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ID, year from article order by year desc, ID DESC) W order by w. year asc, w. ID ASC) W2 WHERE w1.ID = w2.ID order by w1.YEAR DESC, w1.ID DESC Time required for an average query of 100 times: 21 SSolution 4:Copy codeThe Code is as follows: SELECT * from article w1Where id in(SELECT top 30 ID FROM(SELECT top 45030 ID, year from article order by year desc, ID DESC) W order by w. year asc, w. ID ASC)Order by

SQL Server database paging query has been a short board of SQL Server, idle, come up with several methods, assuming that there are table article, Field ID, year ... (other omitted), Data 53,210 (customer real data, quantity is not large), paging query each page 30, query page 1500th (ie 第45001-45030条 data), field ID clustered index, Year no index, SQL Server version: 2008R2 The first scenario, the simplest, the common method: Copy code code as follows: Select Top * from ARTICLE WHERE ID. (sel

Label:SQL Server database paging query has been SQL Server's short board, Idle to do nothing, think of several methods, assuming that there is a table article, Field ID, year ... (other omitted), Data 53,210 (customer real data, amount of small), page 30 per page, query page 1500th (that is, 第45001-45030条 data), field ID clustered index, Year no index, SQL Server version: 2008R2The first scenario, the simplest and the most common method:The code is as follows:Select top article WHERE ID not in (

, year from article order by year desc, ID DESC) W order by w. year asc, w. ID ASC) W2 WHERE w1.ID = w2.ID order by w1.YEAR DESC, w1.ID DESC Time required for an average query of 100 times: 21 SSolution 4:Copy codeThe Code is as follows:SELECT * from article w1Where id in(SELECT top 30 ID FROM(SELECT top 45030 ID, year from article order by year desc, ID DESC) W order by w. year asc, w. ID ASC)Order by w1.Y

The first solution, the simplest and common method: Copy codeThe Code is as follows:Select top 30 * from article where id not in (select top 45000 id from article order by year desc, id desc) order by year desc, ID DESC Average query time: 45 s Solution 2: Copy codeThe Code is as follows:SELECT * FROM (select top 30 * FROM (select top 45030 * from article order by year desc, id desc) f order by f. year asc, f. id desc) s order by s. year desc, s. ID DESC Time required for an average of 100 queri

exchanged (Commute). Otherwise, the execution effect will be affected. [Example] Sc1 = r1 (A) w1 (A) r2 (A) w2 (A) r1 (B) w1 (B) r2 (B) w2 (B) w2 (B) exchange w2 (A) with r1 (B) w1 (B) to obtain: r1 (A) w1 (A) r2 (A) r1 (B) w1 (B) w2 (A) r2 (B)

The first solution, the simplest and common method: Copy codeThe Code is as follows: select top 30 * from article where id not in (select top 45000 id from article order by year desc, id desc) order by year desc, ID DESC Average query time: 45 s Solution 2: Copy codeThe Code is as follows: SELECT * FROM (select top 30 * FROM (select top 45030 * from article order by year desc, id desc) f order by f. year asc, f. id desc) s order by s. year desc, s. ID DESC Time required for an average of 100 q

then immediately scaled back. This is an example of a neural network. The temperature produced by the fire opponent is the input layer (input) of Figure 2, and the scaled-down or not scaled-down is the output layer of Figure 2 ). But scale-down occurs only when the temperature in the hand reaches a certain level, for example, 40 degrees. Figure 2 is used to represent the preceding situation: X1 = temperature produced by fire opponents W1 = the weight of the temperature produced by the fire

The first scenario, the simplest, the common method: Copy Code code as follows: Select Top * from ARTICLE WHERE ID. (select top 45000 ID to ARTICLE order by year DESC, id DESC) Esc,id DESC Average Enquiry 100 Time: 45s The second option: Copy Code code as follows: SELECT * FROM (select top 45030 * from ARTICLE, DESC, ID DESC) F ORDER by F.year ASC, F.id DESC) s ORDER by S.year Desc,s.id DESC Average Enquiry 100 Time: 138S The third option:

SQL Server database paging query has been SQL Server's short board, Idle to do nothing, think of several methods, assuming that there is a table article, Field ID, year ... (other omitted), Data 53,210 (customer real data, amount of small), page 30 per page, query page 1500th (that is, 第45001-45030条 data), field ID clustered index, Year no index, SQL Server version: 2008R2The first scenario, the simplest and the most common method :Copy CodeThe code is as follows:Select top article WHERE ID not

performance of the execution [example) there is now dispatch Sc1=r1 (a) W1 (a) Span class= "hljs-built_in" >r2 (a) W2 (a) r1 (b) W1 (b) r2 (b) W2 (b) Exchange of W2 (a) with r1 (b) W1 (b), Received: r1 (a) W1 (a ) r2 (a) r1 (b) W1 (b) W2 (A) r2 (b) W2 (b) re-r2 (A

is considered dead lockCons: Bad waiting time settingWait Graph methodThe concurrency control subsystem periodically generates a transaction wait graph and detects if a loop is present, indicating a deadlockSerializable schedulingConceptThe result of multiple transactions executing concurrently through a scheduling policy is the same as the result of executing those transactions serially in a sequential order. This scheduling strategy is called serializable scheduling.Serializable is the criter

): Classifierarray=[Classifier25, Classifier55, Classifier85] Errarray=[] Value= Float ('NaN') Errmin= Float ('INF') forClassifierinchClassifierarray:#calculate the result value of a classificationYY =Classifyarray (Xarray, classifier)#calculate the error rate for a classificationErrorvalue =errorsum (YY) errarray.append (errorvalue)ifErrorvalue Errmin:errmin=Errorvalue Value=classifierPrint(Errarray)Print(value.)__name__) returnvaluePrint(W1)" "Print ('--------------------------------')

not the same as W ', so r reads the value must be w write the value, O__o ".... This is illustrated in conjunction with a graphic. ] single Goroutine Case: (labeled R read,w is write, all operations on value)--w0----R1-W1----W2-----r2----R3----------> here Not only is a partial-order relationship, but a good-order relationship, all the r/w are comparable; double Goroutine case:--w0----R1-r2----W3-----W4----R5---------->--W1 -----

the six faces, you must first calculate the coordinates of each point based on the rotation angle. See the following figure. Based on the preceding figure, use the following formula to obtain the converted fixed point coordinates. Rect.prototype.getPoint = function(p){var u2,v2,w2,u=p[0],v=p[1],w=p[2]; u2 = u * Math.cos(this.angleX) - v * Math.sin(this.angleX); v2 = u * Math.sin(this.angleX) + v * Math.cos(this.angleX);

interfaces to correctly separate several classes of samples. For two classes of sample points w1 and w2, the set of sample points is represented :, we use a discriminant function to divide w1 and w2. We need to use these sample sets to determine the weight vectors of the discriminant function.A, The augmented sample vector can be used.YThat is, an appropriate augmented weight vector exists.ATo make: Where

When writing JavaScript code, it is sometimes necessary to use the width of the scrollbar, but the width of the scroll bar may be different under different browsers.This piece of code is found in the jquery UI source code:varScrollbarwidth=function () { if(Cachedscrollbarwidth!==undefined) { returnCachedscrollbarwidth; } varW1, W2, Div= $ ("), Innerdiv= Div.children () [0]; $("Body"). Append (div); W1=Innerdiv.offsetwidth; Div.c

faces are created. Before drawing the six faces, you must first calculate the coordinates of each point based on the rotation angle. See the following figure. Based on the preceding figure, use the following formula to obtain the converted fixed point coordinates. Rect.prototype.getPoint = function(p){ var u2,v2,w2,u=p[0],v=p[1],w=p[2]; u2 = u * Math.cos(this.angleX) - v * Math.sin(this.angleX); v2 = u * Math.sin(this.angleX) + v * Ma

sap is convenience ...... (What is your 1 minute BFS_sap ()? If not) [Cpp]# Include # Include # Include # Include # Include # Include # Define MAXN (500 + 10)# Define MAXM (124750 + 10)# Define MAXCi (10000 + 10)# Define INF (2139062143)# Define For (I, n) for (int I = 1; I # Define Forp (p, u) for (int p = pre [u]; p = next [p])Using namespace std;Int n, m, edge [2 * MAXM], weight [2 * MAXM], c [2 * MAXM], next [2 * MAXM], pre [MAXN], size = 1;Void addedge (int u, int v, int w, int

Experiment five network programming and security task a knowledge summary DC Operator: +: Eject W1 and W2 in turn, press the W2+W1 stack. Precision is the result value precision -: Eject W1 and W2 in turn, press the W2-W1 stack *: Eject W1 and W2 in turn