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In recent years, more and more Silicon Valley technology companies have begun to use the puzzle interview method. These companies are not interested in the correct answer, but in the way and ability of candidates to solve the problem. In China, whether it's a new graduate or a jobProgramWhen applying for work in programming and software development, recruiters will always arrange a written test to examine their programming and logic analysis capabilit
SQL server interview questions, SQL SERVER interview questions
I went to the interview today and got caught by a small database problem. I am ashamed and brave.
as follows: SELECT * from WHERE >= (SELECT from articles WHERE = 123 ORDER by 10000 1 Ten 3. How does the MySQL index be implemented? What's the problem? Simply understood, the index is to speed up the query . The index is stored independently, so when the amount of data is large, updating the table to update the index at the same time, causing the update speed down . Here I have referred to two articles, the address is as follows: http://fangjian0423.github.io/2017/07/05/mysql-index-summar
One SQL interview question (row and column Interchange), SQL questions
There is a high probability that an SQL question will appear during the interview. Recently, some students will still encounter such a question during the
Junior SQL Server developer interview questions
Written by: Jeremy kadlec
From:
Http://www.mssqltips.com/tip.asp? Tip = 1644
ProblemWe are in the process of trying to hireJunior SQL Server developer to work on a few of our projects. WhatExpectations shocould we have on their skill set? What are some fairQuestions to
where E1.mgr =E2.empno (+);Find two jobs with the highest average wage, grouped by positionSELECT * FROM (select AVG (SAL) from emp order BY job desc) where rownumselect= "D.dname=" "from=" "emp=" "dept=" "d=" "where=" "and=" "E.sal=" "> (selectMax (SAL) fromEMP where deptno=20) and E.deptno=d.deptnoJob categories with average wage greater than 20002018/5/31 Oracle Database interview Written questions summ
Jessonlv-lu guodong Original article, reproduced please indicate the source: http://blog.csdn.net/jessonlv
The interview questions I encountered during the interview mainly focused on the joint query of SQL. google made a mistake, but I fixed the mistake and shared it with you:
Problem description:Create three tables t
Analysis of Java interview questions and prevention of SQL injection, semi QL
This article focuses on a common question in the Java interview questions, how to judge and prevent SQL Injection problems. The details are as follows.
mathematical score of 2-3 (Requirements display field: Student number, name, subject, score)Answer: Select t3.* from (select top 2 t2.* from (select Top 3 name,subject,score,stuid from Stuscore where subject= ' math ' order by score Desc) T2 ORDER by T2.score) T3 ORDER BY T3.score Desc11. Find out the ranking of John Doe's mathematical achievementsAnswer: Declare @tmp table (PM int,name varchar (), score int,stuid int) insert INTO @tmp select Null,name,score,stuid from Stuscore where subject= '
Label:A few days ago to participate in an interview, interview company to do a set of questions, SQL problem is not difficult, but I was the first to write the wrong, come back, write the next. Simply record it, 1. Title: 2. Test data SELECT * from student;
INSERT into student (Name,subject,score) VALUES (' Zhang
When interviewing the SQL Server database developer, I used a set of standard benchmark technical questions. The following problems are the problems that I think can really help eliminate unqualified candidates. They are arranged in the order of ease to difficulty. When you ask questions about the primary key and foreign key, the following
Tags: sql face question SQL exerciseStructure of the tableStudent (s#,sname,sage,ssex) Student tableCourse (c#,cname,t#) timetableSC (s#,c#,score) score tableTeacher (t#,tname) Teacher table 1. Creating the corresponding table CREATE table student (' s# ' int, sname varchar (+), Sage int, s Sex varchar) The following omit 2. Inserting data insert into student Select 1, ' Zhang San ', 18, ' Male ' union A
formatting results returned by the function are not updatable.3. Functions that return scalar valuesA user-defined function can return a scalar value. Difference between the two 1. In general, the function of the stored procedure implementation is a bit more complex, and the function implementation of the function is relatively strong. 2. Parameters can be returned for stored procedures, and functions can only return values or table objects. 3. The stored procedure is typically performed as a
security.Even so far, some people don't even know the basic semantics of SQL syntax.String sql = "SELECT * from Tb_name where name= '" +varname+ "' and passwd= '" +varpasswd+ "'";If we pass [' or ' 1 ' = ' 1] in as varpasswd. User name feel free to see what will become?SELECT * from tb_name = ' random ' and passwd = ' or ' 1 ' = ' 1 ';Because ' 1 ' = ' 1 ' is sure to be true, so you can pass any validation
Q A location: http://space.cnblogs.com/q/20546/q A: I have asked more questions about the relationship: 5 [resolved issues] Browse: 52 times 00
Student table T1
Stu_id
Stu_name
1
Zhang San
2
Li Si
3
Wang Wu
Course list T2
Co_id
Co_name
1
Java
2
C #
3
C
4
C ++
5
Javascript
Link Table T3
Stu_id
Co_id
A few days to a company in Pudong to interview, feel that there is a database query questions did not answer well, self-summary, the next attention.Title: The size of tables in the database, and arranged out. Write the corresponding SQL statement.The code is as follows:CREATE PROCEDURE [dbo].[Gettablespace]@dbNamesysname= "',--database name, default current datab
This post is intended to include some SQL interview questions I have encountered or seen online, which is equivalent to a personal record.
It will be updated continuously in the future.
2.3.9
There is such a table
Fans (Team, nationality, fancount)
'Barri', 'Germany ', 12000'Barri', 'Spain ', 18000'Barri', 'China', 13000'Barri', 'usa', 15000'Ba
SQL database Interview Questions and answers
(22:52:54)
ReprintedBytes
Summary of course number of three c courses by Ye Ping
Category: Program World
Student (S #, Sname, Sage, Ssex) Student table S #: Student ID; Sname: Student name; Sage: Student age; Ssex: Student genderCourse (C #, Cname, T #) curriculum C #, Course No.; Cname: Course name; T #: Instructor No
Interview book --- multithreading and interview book Multithreading50 Java thread interview questions
The following are top questions related to Java threads. You can use them to prepar
reviews.③ (Recruiting for an insurance project) "I don't have much experience with spring MVC, so there are some unanswered questions, mostly developed using the JSP+SERVLET+JDBC model (this is truth, but if he's prepared before the interview, it shouldn't be said), But I have done insurance-related projects, the customer is XX, to achieve the insurance project in the XX process, and I know some background
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