best book for database management system

MARIADB database management System is a branch of MySQL. Mainly by the open source community in the maintenance, with the GPL license. One of the reasons for the development of this branch is that Oracle, after acquiring MySQL, has a potential risk of shutting MySQL out of the source, so the community uses branching to avoid the risk. MARIADB is designed to be fu

[a basket of rice special thin Original, reproduced please indicate from http://www.cnblogs.com/wanghafan/p/4595084.html]Query engineering details appear in the project management system cpu100% symptoms:1. Open Profiler trace Discovery [F_getprojectsum_detail] function card dead2. Run the statement separately " database error: An error occurred while performing

about what the interface should be (art online (ErrorYes, it's painted.　　In addition, in the Windowstyle=none, the maximized window will cover the taskbar, I checked, the online method is basically used to Win32 API, I stole a lazy, only in the MainWindow of the construction method to add a maximum height limit good.1 Public MainWindow () 2 {3 InitializeComponent (); 4 this. MaxHeight = SystemParameters.WorkArea.Height; 5 }And finally the Github:g

Common oracle database management system errors (2 ), Oracle databases always encounter the following problems for new users: I believe everyone has encountered such a problem. To be honest, I have encountered such a problem before, but I am sorry to ask the technical experts next to me, and I am a little skeptical about my life, then, I searched for the cause o

Label:In the current program, there are many places try Catch, program run exception, error and not be perceived, next to this issue to adjust, the principle is that any exception can be perceived, record and then be optimized processing; Serious error exception, must be able to notify the developer at the first time. Scheme:log4j Upgrade to Log4j2For different business, the use of different levels, different carriers of the logging format:1. log file record2. JMS Message push3.

Start with the database, because it's the EF code frist, so all the design is done in the solution project.First the data model beginsI've built four models, User,role,action,actiongroup.The user has actionids in Role,role that stores the ID combination string for the action, Actiongroup as the action group.So as long as you know the role of user, you can find his corresponding action action, to achieve the function of the rights management.In conjunc

'; Comment on column userz.usfje is ' water amount '; Comment on column use Rz.udfje is ' tariff amount '; Comment on column Userz.uzje is ' total amount of water and electricity '; Comment on column userz.udate is ' payment date ';-- Create/recreate Primary, unique and FOREIGN KEY constraints ALTER TABLE Userz add constraint Pk_uno primary key (UNO) ;　　--Create tablecreate table water ( uno VARCHAR2 (4) Not NULL, wmonth CHAR (6) is not NULL, Wyl number ( 8,2) NOT NULL, usfje num

Date'; Comment on columnShuifei.sjfzt is 'Payment Status'; Comment on columnShuifei.ssyjf is 'last month payment date';Alter TableShuifeiAdd constraintPk_shuifeiForeign Key(UoN)ReferencesUuser (uon);Alter TableShuifeiAdd constraintPk_shuifeiaForeign Key(Mmonth)References Money(Mmonth);Drop Table Money;Create Table Money(Mmonthvarchar2(6) not NULL, Mwater Number(4,2) not NULL, MPower Number(4,2) not NULL); Comment on column Money. Mmonth is 'Payment Month (primary key)'; Comment on column M

The second stage of self-examination textbooks began a few days, and recently have been looking at the database system principle, what function depends on what the transition between models. Indeed a little pressure, but the difficulty is certain, see everyone is so hard to learn, then step up! Here is my summary of the first three chapters of the database ratio

I wrote an example book for getting started with Delphi with a colleague in.Delphi common database module and typical system development,At that time, I realized that writing a book is not as simple as I thought. Basically, I didn't want to write a book in my spare time. One

are most appropriate for the database business requirements. This figure shows 4 filegroups, one at a time, for each filegroup. Their backup order (a, C, B, a) reflects the business requirements of the database.Under the full recovery model, restoring a filegroup backup requires not only restoring the filegroup backup itself, but also restoring all log backups from the last full database backup to the targ

filegroup. Their backup order (a, C, B, a) reflects the business requirements of the database.Under the full recovery model, restoring a filegroup backup requires not only restoring the filegroup backup itself, but also restoring all log backups from the last full database backup to the target point in time of recovery. To ensure that the file remains consistent with the rest of the database. So the number

MySQL is fairly simple to use when running a database system, and there is little work required to install and use MySQL. However, no matter what level of expertise you are, MySQL's installer does not run automatically. Someone has to monitor it to make sure it runs smoothly and efficiently, and sometimes it has to know what to do when the problem arises. And MySQL's ma