oracle sql certification book

Package Description:Oracle DBA Database Senior Engineer (lower) SQL language + performance optimization + data replicationHttp://edu.51cto.com/pack/view/id-973.html oracle DBA Database Senior Engineer Training course is the wind brother alone research and development of the fine combat courses, the road map is mainly to let everyone fast employment , high-paying employment. The course content is bas

you want anything better than this? There are support teams, and there are really writing code of the guy, what problems can not be solved? There are also times when some senior staff write a bright new book for you to browse. These people are sure to disclose to the public all the secrets they know about the workings of SQL and how to use them. Oracle is still

coexistence model are not mature. It is difficult to process the increasing number of users and data volumes.Limited scalability. OracleThe Parallel Server expands the function of the DRDs instance by allowing a group of nodes to share the work of the same cluster and provides a cluster solution with high availability and scalability.If Windows NT cannot meet your needs, you can move the database to Unix. DB2Good concurrency.Extends database management to a parallel, multi-node environment.

There were no things left idle in the past two days, and the project was soon launched. I read all the SQL statements I wrote in the project. With reference to the experience of optimizing SQL statements in previous years and the summary of SQL statement optimization methods on the Internet, and the powerful SQL analys

grade When grade> = 60 and grade Else 'bad' End as 'level' from score Go -- Oracle: Declare Nums number: = nos; -- nos indicates that the input value is prompted. Begin Case nums When 100 then Dbms_output.put_line ('full score is good too '); When 90 then Dbms_output.put_line ('90 paging is good '); End case; End; -- 8. The trigger creation syntax is different. -- SQL server: -- First, determine whether

Book Description Oracle PL/SQL recipesIs yourGoBook for PL/SQL programming solutions. it takes a task-oriented approach to PL/SQL programming that lets you quickly look up a specific task and see the pattern for a solution. then it's as simple as modifying the pattern for

data.CREATE TABLE author(A_ID Number (8) is not NULL,A_name varchar2 (100),A_age Number (3));CREATE TABLE book(B_ID Number (8) is not NULL,B_name varchar2 (100),A_ID VARCHAR2 (100));Insert into author values (1001, ' Zhangsan ', 40);Insert into author values (1002, ' Lisi ', 30);Insert into author values (1003, ' Wangwu ', 50);CommitInsert INTO book values (2001, ' Think in PL/

PL/SQL single-row functions and group functions A function is a program with zero or multiple parameters and a return value. Oracle has a series of built-in functions in SQL, which can be called SQL or PL/SQL statements. functions are mainly divided into two categories:Singl

');End case;End--8. Trigger creation syntax is differentIn--sql server:--first determine if the trigger already existsif exists (SELECT * from sys.sysobjects where name= ' Tr_delete ')--If there is a delete firstDrop Trigger Tr_deleteGo--Create a triggerCreate Trigger Tr_deleteOn BookInfoInstead of deleteAs--Defining variablesDECLARE @bookid intSelect @bookid =bookid from deleted---deleted execute DELETE statement (delete from BookInfo where bookid=1

system stability is very important to the database Windows9x series products focus on desktop applications NT Server is only suitable for small businesses, and Windows platform relies very limited on sexual security and scalability like Unix-like time-tested processing of large databases in particular;Scalability parallelism: SQL Server parallel implementation and coexistence model and mature difficult to handle the increasing number of users and the

Oracle re-indexing Shell script, SQL script sharing, oracleshell Indexing is a powerful weapon to improve database query performance. Without an index, it is like a library without a book tag. It is more difficult to find a book you want than to climb to the sky. However, in the process of using indexes, especially in

One: Select Cardid, borrowdate from borrow where To_char (To_date (borrowdate, ' yyyy-mm-dd '), ' yyyy ') = ' all ' and to_char ( To_date (borrowdate, ' yyyy-mm-dd '), ' mm ') >= ' "and To_char (to_date (borrowdate, ' yyyy-mm-dd '), ' mm ') Way two: Select Cardid, borrowdate from borrow where To_char (To_date (borrowdate, ' yyyy-mm-dd '), ' yyyy ') = ' all ' --query and To_char (To_date (borrowdate, ' yyyy-mm-dd '), ' yyyy-mm ') >= ' 2014-02 ' and to_char (to_date (Borrowdate, ' Yyyy-mm-dd '

Oracle optimizations are generally divided into:1. SQL Optimization (Oracle now performs the necessary optimizations based on SQL statements, which should not be user-like, but must be and affect performance as correlated and nested queries)A, the condition of the SQL statem

Index is a powerful weapon to improve database query performance. No index, just like the library without book tags, find a book they want to book than Heaven is difficult. However, in the process of using the index, especially in the case of batch DML, the corresponding fragments will be produced, and the B-tree height will change accordingly, so that these chan

Access the Oracle server through SQL J of DB2 Today I saw a book about Oracle SQLJ, so I want to give it a try. However, I only installed the Oracle thin client on Ubuntu 14.04. There is no SQLJ, so the sqlj thought of using the IBM-db2, it was successful. 1. Run runtime12ee

A well-designed, performance-capable database engine can easily serve thousands of users at the same time. And the "weak" database system with more users to access the system will greatly reduce its performance. In the worst case, it could even cause the system to crash. Of course, parallel access is the most important problem in any database solution, and various kinds of database systems are proposed in order to solve the problem of parallel access. SQL