sc2

(10) not null -- Student name ) Create table Course ([Cid] int not null primary key, -- course numberCName VARCHAR (10) not null -- Course name) Create table SC ([Sid] int not null,[Cid] int not null,Grade int not null, -- scoreForeign key ([SID]) REFERENCES Student2 ([Sid]),Foreign key ([CID]) REFERENCES Course2 ([Cid])) The diagram is as follows: This Data graph shows the relationship between the foreign key of the primary key, which is also in line with our thinking. Then I changed a line

) for (int i=0;i#defineREP1 (i,n) for (int i=1;i#defineMax (a) (a) > (b)? (a):(B)#defineMin (a) (a) #definePT (a) printf ("%d\n", a)#defineLson (step#defineRson (lson+1)#defineESP 1e-6#defineOO 0x3fffffff#defineTEST coutusing namespaceStd;typedefLong Longll;intN;Const intmaxn=6000+Ten;intdp[maxn][2];intVIS[MAXN];intHEAD[MAXN];intFLAG[MAXN];intT;structside{intV,next;} E[MAXN];voidinit () {T=0; Zeros (VIS); Zeros (DP); Zeros (flag); Ones (head);}voidBuildintUintv) {E[T].V=v; E[t].next=Hea

-> other son node's maximum distance needs to access the first time DFS is the DP value, that is, the first time DFS when the maximum distance e[ps-1].dis=e[ps].dis=temp; ElseE[ps+1].dis=e[ps].dis=temp;}intMain () {//freopen ("In.txt", "R", stdin); while(~SC (n)) { intv,w; Init (); for(intI=2; i) {SC2 (v,w); Build (i,v,w);//Establish a non-forward edge, the size of the two horizon relationship is the former than the latter side of t

-255 of this paragraph.As for Asian countries, the use of symbols is more, the Chinese character is about 100,000. A byte can represent only 256 symbols, which is certainly not enough, and must be expressed using multiple bytes to express a symbol. For example, the common encoding method in Simplified Chinese is GB2312, which uses two bytes to represent a Chinese character, so it is theoretically possible to represent a maximum of 256x256=65536 symbols.The issue of Chinese coding needs to be dis

Reprint please indicate the source: Wang 亟亟 's way of DanielFirst of all here to wish you a Happy new year, work smoothly, fewer bugs!!!This is in the Spring Festival holiday continued to maintain the progress of writing articles, but still lazy for a few days (played 4 days SC2 haha ha)Today is about the Python article, after all, in the relatives of the family, do not bother to plug all kinds of mobile phone debugging what, and indeed a long time di

stage can run one or more tasks Notes: in cluster (cluster) mode, Cluster Manager runs in a JVM process, while the worker is running in another JVM process. In the local cluster, these JVM processes are in the same machine, and if they are real standalone or mesos and yarn clusters, the worker and master are distributed on different hosts. JOB Generation and Operation The simple process of job generation is as follows1. First the application creates an instance of Sparkcontext, such as an inst

and movie scores as values makes it easier to query multiple movies. film_names = series_film.valuesrt_scores = series_rt.valuesseries_custom = Series (rt_scores, index = film_names) # create a Series, you must specify the data and index parameters. # In this case, it is easy to query multiple movies. series_custom [['minions (2015) ', 'leviathan (2014)'] # For the Series created above, you can use the sort_index () function to sort the names of movies by letter. If you want to sort the names o

and hardware support are indeed not allowed. // The final solution mentioned in the Shawn Hargreaves PPT should be depth peeling to implement an alpha hybrid with irrelevant sequence, however, it is said that the efficiency is "amazing", and it is still worth it, but it is not ruled out that the GPU will be used out faster after N years. woo shadow ing works in a similar way, for more information, go to GOOGLE search. Some questions: although the post-processing engine is a development trend, t

An error occurs when using the scanner class to get input and to get int type and string type data consecutively.New Scanner (system.in); SYSTEM.OUT.PRINTLN ("input int type"); int a = sc.nextint (); SYSTEM.OUT.PRINTLN ("input string type"= sc.nextline (); System.out.println (a); System.out.println (s);System.out.println ("Run Complete");Run the result, enter 5 after the return, run finished directly, the request input string is skipped .Reason, enter 5 after the carriage return, by the system m

How to construct in inheritance1. The constructor of the subclass must be called during the construction of its base class.2. Subclasses can use Super (argument_list) to call the constructor of the base class in their own construction method.2.1. Use this (argument_list) to call the other construction methods of this class.2.2. If you call super, you must write the first line of the subclass construction method.3, if the constructor of the subclass is not shown in the constructor method of the c

{private int n;Subclass () {Super (300);System.out.println ("subclass");}public subclass (int n) {System.out.println ("Subclass (int N):" +n);THIS.N = n;}}public class testsupersub{public static void Main (String args[]) {Subclass SC = new subclass ();Subclass SC2 = new Subclass (200);}}The output is:Superclass (int n)SubclassSuperclass ()Subclass (int n): 200modifierdefault ( that is, by default, nothing is written): It is visible within the same pac

()"); } FirstClass fc4 = new FirstClass (4); } public class Initiationdemo ... { Secondclass SC1 = new Secondclass (); ... { System.out.println ("Hello Java world!"); } public static void Main (string[] args) ... { System.out.println ("Inside Main ()"); SecondClass.fc1.useMethod (100); Initiationdemo idobj =New Initiationdemo (); } Static Secondclass sc2 = new Secondclass (); } Run Result: FirstClass(1) FirstClass(2) FirstClass(3) SecondCl

session before executing the query insert INTO [dbo]. [Tbl_tempdbstats] SELECT session_id, database_id, User_objects_alloc_page_count, User_objec Ts_dealloc_page_count, Internal_objects_alloc_page_count, Internal_objects_dealloc_page_co Unt from sys.dm_db_session_space_usage WHERE session_id = @ @SPIDGO-check if the table exists if object_id (' tempdb.dbo. #tb L_sampledata ') is not a NULL DROP table tempdb.dbo. #tbl_SampleDataGO-generates data and inserts a temporary table select TOP 10

,???? Sdept Char (TEN))--,--or PRIMARY key (SNO))--//table-level constraint?--table-level constraintsCREATE TABLE SC1 (???? Sno Char (9),???? CNO Char (3),???? grade int,Primary KEY (SNO,CNO)--//table-level constraint)??--Referential integrity definitions--foreign key (column name) references table_name (column name)--Note that the column to be referenced should be the same length as the referenced column, with the same data typeSP_HELP course;sp_help student;--"Example 2" Referential integrity

1.SELECT selectionSELECT column name from table nameSELECT * FROM table name (select all columns)SELECT SNO from SCSELECT * from SC2.DISTINCT lists different values, removing duplicateSELECT DISTINCT column name from table nameSELECT DISTINCT SNO from SC3.ORDER by sorting the result setThe default is ascending, or ASC, and you can use DESC if you want to be descending.SELECT SNO from SC ORDER by CNO DESCSELECT Sno,cno from SC ORDER by CNO Desc,sno ASC

. The trick here is to define the function as private and not implement it. class Specialclass { ... Private : Specialclass (const specialclass); Specialclassoperator= (const specialclass); };By defining the specialclass as such and not implementing the two functions, if someone tries to copy the object of this class, the compiler will error: Specialclass SC1; Specialclass SC2 (SC1); // Error , compilation error = SC1;

); this.n = n; }}public class TestSuperSub { public static void main(String[] args) { SubClass sc = new SubClass(); //SuperClass(int n), SubClass() System.out.println(); SubClass sc2 = new SubClass(200); //SuperClass(), SubClass(int n) }} 5. Override and Overload Override-> overrides the,overload-> overload, which is conceptually different from C + +. Override When you need to call the overridden method of a pa

event_desc"]'); $ thisinfo = array (); $ add_infos = array (); foreach ($ event_date as $ keys = >$ values) {$ location = $ event_where-> item ($ keys) -> textContent; $ context = $ event_desc-> item ($ keys)-> textContent; $ thisinfo [] = array ('time' => $ values-> textContent, 'location' => $ location, 'context' => $ location. ", \ n ". $ context,);} if (count ($ thisinfo)> 0) {$ add_infos = array ('message' => "OK", 'Nu '=> $ postid, 'companytype' => "ecms", 'ischeck' => "1", 'com' => "ecms

Constructor in java inheritanceConstructor in inheritance 1. The constructor of the base class must be called during the constructor of the subclass. 2. Subclass can use super (argument_list) in its own constructor to call the constructor of the base class. 2.1 use this (argument_list) to call another constructor of this class. 2.2 If super is called, it must be written in the first line of the subclass constructor. 3. If the constructor of the base class is not displayed in the constructor of t

C ++ programming and development operator overload parsing, programming and development Operator C ++ programming and development operator overload parsing. ????? ? Now we have a class called shopping cart (SC ). If you don't have any functions, you just need to make it simple: the total cost of an output. . Then I have an iPad Air 2 in my car. # Include Using namespace std; class SC {int price; public: SC (int p = 0) {price = p ;}~ SC () {} void show () {cout ????? ? Now I want to add