essay on ransomware

; case "box1": target.style.backgroundColor = "yellow"; alert("this is box1") break; case "box2": target.style.backgroundColor = "purple"; break; //对box2本身也可以直接用default // default: // target.style.backgroundColor = "purple"; } document.body.onclick = null; }; Whenever an event handler is assigned to an element, a connection is established between the running browser c

number game:#!usr/bin/env python#-*-Coding:utf-8 _*-"""@author: Administrator@file: lucky_number.py@time: 2017/11/18"""#while True:Lucky_number= 18Input_num=-1 forIinchRange(5):Input_num= int(input("Input The Guess num:"))ifInput_num>Lucky_number:Print("The real number is smaller")elifInput_numLucky_number:Print("The real number is bigger")Else:Print("Bingo!") Break else:Print("Try too many times")Vii. Common data typesData type:Digital:int (integral type)Float (float type)Long (integer)Boolean

Range ()is a general function used to create a sequence of count-numbers.Python3, has its own type, range type.According to my understanding, the actual is a (32-bit computer/python ( -2**31,+2**31)), (64-bit computer/python ( -2**63,+2**63)), a built-in, immutable tuple.R=range (1,99) print (Type (r)) #r是range型print (tuple (R)) print (R) #从1-98 list, stating that range understands the Narimoto group--------How to use the-----------------------------Range (Start position: End Position: Step)The

One: Inheritance relationship of Exception classis a subclass of Throwable:1.Exception (Exception): An exception that the program itself can handle.2.Error (Error): An error that the program cannot handle. These errors indicate that the failure occurred on the virtual machine itself, or when the virtual machine attempted to execute the application, and generally did not require program processing . 3. Check for exceptions (exceptions that the compiler requires to be disposed of ): In addition to

embodiment of object-oriented thinking. Disadvantages are: Programming is slightly more complex, and you must use the Thread.CurrentThread () method if you want to access the current thread. The advantage of creating multiple threads with the inherited thread class is: Writing is simple and if you need access to the current thread, you do not need to use the Thread.CurrentThread () method to get the current thread directly using this. Disadvantage

　　Essay: under the same network, each seoer has its own different working life; in different cities, each seoer has a common goal, in this desire to fly across the "desert", every seoer is a grain of sand, we are very small, but we do not willing to bury, We have their own love, there are people who love themselves, each seoer shoulder their own responsibility, struggle in every city. Life is like chess, seoer like a pawn, in the face of the unknown

Gzh_pachetinfo where RfidnoIn (select barcode from Gzh_instock_detail where billidIn (select billID from Gzh_instock where OutunitidIn (select OrganizationId from cdms_organization start withOrganizationid= ' 3862fa81-ac03-44de-8e82-d39dacce9c9d 'Connect by Prior OrganizationId = ParentID) and unit= ' 4 ');SELECT * from Gzh_boxinfo; After I found the last data I wanted, I processed the data in my logic layer to get the results I wanted. Find their own SQL write very scattered, are a piece of n

--The name of the linked server to be created--Here is the name of the data source' 218.204.111.111,3342 ',' SQL Server 'GO--Create mappings between remote logins on a linked serverEXEC sp_addlinkedsrvlogin' 218.204.111.111,3342 ',' False ',Null--Login user name of remote server' Zhangzhe ',--Login password for remote server' fish2231 'Go--Querying dataSELECT * FROM [218.204.253.131,3342].pubs.dbo.jobsGoVersion 4.Oracle--Establish a connection serverEXEC sp_addlinkedserver--The name of the linke

M from Iac_fct_m201408_tmp Group by S_userid) LSelect L.s_userid,convert (Numeric (8,6), (3-avg (L.M))/395) as M1 from(Select S_userid,datediff (Dd,max (substring (s_maxdate,1,8)), ' 20140831 ') as R,sum (S_count)As F,sum (S_fee) as M from Iac_fct_m201408_tmp Group by S_userid) L GROUP by L.s_userid Select S.mdn, s.cdr_city_id, s.area_id, s.mdn_prov_id, T.s_cycle_date Is_find from areaky00001 s left join (select min (k.s_cycle_date) s_cycle_date, K.MDN, k.cdr_city_id from areaky00001 k whe

of records can have a layer number because the nodes are in different hierarchical locations. The layer number is determined by the distance between the node and the root node. The starting root node is always 1, the child node of the root node is 2, and so on, regardless of which node it starts from.5. Cropping of nodes and branchesWhen querying a tree structure, you can remove some rows from the table, or you can cut out a branch in the tree, and use the WHERE clause to qualify a single node

Tags: data type ble unsigned set oat floating point time text sqlData type classification MySQL data types are divided into five categories, integer type, floating-point type, String type, date type, and other data types. Integer type: bit, bool, tiny int, small int, Mediun int, int, big int Floating-point type: float, double, decimal String type: char, varchar, tiny text, text, medium text, long text, tiny blob, blob, media blob, long blob Date types: Date, datetime, timestamp,

problem: Innodb_trx, Innodb_locks, Innodb_lock_waits. Comparison of commonly used columns: Trx_id:innodb The only thing ID inside the storage engineTrx_status: Status of the current transactionTrx_status: Start time of transactionTRX_REQUESTED_LOCK_ID: The lock ID of the waiting transactionTrx_wait_started: The start time of the transaction waitTrx_weight: The weight of the transaction, which reflects the number of rows modified and locked by a transaction, the smaller the weight value is rolle

1. SUM () in SQL replaces count withSELECT COUNT (Ondutytime) as the entry from dbo this week. Employeemsg WHERE DATEDIFF (Week,ondutytime,getdate ()) =0SELECT ISNULL (SUM (1), 0) as the entry from dbo this week. Employeemsg WHERE DATEDIFF (Week,ondutytime,getdate ()) =0SELECT ISNULL (SUM (Case Time DATEDIFF (Week,ondutytime,getdate ()) =0 then 1 END), 0) as this week the entry from dbo. Employeemsg2. Database compatibility settings: Select the corresponding database right-click Properties--opti

; archive logCheck Backup:rman> Delete backup; Delete a backuprman> Delete copy;rman> list backup; List copy;Rman> report need backup; Based on policy checksrman> backup tablespace users;Rman> report need backup;Rman> CONFIGURE RETENTION POLICY to redundancy 2;Rman> report need backup;Rman> CONFIGURE RETENTION POLICY Clear;Rman> report obsolete; redundant >1To delete a backup:rman> Delete Backupset of tablespace users;rman> Delete backupset 1234;rman> backup tablespace users;rman> backup tablesp

viewFormat:Update View name set field name = field value where[condition]//Same as normal table updateAttention:The view modifies the data in the original table, so the base table is not generally modified through the viewDelete a viewDrop View NameAlgorithm of the ViewOverview:Refers to when a view executes, according to what wayExecution mode: Merge Merging algorithmThe execution of the merge, each time it executes, merges the SQL statements of the view with the SQL statements of the

2 select * from B where exists (select cc from A　　Span style= "COLOR: #0000ff" >where cc= b.cc) -- > is inefficient and uses the index of the CC column on table A. 2, not inand not exists Not in logic is not exactly the same as not exists, if you misuse not in, be careful of your program has a fatal bug, see the following example: 1 Create Table#t1 (C1int, C2int); 2 Create Table#t2 (C1int, C2int); 3 Insert into#t1Values(1,2); 4 Insert into#t1Values(1,3); 5 Insert into#t2Values(1,

elements of the priority queue are traversed in any particular order. If you need an orderly traversal, consider using Arrays.sort (Pq.toarray ()) . 2.5. Note that this implementation is out of sync. If any thread modifies the queue, multithreading should not access the Priorityqueue instance at the same time. Instead , use the thread-safe Priorityblockingqueue class . Implementation Considerations: This implementation provides an O (log (n)) time queue and the queue method (offer, poll, remo

: Sql> Select Constraint_name, Constraint_type from user_constraints where table_name= ' EMPLOYEES '; Sql> Select Index_name, Index_type uniqueness; From user_indexes where table_name= ' EMPLOYEES '; Sql> set Autot on Sql> Select last_name from Employees where employee_id=100; Walk index Sql> select email from employees; Walk index Sql> Select last_name from Employees where salary=2100; Full table Scan Sql> CREATE index Emp_salary_ix on employees (salary); Sql> Select last_name from Employees wh

Recently encountered a MySQL subquery at the time of development to delete the original table data problem. On the internet also saw a lot of methods, basic is also the egg (not write too messy is too slow).The company DBA gave a very good solution, refreshing.DELETE fb.* from Froadbill.bill FB left JOIN froadbill.refundinfo br in br.billseqno = Fb.seq_no WHERE br.billseqno is NUL L and Fb.create_time >='20150102000000'and fb.create_time ' 20150302000000' ;Froadbill.bill is a bill sheet (about

Tags: release ram win10 bin rsh Operation window Resources MoDWhen you create a Hyper-V virtual machine by using Docker-machine in Win10, an error is returned "Error with pre-create check: "Hyper-V PowerShell Module is not available"。The workaround is simple because the version of the Docker-machine program is replaced with the v0.13.0 version, and the details are as follows:1. Download the 0.13.0 version of the Docker-machine command. Click to download: 32-bit system or 64-bit system2. After th