region
where p_partkey = ps_partkey and s_suppkey = ps_suppkey and p_size = 15 and p_type like '%BRASS' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'EUROPE' and ps_supplycost = ( select min(ps_supplycost) from partsupp, supplier, nation, region where p_partkey = ps_partkey and s_suppkey = ps_suppkey and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'EUROPE' ) order by s_acctbal desc, n_name, s_name, p_partkey;
--Q3
select TOP 10 l_orderkey, sum(l_extendedprice*(1-l_discount)) as revenue, o_orderdate, o_shippriority
from customer, orders, lineitem
where c_mktsegment = 'BUILDING' and c_custkey = o_custkey and l_orderkey = o_orderkey and o_orderdate < date'1995-03-15' and l_shipdate > date'1995-03-15'
group by l_orderkey, o_orderdate, o_shippriority
order by revenue desc, o_orderdate;
--Q4
select o_orderpriority, count(*) as order_count
from orders
where o_orderdate >= date'1993-07-01' and o_orderdate < date '1993-07-01' + interval '3' month and exists (select * from lineitem where l_orderkey = o_orderkey and l_commitdate < l_receiptdate ) group by o_orderpriority order by o_orderpriority;
--Q5
select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue
from customer, orders, lineitem, supplier, nation, region
where c_custkey = o_custkey and l_orderkey = o_orderkey and l_suppkey = s_suppkey and c_nationkey = s_nationkey and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'ASIA' and o_orderdate >= date'1994-01-01' and o_orderdate < date '1994-01-01' + interval '1' year
group by n_name
order by revenue desc;
--Q6
select sum(l_extendedprice*l_discount) as revenue
from lineitem
where l_shipdate >= '1994-01-01' and l_shipdate < dateadd(year,1, '1994-01-01') and l_discount between 0.06 - 0.01 and 0.06 + 0.01 and l_quantity < 24;
--Q7
select supp_nation, cust_nation, l_year, sum(volume) as revenue
from ( select n1.n_name as supp_nation, n2.n_name as cust_nation, extract(year from l_shipdate) as l_year, l_extendedprice * (1 - l_discount) as volume from supplier, lineitem, orders, customer, nation n1, nation n2 where s_suppkey = l_suppkey and o_orderkey = l_orderkey and c_custkey = o_custkey and s_nationkey = n1.n_nationkey and c_nationkey = n2.n_nationkey and ( (n1.n_name = 'FRANCE' and n2.n_name = 'GERMANY') or (n1.n_name = 'GERMANY' and n2.n_name = 'FRANCE') ) and l_shipdate between date'1995-01-01' and date'1996-12-31' ) as shipping group by supp_nation, cust_nation, l_year order by supp_nation, cust_nation, l_year;
--Q8
select o_year, sum(case when nation = 'BRAZIL' then volume else 0 end) / sum(volume) as mkt_share
from ( select extract(year from o_orderdate) as o_year, l_extendedprice * (1-l_discount) as volume, n2.n_name as nation from part, supplier, lineitem, orders, customer, nation n1, nation n2, region where p_partkey = l_partkey and s_suppkey = l_suppkey and l_orderkey = o_orderkey and o_custkey = c_custkey and c_nationkey = n1.n_nationkey and n1.n_regionkey = r_regionkey and r_name = 'AMERICA' and s_nationkey = n2.n_nationkey and o_orderdate between date '1995-01-01' and date '1996-12-31' and p_type = 'ECONOMY ANODIZED STEEL' ) as all_nations group by o_year order by o_year;
--Q9
select nation, o_year, sum(amount) as sum_profit
from ( select n_name as nation, extract(year from o_orderdate) as o_year, l_extendedprice * (1 - l_discount) - ps_supplycost * l_quantity as amount from part, supplier, lineitem, partsupp, orders, nation where s_suppkey = l_suppkey and ps_suppkey = l_suppkey and ps_partkey = l_partkey and p_partkey = l_partkey and o_orderkey = l_orderkey and s_nationkey = n_nationkey and p_name like '%green%' ) as profit
group by nation, o_year
order by nation, o_year desc;
--Q10
select top 20 c_custkey, c_name, sum(l_extendedprice * (1 - l_discount)) as revenue, c_acctbal, n_name, c_address, c_phone, c_comment
from customer, orders, lineitem, nation
where c_custkey = o_custkey and l_orderkey = o_orderkey and o_orderdate >= date'1993-10-01' and o_orderdate < date'1993-10-01' + interval '3' month and l_returnflag = 'R' and c_nationkey = n_nationkey
group by c_custkey, c_name, c_acctbal, c_phone, n_name, c_address, c_comment
order by revenue desc;
--Q11
select ps_partkey, sum(ps_supplycost * ps_availqty) as valuess
from partsupp, supplier, nation
where ps_suppkey = s_suppkey and s_nationkey = n_nationkey and n_name = 'GERMANY'
group by ps_partkey
having sum(ps_supplycost * ps_availqty) > ( select sum(ps_supplycost * ps_availqty) * 0.0001 from partsupp, supplier, nation where ps_suppkey = s_suppkey and s_nationkey = n_nationkey and n_name = 'GERMANY' )
order by valuess desc;
--Q12
select l_shipmode, sum(case when o_orderpriority ='1-URGENT' or o_orderpriority ='2-HIGH' then 1 else 0 end) as high_line_count, sum(case when o_orderpriority <> '1-URGENT' and o_orderpriority <> '2-HIGH' then 1 else 0 end) as low_line_count
from orders, lineitem
where o_orderkey = l_orderkey and l_shipmode in ('MAIL', 'SHIP') and l_commitdate < l_receiptdate and l_shipdate < l_commitdate and l_receiptdate >= date '1994-01-01' and l_receiptdate < date '1994-01-01' + interval '1' year
group by l_shipmode
order by l_shipmode;
--Q13
select c_count, count(*) as custdist
from ( select c_custkey, count(o_orderkey) from customer left outer join orders on c_custkey = o_custkey and o_comment not like '%special%requests%' group by c_custkey )as c_orders (c_custkey, c_count)
group by c_count
order by custdist desc, c_count desc;
--Q14
select 100.00 * sum(case when p_type like 'PROMO%' then l_extendedprice*(1-l_discount) else 0 end) / sum(l_extendedprice * (1 - l_discount)) as promo_revenue
from lineitem, part
where l_partkey = p_partkey and l_shipdate >= date '1995-09-01' and l_shipdate < date'1995-09-01' + interval '1' month;
--Q15
create view revenue (supplier_no, total_revenue) as
select l_suppkey, sum(l_extendedprice * (1 - l_discount)) from lineitem
where l_shipdate >= date '1996-01-01' and l_shipdate < date '1996-01-01' + interval '3' month group by l_suppkey;
select s_suppkey, s_name, s_address, s_phone, total_revenue
from supplier, revenue
where s_suppkey = supplier_no and total_revenue = ( select max(total_revenue) from revenue ) order by s_suppkey;
drop view revenue;
--Q16
select p_brand, p_type, p_size, count(distinct ps_suppkey) as supplier_cnt
from partsupp, part
where p_partkey = ps_partkey and p_brand <> 'Brand#45' and p_type not like 'MEDIUM POLISHED%' and p_size in (49, 14, 23, 45, 19, 3, 36, 9) and ps_suppkey not in ( select s_suppkey from supplier where s_comment like '%Customer%Complaints%' )
group by p_brand, p_type, p_size
order by supplier_cnt desc, p_brand, p_type, p_size;
--Q17
select sum(l_extendedprice) / 7.0 as avg_yearly
from lineitem, part
where p_partkey = l_partkey and p_brand = 'Brand#23' and p_container = 'MED BOX' and l_quantity < ( select 0.2 * avg(l_quantity) from lineitem where l_partkey = p_partkey );
--Q18
select top 100 c_name, c_custkey, o_orderkey, o_orderdate, o_totalprice, sum(l_quantity)
from customer, orders, lineitem
where o_orderkey in ( select l_orderkey from lineitem group by l_orderkey having sum(l_quantity) > 300 ) and c_custkey = o_custkey and o_orderkey = l_orderkey
group by c_name, c_custkey, o_orderkey, o_orderdate, o_totalprice
order by o_totalprice desc, o_orderdate;
--Q19
select sum(l_extendedprice * (1 - l_discount) ) as revenue
from lineitem, part
where ( p_partkey = l_partkey and p_brand = 'Brand#12' and p_container in ( 'SM CASE', 'SM BOX', 'SM PACK', 'SM PKG') and l_quantity >= 1 and l_quantity <= 1 + 10 and p_size between 1 and 5 and l_shipmode in ('AIR', 'AIR REG') and l_shipinstruct = 'DELIVER IN PERSON' )
or ( p_partkey = l_partkey and p_brand = 'Brand#23' and p_container in ('MED BAG', 'MED BOX', 'MED PKG', 'MED PACK') and l_quantity >= 10 and l_quantity <= 10 + 10 and p_size between 1 and 10 and l_shipmode in ('AIR', 'AIR REG') and l_shipinstruct = 'DELIVER IN PERSON' )
or ( p_partkey = l_partkey and p_brand = 'Brand#34' and p_container in ( 'LG CASE', 'LG BOX', 'LG PACK', 'LG PKG') and l_quantity >= 20 and l_quantity <= 20 + 10 and p_size between 1 and 15 and l_shipmode in ('AIR', 'AIR REG') and l_shipinstruct = 'DELIVER IN PERSON' );
--Q20
select s_name, s_address
from supplier, nation
where s_suppkey in ( select ps_suppkey from partsupp where ps_partkey in ( select p_partkey from part where p_name like 'forest%' ) and ps_availqty > ( select 0.5 * sum(l_quantity) from lineitem where l_partkey = ps_partkey and l_suppkey = ps_suppkey and l_shipdate >= date '1994-01-01' and l_shipdate < date '1994-01-01' + interval '1' year ) ) and s_nationkey = n_nationkey and n_name = 'CANADA'
order by s_name;
--Q21
select top 100 s_name, count(*) as numwait
from supplier, lineitem l1, orders, nation
where s_suppkey = l1.l_suppkey and o_orderkey = l1.l_orderkey and o_orderstatus = 'F' and l1.l_receiptdate > l1.l_commitdate and exists ( select * from lineitem l2 where l2.l_orderkey = l1.l_orderkey and l2.l_suppkey <> l1.l_suppkey ) and not exists ( select * from lineitem l3 where l3.l_orderkey = l1.l_orderkey and l3.l_suppkey <> l1.l_suppkey and l3.l_receiptdate > l3.l_commitdate ) and s_nationkey = n_nationkey and n_name = 'SAUDI ARABIA'
group by s_name
order by numwait desc, s_name;
--Q22
select cntrycode, count(*) as numcust, sum(c_acctbal) as totacctbal
from ( select substring(c_phone from 1 for 2) as cntrycode, c_acctbal from customer where substring(c_phone from 1 for 2) in ('13','31','23','29','30','18','17') and c_acctbal > ( select avg(c_acctbal) from customer where c_acctbal > 0.00 and substring (c_phone from 1 for 2) in ('13','31','23','29','30','18','17') ) and not exists ( select * from orders where o_custkey = c_custkey ) ) as custsale
group by cntrycode
order by cntrycode;下方为Q22的测试运行时间
DM8达梦数据库tpch测试步骤相关推荐
- DM8:达梦数据库DEM--dmagent监控服务器代理部署（详细步骤）
DM8:达梦数据库DEM部署dmagent代理环境(详细步骤) 1 dmagent代理下载部署 1.1通过web DEM下载代理包 1.2 从数据库服务器目录直接拷贝dmagent 2 部署JDK环境 ...
- 达梦数据库tpcc测试
达梦数据库tpcc测试 随着达梦数据库越来越流行,数据库性能测试成为日常DBA或运维人员必备技能知识,常见的性能测试工具有jemeter.loadrunner.tpcc.tpc-h等软件.常见的测试软 ...
- DM8:达梦数据库定时自动全库备份与删除备份
DM8:达梦数据库定时自动全库备份与删除备份 环境介绍 1 备份条件 2 测试手动备份是否成功 2.1 报错 -718 2.2 错误解决方法 方法1: 在数据库执行SQL 方法2:重启 数据库实例服务 ...
- DM8达梦数据库安装及卸载方法
DM8达梦数据库安装及windows环境创建数据库实例和注册数据库服务 硬件环境需求 软件环境需求 windows下安装和卸载 安装 卸载 linux下安装和卸载 安装 卸载 硬件环境需求 名称 要求 ...
- DM8:达梦数据库下载地址
DM8:达梦数据库下载地址 [达梦数据库下载地址]–>点我下载 https://eco.dameng.com/download/
- DM8:达梦数据库dexp-DMP逻辑导出按用户模式定时自动备份数据库
DM8:达梦数据库dexp-DMP逻辑导出按用户模式定时自动备份数据库 环境介绍 1 编写脚本&配置文件 1.1编写shell脚本备份数据库 1.2 编写dm_conf 配置文件 1.3 编写 ...
- Cas5.3服务器集成DM8 达梦数据库
DM8达梦数据库相关准备 1.安装DM8达梦数据库并安装相关数据库实例 省略一千字*** 2.新建ucas_auth_user表,并增加相关用户条记录 DROP TABLE IF EXISTS `uc ...
- DM8达梦数据库体系结构详解
DM8达梦数据库体系结构详解 1.逻辑结构 1.1 表空间 1.2 段 1.3 簇 1.4 页 2.物理结构 2.1 数据文件 2.2 控制文件 2.3 重做日志文件 2.4 归档日志文件 2.5 配 ...
- DM8达梦数据库数据文件整体迁移方式
目录 一.前要 二.模拟环境准备: 三.名词定义 3.1 表空间和数据文件 3.2 重做日志(redo) 3.3 控制文件(dm.ctl) 3.4 参数文件(dm.ini) 3.5 dminit工具 ...
最新文章
- 7-2 然后是几点 （Java）
- 分布式系统用户登录路由
- Linux Versus Windows, Ubuntu/Mint V XP/Vista/7
- mysql常用表名大全_MySQL常用命令大全
- C++ vector中的resize，reserve，size和capacity函数讲解
- Hadoop生态hive（一）介绍
- java DOM4J 读取XML
- [Xilinx]Xilinx ISE14.2中调用文本编辑器NotePad++设置方法
- 策略为王编译错误2：error C1189: #error : MFC does not support
- MSIL实用指南-一维数组的操作
- ie型lfsr_线性反馈移位寄存器原理与实现 - 全文
- linux 下好用的音乐播放器介绍（转载）
- 英语时态，看到过的最好讲解没有之一
- 部署RPA如何实现投资回报率最大化？评估ROI的6大指标
- 网络安全兼职注意事项
- 国服最强王者之最良心王者
- 如果你不想像中兴跳楼程序员那样，2018年就应该做这8件事，别再等到中年危机了
- 广义表的存储结构--头尾链表存储表示/扩展线性链表存储表示
- RNN 、LSTM、 GRU、Bi-LSTM 等常见循环网络结构以及其Pytorch实现
- 小初高四字成语学习笔记