Hive simple instructions for use, hive simple instructions for use
I usage:
Hive: Start hive
The command must end with a semicolon and tell hive to execute the command immediately, case insensitive.
Show tables; View tables
Desc tablename; view the columns in the table
Write SQL commands
Use udw;
Select user_id, action_id
From udw_ml_user_action
Where partition_date gt; = 20150410
Distribute b
SSDB basic instructions and usage, SSDB basic instructions
There are several reasons for using SSDB at that time. First, when designing the contest module, You need to query the Rank of the current competition multiple times because you click to query the Rank of the current competition, the amount of data queried each time is large. to efficiently obtain data, the SSDB database is used. The second aspect i
A to enter the 7-line command and Run Command e to modify the value from ~ 2000: F value, view the modified part
MoV ax, 2000; Save the number H to the Register ax
MoV SS, ax; Save the number 2000h in the register ax to the stack segment register SS
MoV sp, 10; Save the number 10 h to the stack address register sp
The initial stack top is, and the initial stack bottom is.
2. debug each line of Assembly commands in one step. After each command is debugged in one step, run the D command to view
stack is 2000:0010, mov sp, 10, after reading the information, we found that 10 Memory Spaces are reserved for the following registers, such as CS.
As for the interrupt mechanism written in the book, that is, every time debug uses t to execute the command, it will stop executing and display the status of each memory and the next operation. The above mov SS, 10 must have been executed, however, the next stack cannot completely restore the state of the memory in the previous step, so the value of
= 6462 H
Push [4]; SP = 00feh. The modified memory unit address is 2200: 00fe. The content is 3534 H.
Push [6]; SP = 00fch. The modified memory unit address is 2200: 00fc content is 3736 H.
Rewrite with the E command, and write with the command:
Result of one-step operation:
Data in the stack address:
(2) observe the experiment process shown in Figure 3.19 and analyze the cause ~ 2000: will the content in F change?
Figure 3.19 example of an experiment using debug
A: The use of
UE-9260 instructions for use 2, ue-9260 instructions for useGenerate an image
1. U-boot
Generate u-boot.bin files
(1) Makefile
Ifeq ($ (ARCH), arm)
CROSS_COMPILE =
Endif
Change
Ifeq ($ (ARCH), arm)
CROSS_COMPILE =/opt/crosstool/gcc-3.4.5-glibc-2.3.6/arm-softfloat-linux-gnu/bin/arm-softfloat-linux-gnu-
Endif
(2) makeV1.1.5
$ Make mrproper
$ Make at91sam9260ek_config
$ Make dep
$ Make
V1.3.4
$ Make distclea
Jsp learning notes: Action instructions, jsp learning notes instructions
Jsp: forward:
Statement 1:
Statement 2:
In statement 2,
Note: jsp: When forward specifies a page, jsp expressions can also be used, such:
Include:
Dynamically import a page in the same format as forward.
Differences from static import:
1. In servlet, static import integrates the two into a complete Servlet, while dynamic import
JSON. NET simple instructions, json.net simple instructions
NewtonJson is a commonly used json Parsing Library. Basically, this library is used in my project. It also has related libraries in Unity, which ensures the unification of multiple projects. At the same time, NewtonJson's serialization and deserialization interfaces are relatively simple and powerful. However, there are no pitfalls in use, so I wil
4.
1.
Experiment conclusion
2.
.
After two single-step operations in Experiment 2, we found that mov ax, 2000; MoV SS, ax; MoV sp, and 10 operations were run. The results returned when only the first three operations are written and run are the same.
Shows the data in the memory area when no operation is performed.
The data in the corresponding memory area after two single-step operations is the same as the original value.
Ax, the IP value is the same as the value in memo
The MOV instruction is a dual-operand instruction and cannot be fully memory-operated in two operandsFormat: MOV dst,srcPerform action: DST Note:1. The destination number can be a universal register, a memory unit, and a segment register (but not a CS segment register).2. Immediate number cannot send segment register directly3. Does not allow data to be transmitted directly to two storage units4. No direct transfer of information between two segment registers is allowedAssembly Language Learning
Chrony software instructions for use, chrony instructions for use1.1.1 chrony Introduction
Chrony is an open-source free software that can keep the system clock synchronized with the clock server (NTP) and keep the time accurate.
It consists of two programs: chronyd and chronyc.
Chronyd is a daemon running in the background. It is used to adjust the system clock running in the kernel and synchronize the clo
Powerful linux IDE-Geany configuration instructions, linuxgeany configuration instructions
I started using Ubuntu today (mainly to prevent myself from playing games on windows) at the beginning, I was not used to finding a suitable Compiler (when can DEV c ++ come out of Linux?). codelite code :: blocks won't be configured. I don't know much about the tutorials on the Internet, so I started to study Geany.
Linux ftp configuration instructions, ftp configuration instructions
1. Default Configuration:1> allow anonymous users and local users to log on.Anonymous_enable = YESLocal_enable = YES2> the logon name used by anonymous users is ftp or anonymous, and the password is blank. anonymous Users cannot leave the anonymous user's home directory/var/ftp, and can only download but cannot upload.3> the login name of
the memory and locate the production date as 01/01/92.
(2) run the e command to modify the date and run the D command to check whether the modification failed.
4. Fill in data to the unit in which the memory starts from b8100h.
Change the entered data and address, and find that a pattern is controlled by two memory units. The former controls the style and the latter controls the color.
Experiment summary and experience
?No result is returned when the CPU writes data to the memory address c0
: Move a file or directory to the target directoryFormat: cp[option] source file or directory destination directoryor cp[option] source file or directory destination fileOption:-R to move in a recursive fashion-p move to preserve the properties of the source file or directory (such as timestamp)RmFunction: Delete the specified file or directoryOption:-R Recursive Delete (for deleting directories)-F Force Delete-I interactive Delete-V Show processing processExample: Rm/tmp/daxiongmaoRm-rf/tmp (fo
C language-related pre-compilation instructions and compilation instructionsI. Content Overview
This article mainly introduces the pre-compiled commands related to Conditional compilation in C language, including # define, # undef, # ifdef, # ifndef, # if, # elif, # else, # endif, and defined.Ii. Conditional compilation
Conditional compilation is a method for static code compilation based on the actual definition of macros (certain conditions. You can
Linux instructions curl instructionsCommand: curlIn linux, curl is a File Transfer tool that uses URL rules to work under the command line. It can be said that it is a powerful http command line tool. It supports file upload and download. It is a comprehensive transmission tool. However, traditionally, URLs are called download tools.Syntax: # curl [option] [url]Common parameters:-A/-- user-agent -B/-- cookie -C/-- cookie-jar -C/-- continue-at -D/-- du
Detailed instructions on the use of the mini-program digital scroll plug-in
Es6 syntax is used to write a small program plug-in-number scrolling;
:
Wxml page layout code:
Index. js calls NumberAnimate. js
// Pages/main/index. jsimport NumberAnimate from ".. /.. /utils/NumberAnimate "; Page ({data :{}, onLoad: function (options) {// parameters brought about by Page initialization options for Page Jump}, onReady: function () {}, onShow: function () {/
$ _ SERVER and php_server in PHP. $ _ SERVER usage instructions in PHP. some SERVER information is often used in PHP programming. the detailed parameters of $ _ SERVER are sorted out for future use. $ _ PHP $ _ SERVER and php_server
Some SERVER information is often used in PHP programming. the detailed parameters of $ _ SERVER are sorted out for future use.
$ _ SERVER ['php _ SELF '] # file name of the script being executed, which is related to docum
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