Tags: c a data using the name classJust learned the basics of Oracle, so I want to find some SQL problems to practice practiced hand, so I chose this 50sql statement, because the found version is not Oracle, so try to use Oracle to achieve.This blog post is mainly to record the 50 questions in the understanding of the time, the answer is similar to the Internet. Now send the two-day just done.4 Tables of dataStudent tablesql> Select *from Student;SID SNAME SAGE SSEX---------- -------------------
Student (sid,sname,sage,ssex) Student tableCourse (Cid,cname,tid) timetableSC (sid,cid,score) score tableTeacher (tid,tname) Teacher tablePractice content:1. Check the number of all students who have a "1" course with a higher grade than "a 2" course;SELECT A.sidFrom SC as a, SC as bWhere a.cid in (SELECT CidFrom CourseWhere cname= "some 1")and B.cid in (SELECT CidFrom CourseWhere cname= "some 2")and A.scor
table} else {$ sign = $ dao-> add (array ('userid' => $ this-> memberID, 'si _ count' => 1, 'Si _ time' => $ current,'m _ second '=> $ m_time); // sign-In table $ count = 1;} if ($ sign) {// sign in on the first day + 1 sign in on the second day + 2 sign in on the third day + 3 sign in on the fourth day + 4 sign in on the fifth day + 5 consecutive 5 days + 5 switches ($ count) per day) {case 1: $ SC _score = 1; break; case 2: $
character encoding format used by the response.22 void setcontentlength (INT length) sets the length of the response body.23 void setcontenttype (string type) sets the response type.24 void setdateheader (string name, long value) sets the value of the data-Type HTTP header with the specified name.25 void setheader (string name, string value) sets the HTTP header value of the specified name.26 void setintheader (string name, int value) sets the HTTP header value of the int type of the specified
);INSERT into stu_couse values (stu_couse_seq.nextval,1,3);INSERT into stu_couse values (stu_couse_seq.nextval,1,5);INSERT into stu_couse values (stu_couse_seq.nextval,1,5);
INSERT into stu_couse values (stu_couse_seq.nextval,2,1);CommitSELECT * from Stu_couse;SELECT * from course;
--select s.stu_name,sc.couse_id, c.couser_name from students S,course C,stu_couse SC where stu_id=1
--select couse_id from Stu_couse where stu_id=1
Select Cl.classname,s.st
the execution sequence of the B process, such as inserting a piece of code into a normal execution sequence, and letting the B process load a dynamic library.Below is a study of how ADBI uses Ptrace to achieve its goal:First, attach to the target process if (0 > Ptrace (ptrace_attach, PID, 0, 0)) { printf ("Cannot ATTACH to%d, error!\n", PID); Exit (1); } Waitpid (PID, NULL, 0); Second, get the target process current registerPtrace (Ptrace_getregs, PID, 0, regs);Next, the
lambda:8 students.orderbydescending (s = s.class)
※ Line number Query
Select COUNT (*) from student where class = ' 95031 ' 2 Linq: 3 (from s in Students 4 where S.class = = "95031" 5 Select S 6 ). Count () 7 Lambda: 8 students.where (s = = S.class = = "95031") 9 . Select (s = = s) Ten . Count ()
※ Average Query
Check the average score for course ' 3-105 '. 2 Select AVG (degree) from score where cno = ' 3-105 ' 3 Linq:
Title Link: Wandering RobotsSolution: First of all, for each lattice it can be from the number of places to have a value (from themselves to themselves), and then the answer is to count the number of legal lattice and the ratio of the number of all the latticeFor example, the value on the 3 0 lattice of the sample is3 4 34 5 43 4 3The answer is 22/33 =2/3; the next is how to count the answer, because the figure 1e4*1e4 but the point only 1e3 must be discretized to get a new graph, discretization
, carpr, sizeof carpr) (source code 1687 line)
In carpr. Then set the hardware address of the device. Let's take a look at line 1718 of the source code:
SC-> SC _vhid = carpr. carpr_vhid;
SC-> SC _ac.ac_enaddr [0] = 0;
SC-> SC
Recently downloaded a set of Oracle database exercises (no answer), I practice the answer on Oracle, if the wrong place, please do not take it amiss. Save to the blog to facilitate their own later lookup.
Related tables:
/* Student table
/CREATE TABLE Student
(
Sno varchar2 () primary key not NULL,
sname varchar2 (),
Sage Number (2),
ssex varchar2 (5)
)/
* Teacher Table/
CREATE TABLE Teacher
(
TNO varchar2 () primary key,
tname varchar2 ()
)
/* Schedule
/CREATE TABLE
Because SupeSite needs to call Discuz! And UCHome data, so if they are not installed in the same database, SupeSite database users must pair Discuz! And UCHome databases have read
Because SupeSite needs to call Discuz! And UCHome data, so if they are not installed in the same database, SupeSite database users must pair Discuz! And UCHome databases have read
Because SupeSite needs to call Discuz! And UCHome data, so if they are not installed in the same database, SupeSite database users must
Mysql sets the cross-permission method for the database bitsCN.com, which requires you to modify the user permissions in MySQL and grant the required permissions.
This article demonstrates this situation and provides detailed solutions.
The configuration in this example is as follows:
Discuz!Database name: discuz_7_ SC _utf8Database username: discuz_mysqlPermission: all permissions for discuz_7_ SC _utf8 op
5404 1 SNDPartport 28496 2 ppdev, parport_pcI2c_piix4 8480 0Snd_page_alloc 7644 1 snd_pcmI2c_core 18056 1 i2c_piix4Mii 4028 1 pcnet32Pcspkr 2156 0BusLogic 61836 3
I don't know what it means. Just follow the article.
Then,
[Root @ localhost sounds] # ls/lib/modules/2.6.29.4-167. fc11.i686. PAE/kernel/Arch crypto drivers fs lib net sound
Below, it is more important, because I just did the following, and then suddenly found that the sound card can sound.
[Root @ localhost sounds] # modinfo snd-
number of students in the CS series; select count (*) Number of students in the computer series from studentwhere sdept = 'cs '; -- 8. count the number of students in each department. The results are sorted in ascending order. Select sdept, count (*) cntfrom SC, studentwhere student. sno = SC. sno group by sdeptorder by CNT; -- 9. the average age of the students in each department is calculated by the Depa
dealing with similar factories explicitly, in fact, this function also calls the cogetclassobject () function internally to obtain the class factory of COM objects, but it encapsulates the process of creating objects through the class factory, you only need to specify the CLSID of the object class and the interface pointer and Interface ID to be output. Obviously, it is very convenient to directly create a COM object, after obtaining the COM Object Pointer, you can use this pointer to access me
--########## 01, comprehensive practice the table structure used by ##########--is derived from the database design of "Teacher instruction, student elective course and course achievement" created earlier--Studentinfo, Teacherinfo, Courseinfo, scoreinfo--1. The number of teachers who queried the surname Zhang Select count (Teacherid) as Zhang's number of teachers from the Teacherinfowhere teachername like ' Zhang% ';--2. Query the number of students enrolled in each course--writing 1, using the
Introduction T = bus topology (lev, prnt, Port, Cnt, etc.), refers to the connection mode between the USB device and the host B = bandwidth (only for the USB master controller) D = device description information P = product identification information S = string descriptor C = configuration description (* indicates activity configuration) I = interface description information E = terminal description information general format: d = decimal number x =
HIDPhysical device-0x05Printer-0x07Supplier-0xFF5.2 introduction to usb file systemT = the bus topology (maid, Prnt, Port, Cnt, etc.) refers to the connection mode between the USB device and the host.B = bandwidth (for USB master controller only)D = device descriptionP = product ID informationS = string DescriptorC = configuration description (* indicates activity configuration)I = Interface DescriptionE = terminal POint DescriptionGeneral format:D =
First of all, I would like to thank longchang for automatically signing in to the Kingsoft disk at http://www.oschina.net/code/snippet_93572_000021.pdfProgramCodeOn this basis, I made a program using wxpython. The specific code is as follows:
# -*-Coding: cp936 -*- # '@ Xiaowuyi http://www.cnblogs.com' # 'Kingsoft fast disk sign-In Process' Import Urllib Import Urllib2 Import Cookielib Import JSON Import Re Import WX Def Create (parent ): Return Frame1 (parent) [wxid_frame1
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.