value, or maximum, or minimum value, and so on. Single-line functions handle each row separately, and each row returns a result.
Gyj@ocm> Select Id,sum (Salary) from T1;
Select Id,sum (Salary) from T1
*
ERROR at line 1:
Ora-00937:not a single-group group function
It is easy to understand that the ID (number) column has 10 rows of data, and sum (salary) has only one row of results. A 10 line, one row, Oracle can't combine these two columns together. A column can be used in combination with
from roles and remove privileges for help on a specific command type:help command sqoop:000>
At this point, only the client is started, the server is not connected, and if the test creates link or job, then the default connection is localhost. So, to set up a connection server first:
Sqoop:000> Set server--host 192.168.101.12--port 12000--webapp sqoop
Server is set successfully
2. Search Connector
Connector is the template that is used to crea
Switch to Oracle's HR users to practice under
1. Check the name and salary of the employee whose salary is more than 12000
Select Initcap (concat (last_name,first_name)) "name" salary from employees where salary>12000;
2. Check the employee's name and department number for employee number 176
Select Initcap (concat (last_name,first_name)) "name" department_id from employees where employee_id = 176;
3.
In order to enable CEF on the routing processor card, the IP CEF command is used in global configuration mode. To disable CEF, use the "no" format for this command.
IP CEF No IP CEF
Syntactic description
Distributed (optional) enable the DCEF operation. Spread the CEF information to the line card. The line card performs a quick forwarding.
Default condition
Platform default values
The Cisco 7000 series equipped with RSP7000 does not have CEF enabled.
CEF is not enabled in the Cisco 7200 s
Oracle-hr Table query command exercises (a complete list of select commands) switch to the oracle hr user to practice 1. query the names and salaries of employees whose salaries are greater than 12000. Select initcap (concat (last_name, first_name) "name", salary from employees where salary> 12000; 2. query the name and department number of an employee whose employee number is 176. select initcap (concat (l
graphs1, Column chart (column)
Column Example
Month
Sales
Benefits
January
8000
2000
February
12000
3000
March
18000
4000
April
2000
-1000
May
500
-2500
Tips:
1. Please click on the Right tab to see the code, the key code is marked in red
2. See the Online demo
ports to design a virtual platform (in the past, there were so-called IP base and name base virtual platforms, and now there are more Port base. The following sections describe the virtual platform). For example:
Version 1.3
BindAddress 192.168. 1.2
Port 12000
ServerName wam.spps .tp.edu.tw Listen 12000
ServerName wam.spps.tp.edu.tw: 12000
Multi-Processing
OSC job recommendation: The PHP development session is about to be held tomorrow. Today, we are eager to read more books to supplement our cultural accomplishments, when you see a parade, you can use the following features: "Shock, spectacular, mighty, magnificent, and magnificent ......" And other adjectives, so as not to say in English only when you see the spectacular scenes: "Oh my god! Gosh! God! For christ's sake !......" Php is the best language in the world, but other languages are used.
-1.99.3-bin-hadoop200/Server/webapps/sqoop/WEB-INF/lib/home/Fulong/sqoop/sqoop-1.99.3-bin-hadoop200/Server/lib
2) solve the log4j package conflict problem due to. properties configuration file common. all hadoop-related jar packages are introduced in the configuration of the loader attribute, while the lib directory of hadoop contains the log4j package, but the version is different from the log4j package of sqoop. We need to remove the sqoop-1.99.3-bin-hadoop200 under the/home/Fulong/sqoop/WEB-
-devel.Yum install php-devel2 make: *** [memcache. lo] error 1Zlib Not InstalledYum install zlib-devel3. Change the configuration command to./configure -- enable-memcache -- with-php-config =/usr/bin/php-config -- with-zlib-dir.Here, enable and with are preceded by two --)3. A message similar to this will appear after the above installation:Installing shared extensions:/usr/local/php/lib/php/extensions/no-debug-non-zts-2007xxxx/4. Modify extension_dir = "./" in php. iniExtension_dir = "/usr/loca
Modify the service port of Memcached in Windows, windowsmemcached. Modify the service port under Memcached in Windows, windowsmemcached in command mode, you can use the memcached-p12000 to specify the port, after the service installation, but there is always only the service port-drun modifies Memcached under Windows, windowsmemcached
In command mode, you can use memcached-p 12000 to specify the port. after the service is installed, the parameter-d r
processes" parameter. by adjusting the size of the root user to 12000, the number of threads also increases.
Java code
Root @ blog:/home/badqiu # ulimit-
Core file size (blocks,-c) 0
Data seg size (kbytes,-d) unlimited
Scheduling priority (-e) 0
File size (blocks,-f) unlimited
Pending signals (-I) 143360
Max locked memory (kbytes,-l) 32
Max memory size (kbytes,-m) unlimited
Open file (-n) 2048
Pipe size (512 bytes,-p) 8
POSIX message queues (bytes,
-- Master-Thl-Port = 2112 \ 6 -- Datasource-Port = 6999 \ 7 -- Datasource-mysql-conf = ./ My2.cnf \ 8 -- Datasource-user = Zty \ 9 -- Datasource-Password = Zty \ 10 -- Service-name = Sys \ 11 -- Home-directory =/home/DDB/ Liky1 \ 12 -- Thl-Port = 4112 \ 13 -- RMI-Port =12000 \ 14 -- Start-and-Report
Before the same installation, you need to confirm that the permissions are correct. At the same time, Thl-port and RMI-port are all specifi
}print (people) print (people.copy ()) Result: {' Lisi ': ' Zhangsan ': 25}{' Lisi ': 18, ' Zhangsan ': 25}Fromkeys: Creates a new dictionary with the given key, value is NoneCode: Dice = {}print (Dict.fromkeys ([' Zhangsan ', ' Lisi ')) Result: {' Lisi ': none, ' Zhangsan ': none}Items: Returns all items in the dictionary as a listCode: People = {' name ': ' Zhangsan ', ' age ': '}print ' (People.items ()) Result: [(' Age ', ' ' + '), (' Name ', ' Zhangsan ')]Pop: Specify a build, and then remo
corresponding to the IP port5MC = Memcache. Client (['192.168.1.100:45555'], debug=True)6 #修改值, there is a modification, there is no add7Mc.set ("Foo","Bar")8 #get value by key9ret = Mc.get ('Foo')Ten Printret One>>>bar1 Importmemcache2 3 #support multiple clusters to get the value from the corresponding cluster according to the weight4MC = Memcache. Client ([('1.1.1.1:12000', 1), ('1.1.1.2:12000', 2), ('1
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