dgl 4500

correlation, the correlation is not causal, so the correlation coefficients of the a->b or B->a two rules are the same, in addition lift (A,B) =p (a B)/(P (a) *p (B)) =p (a) *p (b| A)/(P (a) *p (B)) =p (b| A)/P (b) =confidence (a->b)/support (b) =confidence (B->a)/support (a). Chi-Square coefficient Chi-Square distribution is an important distribution in mathematical statistics, and we can determine whether two variables are correlated by using chi-square coefficients. Definition of chi-squar

@ rocrocket programming] $ sort-n-k 2-T: facebook.txtApple: 10: 2.5Orange: 20: 3.4Banana: 30: 5.5Pear: 90:2.3 We use the colon as the delimiter and sort the values in ascending order for the second column. The result is satisfactory. 7. Other common sort options -F converts lowercase letters to uppercase letters for comparison, that is, the case is ignored. -C checks whether the file is sorted out. If the file is in disordered order, information about the first unordered row is output, and 1 is

supports advanced features such as bandwidth control, Port Mirroring, Port VLAN, IEEE 802.1X authentication, UPnP, DDNS, VPN Pass-through, firewall, and system security logs. The configuration interface of this vro is a friendly Chinese interface, which is easy to configure and can be upgraded online. Product reviews: TP-LINK is a well-known local brand, product cost-effective advantage is more prominent, this dual WAN port router can be connected to different ISP, support load balancing strate

values in the dataName or index.name can rename the dataThe Dataframe data frame, also a data structure, is similar to the one in Rdata={' year ': [2000,2001,2002,2003],' Income ': [3000,3500,4500,6000]}DATA=PD. DataFrame (data)Print (data)The result is:Income year0 3000 20001 3500 20012 4500 20023 6000 2003DATA1=PD. DataFrame (data,columns=[' year ', ' income ', ' outcome '),Index=[' A ', ' B ', ' C ', ' d '])Print (DATA1)The result is:Year Income o

determine the null value (); select * from employee where isnull(sal); select * from employee where !isnull(sal); 5: between min and max ps in the interval (between): Here is a closed interval select * from employee where sal between 4500 and 5000; 6: Not in the interval select * from employee where sal not between 4500 and 5000;-- Null is not included 7: and or Select * from employee where sal not betwe

troubleshooting needs to collect what information Server information: 1. Machine model 2, Machine serial number (s/n: such as: NC00075534) 3, Bios version 4, whether to increase other equipment, such as network card, SCSI card, memory, CPU 5, how to configure the hard disk, whether to do array, array level 6, install what operating system and version (Winnt 4, Netware, Sco, others) Fault information: 1, on the post, the screen displays the exception information 2, the status of the se

Transferred from: http://time-track.cn/postgresql-window-function.htmlPostgreSQL provides the properties of the window function. The window function is also the data that computes some rowset (a collection of multiple rows, which we call window frame), somewhat similar to the aggregation function (aggregate functions). Unlike regular aggregation functions, however, window functions do not merge rows that participate in the calculation into one line of output, but rather retain their original app

', ' Female ', ' Beijing ', ' 1600 ');INSERT into ' Stu ' VALUES (' 8 ', ' tat ', ' 23 ', ' Male ', ' Beijing ', ' 3500 ');INSERT into ' Stu ' VALUES (' 9 ', ' Zhang Ling ', ' 23 ', ' Female ', ' Guangzhou ', ' 2500 ');INSERT into ' Stu ' VALUES (' 10 ', ' Ah calendar ', ' 18 ', ' Male ', ' Shanxi ', ' 3500 ');INSERT into ' Stu ' VALUES (' 11 ', ' Wang Gang ', ' 23 ', ' Male ', ' Hubei ', ' 4500 ');INSERT into ' Stu ' VALUES (' 12 ', ' Chen Yong ', '

determine the null value ();Select * from employee where isnull (sal );Select * from employee where! Isnull (sal );5: between min and max ps in the interval (between): Here is a closed intervalSelect * from employee where sal between 4500 and 5000;6: Not in the intervalSelect * from employee where sal not between 4500 and 5000; -- null is not included7: and orSelect * from employee where sal not between

1. Enter your own salary to calculate the personal income tax: according to the current tax rate (find your own tax rate) public static void Main (string[] args) {System.out.println ("Please enter your salary:");Scanner sc=new Scanner (system.in);Double money=sc.nextdouble ();Double total=0.0;total=money-3500;Double revenue=0.0;if (totalSystem.out.println ("Congratulations, no watering");}else if (totalrevenue=total*0.03;}else if (total>1500totalrevenue=1500*0.03+ (total-1500) *0.1;}else if (tot

');INSERT into ' Stu ' VALUES (' 8 ', ' tat ', ' 23 ', ' Male ', ' Beijing ', ' 3500 ');INSERT into ' Stu ' VALUES (' 9 ', ' Zhang Ling ', ' 23 ', ' Female ', ' Guangzhou ', ' 2500 ');INSERT into ' Stu ' VALUES (' 10 ', ' Ah calendar ', ' 18 ', ' Male ', ' Shanxi ', ' 3500 ');INSERT into ' Stu ' VALUES (' 11 ', ' Wang Gang ', ' 23 ', ' Male ', ' Hubei ', ' 4500 ');INSERT into ' Stu ' VALUES (' 12 ', ' Chen Yong ', ' 24 ', ' Male ', ' Beijing ', ' 150

tcpdump is as follows: Root@lsyp1002:~ #/usr/sbin/tcpdump ' Port 15001 and TCP '-x-s 0 tcpdump:verbose output suppressed, use-v or-vv F or full protocol decode listening on eth0, Link-type EN10MB (Ethernet), capture size 65535 bytes 13:37:07.448992 IP lsyp1002.xxx.xxxx.com.58939 > 10.111.112.7.15001:s 3188757698:3188757698 (0) win 5840 0x0000: 4510 003c df87 4000 4006 e10b cbd1 E.. . @.@....... 0x0010: 3cbf 7307 e63b 3a99 be10 94c2 0000 0000 0x0020: a002 16d0 c44c 0000 0204 05b4 0402

about the parameters. Simply put them into the variables... Khan Specific execution method:String pro = "{call master .. xp_cmdshell (?)} ";Callablestatement cstmt = conn. preparecall (Pro );String table = "DGL. DBO. Product ";String Path = "C: // test1.xls ";Cstmt. setstring (1, "BCP" + Table + "out" + path + "-C-Q-S/" (local) /"-U/" sa/"-P /"/"");Cstmt.exe cute (); If the backslash and double quotation marks in the statement are escaped using the b

It's interesting to study ASP for three days. Today, my colleague used ASP to export data from SQL to excel, So I combined the information I found before, at the same time, I also found some information about executing the stored procedure in the ASP database to help him get the following results. Set con = server. Createobject ("ADODB. Connection ")Con. Open "provider = sqloledb; user id = sa; Password =; Data Source = (local )"Con.exe cute "Exec master .. xp_cmdshell 'bcp "" select * From

Stress test Toolset Tools related URLs LoadRunner Http://www.mercuryinteractive.com/products/loadrunner/SilkPerformer http://www.segue.com /products/load-stress-performance-testing/index.asp Qaload http://www.compuware.com/products/qacenter/qaload.htm Webload Opensta Open Source JMeter Open source automated test toolset tools related URLs WinRunner http://www.mercuryinteractive.com/products/winrunner/SilkTest Http://www.segue.com/products/functional-regressional-testing/silktest.asp Qarun http:/

fields ALTER TABLE Add column field name Type--Personal think DB2 is not very convenient for the structure of the table 2.6 change field from Increment fields ALTER TABLE name ALTER COLUMN ID set GENERATED always as IDENTITY (START with 1, INCREMENT by 1, NO CACHE) 2.7 Self-connecting outer connection 3. Function 3.1 Casing function control--actually have the size function pit can only encounter in the actual operation the use of the 3.2 if-than-else 3.3 correlation model specification Basic

source code of the Delphi class library, there is always something we can learn from, based on the actual situation and specific needs of the company, you can choose to develop products in order to make high-quality products. --------Software Development-------- Data structure is the basis of software development. Before developing a project, you must prepare container classes such as TStack, THashtable, TQueue, TCollection, TMap, TBag, TSet, and TAssociation, then, in future development, selec

, familiar with the source code of the Delphi class library, there is always something we can learn from, based on the actual situation and specific needs of the company, you can choose to develop products in order to make high-quality products. --------Software Development-------- Data structure is the basis of software development. Before developing a project, you must prepare container classes such as tstack, thashtable, tqueue, tcollection, TMAP, tbag, tset, and tassociation, then, in fut

2.5 add the table field alter table add column field name type -- I personally think that the structure operation on DB2 tables is not very good convenience 2.6 change the field to the auto-increment field alter table name alter column ID set generated always as identity (start with 1, increment by 1, no cache) 2.7 self-connection external connection 3. function 3.1 case-sensitive function control-actually there is a size function pitfall that can only be encountered in actual operations 3.2 IF

SAL_TOTAL NUMBER 15:49:16 SCOTT@ test1 >select * from emp3; EMPNO SAL COMM SAL_PACK SAL_TOTAL---------- ---------- ---------- ---------- ---------- 10 1500 500 2000 18500 20 3000 500 3500 36500 30 4000 500 4500 48500 40 6000 500 6500 72500