sage erm

Label: style blog HTTP color OS AR for strong sp The first pig Program Environment: Hadoop-1.1.2 Pig-1, 0.11.1 Centos6.4 for Linux Jdk1.6 Run in pseudo-distributed mode Start: Pig or pig-x mapreduce After the startup, you will see this interface, indicating that the startup is successful. Let's run an example. The input data student.txt is as follows: 201000101: zhanglong: Man: 20: Computer 201000102: WangLi: Women: 19: Software 201000103: Liuhua: Women: 18: compuer 201000104: Lixiao: Man: 19:

The following is to share a Python create a list and add elements to the implementation of the list, has a good reference value, I hope to help you. Come and see it together. Today's learning content is related to the list in Python. I. Create a list 1. Create a normal list >>> Tabulation1 = [' The Holy Man ', ' canopy ', ' roll the curtain ']>>> tabulation1[' st ', ' canopy ', ' roller blinds '] >>> Tabulation2 = [72,36,18]>>> tabulation2[72, 36, 18] 2. Create a mixed list >>> Mix tabulat

For SQL queries with the highest score, lowest score, and average score, take the Student score as an example. * structure Student table Student (S #, Sname, Sage, Ssex) -- S # Student ID, sname Student name, Sage year of birth, Ssex Student gender-2. course curriculum Course (C #, Cname, T #) -- C # -- Course No., Cname Course name, T # instructor no. * queries the highest score of each subject, the highes

has a special meaning, which refers to the excessive sexual life. Liangdong Elder: "Sexual immorality can not be confused with the heart" ah. Xu Wenbing: Ah, the next word will be confused, what is the meaning of confusion?Liangdong Elder: Confused you see above is a or word, below is a heart, 40 perplexed well, that is, will not say also can this also can that.Xu Wenbing: Yes, right, in fact, confused his heart a word to explain, the common people's big saying is called cross-stitch eye. Confu

are you doing? 3 minutesThe first service is in charge of Oracle, and that service does not start with Oracle.The second Service Supervisor Oracle client operation, after you install play Oracle, there is a web link at the start-to program->oracleThis service does not open, your Web links cannot go in.The third service is the one that is responsible for the scheduled tasks inside Oracle. This basic useless, general operation does not need to tube him.7.Oracle database Forgot Password solution:

/******************************************** Example 1 inquiring about each student and his elective course *********************************************/ The code is as follows Copy Code SELECT student.*,sc.* from Sc,student WHERE SC. SNO = STUDENT. SNO; /******************************************** For example 1, complete with a natural connection *********************************************/ The code is as follows Copy Code

50 Common SQL statements Student (s#,sname,sage,ssex) Student table Course (c#,cname,t#) timetable SC (s#,c#,score) score sheet Teacher (t#,tname) Teacher's Table Problem: 1, Query the "001" Course than "002" course scores of all students of the school number; Select a.s# from (select S#,score from SC where c#= ' 001 ') A, (select S#,score From SC where c#= ' 002 ') b where A.score>b.score and a.s#=b.s#; 2, the average score is greater than 60 stude

Tags: and simple post Order Log mit mil sum nameFormat:Select From where GROUP BY Having Order BY SELECT * FROM StudentSELECT * FROM student where Sno = ' 1 'SELECT * FROM student S,course C,score SC where SC. ' Sno ' = S. ' Sno ' and SC. ' CNO ' = c. ' CNO 'SELECT DISTINCT * FROM score//Remove duplicate rows for query resultsSELECT * from student where Sage between 25//query student information between 20~30岁SELECT * FROM student where

("Jdbc:mysql://localhost:3306/mydb3", "root", "20166815"); MySQL Query statement Statement stmt = Con.createstatement (); ResultSet rs = stmt.executequery ("SELECT * from student"); Parse resultset while (Rs.next ()) { String sno = rs.getstring (1); String sname = rs.getstring (2); String ssex = rs.getstring (3); I

sort in descending order of grades Select * from(Select(SelectCName fromCoursewhereCid=M.CID),avg(Cmark) Cavg fromMark MGroup byCID)Order byCavgdesc Select * from(Select avg(Cmark) CAVR fromMarkGroup byCidOrder byCavgdesc 6. Sub-query Implementation  query ' 3-2 class ' "Zhang Li" students "English" scores SelectCmark Results fromMarkwhereSid=( SelectSid fromStudentwhereSname='Zhang San' andSclass='Class 2') andCid=(SelectCid fromCoursewhereCName='English') 7. Check the age of each class

, the field type Plus,Statement:CREATE TABLE Student (sname varchar (20),Sage Int,Gender varchar (2));2. View the table2.1 Viewing all tables in a databaseStatement: Show tables;　2.2 Returns the information of a table in an SQL statementStatement: Show create TABLE student;2.3 A form returns header informationStatement: DESC student;3. Modify the table3.1 Add a field to the table, that is, add an attributeStatement: ALTER TABLE student add column SID

Condition Between...and ... (includes upper and lower limits)Select * fromStudentSelect * fromStudentwheres#between 1 and 3Select * fromStudentwhereSagebetween '1989-01-01' and '1990-05-20'InchSelect * from Student Select * from where inch (' Wang Ju ', ' Qingshou ')Like ("%" stands for any one or more characters, "_" stands for any one character)Select * from Student Select * from where like ' % Cloud ' or like ' Zhao _ 'Case...when ... Select Case Year(

Tags: mybatis oracle Batch Increase1.student classPackage Com.test.hou.po;public class Student {private int sid;private String sname;private int sage;public int GetSID () {R Eturn SID;} public void Setsid (int sid) {this.sid = SID;} Public String Getsname () {return sname;} public void Setsname (String sname) {this.sname = sname;} public int getsage () {return sage;} public void setsage (int

Tags: mybatis oracle (SSI2) batch Update Student class Package Com.test.hou.po;public class Student {private int sid;private String sname;private int sage;public int GetSID () {R Eturn SID;} public void Setsid (int sid) {this.sid = SID;} Public String Getsname () {return sname;} public void Setsname (String sname) {this.sname = sname;} public int getsage () {return sage;} public void setsage (