what database structure

BackgroundCode first when the model is modified, to persist in the database, the original database is always deleted and then created (dropcreatedatabaseifmodelchanges), this time there is a problem, when our old database contains some test data ,

C # using GetOleDbSchemaTable to get Access database structureADO can use the GetOleDbSchemaTable method to get the structure of an Access database, but the content of the resulting DataTable is not very clear (such as the Data_type field)Here is a

First, select the appropriate data type1. Use the smallest data type that can save data2. Using a simple data type, Int3. Use NOT NULL to define fields whenever possible4. Minimize the use of text, not the best sub-tableStoring date time with

The Tigase database has many tables, the most important of which are 3 tables: Tig_users,tig_nodes and Tig_pairs.1.tig_usersTig_users stores user information, has a UID (primary key, User ID), user_id (username), USR_PW (user password) and other

New XSQL Schema compare-version 5Compare the schemas of the SQL Server databases, review differences, generate synchronization script and execute It-xsql Schema Compare makes database change management easy.XSQL Schema Compare supports SQL Server, 20

My requirement here is to make a number of identical databases, which are tied to each other (of course, the data in these libraries is different)Use of the Vs2013,sql Server20101. Select the database you want to copy, right-click, task, Generate

Author: Tonny Reprint please show the Source: http://www.weiw.com Database structure operations. Adapts to common databases such as Access,sql server. 1. Establish a connection. Can be connected through ODBC or OLE DB. Set GOBJDC =

Data | database | Database structure--with a script SQL200 Enterprise Manager --Right-click the database you want to copy --All Tasks --Generate SQL scripts -- select "Generate All Object Script", "include descriptive title in script file" selected

Help./backup.mysql.struct.shusage:./backup.mysql.struct.sh {Init|start|stop|status|restart}Create Backup user for your database.CREATE USER ' backup ' @ ' localhost ' identified by ' Sajepom6bapomofod7xo3e1a52vepe '; GRANT SELECT, LOCK TABLES on *. *

1. Select the appropriate data typeFirst, select the data type that can save the smallest data typeSecond, you can use a simple data type. int is simpler than varchar in MySQL processingThird, use NOT NULL to define fields whenever possibleFour, to

Today using PowerDesigner, to import the MySQL table structure into the Powerdesginer,Record the specific steps:1, first to ensure that the machine installed MySQL ODBC driver, to http://dev.mysql.com/downloads/connector/odbc/5.1.htmlDownload

First, prefaceThe application of the rights management system should be used in three different natures,A, permission to useB, assigning permissionsC, Authorization permissionsThis article only from the "Use Rights" and "assign permission" Two

BackgroundCode first when the model is modified, to persist in the database, the original database is always deleted and then created (dropcreatedatabaseifmodelchanges), this time there is a problem, when our old database contains some test data ,

Original address: http://blog.csdn.net/luoyeyu1989/article/details/8275237BackgroundCode first when the model is modified, to persist in the database, the original database is always deleted and then created (dropcreatedatabaseifmodelchanges), this

ObjectiveAs a result of technology transformation, most of the work is mainly WPF, but it is difficult to find a satisfactory WPF Rights Management Framework on the web now, because WinForm was a set of rewritten permission frames.so the database

--Create a tableCREATE TABLE EMP1 (Empno number (a) unique,ename VARCHAR2 () default NULL,Sal Varchar2 (20));--Create TABLE: Create from original tableCREATE TABLE EMP2 as SELECT * from Fasp_t_causer;--Create a tableCREATE TABLE Emp3 (Epton number (3

1. Open Navicat for MySQL, find the structure synchronization of the tool.2, select the target database and the source database, the following will generate a series of structure synchronous SQL, so we take the third stepFor example, you have a data,

BackgroundCode first when the model is modified, to persist in the database, the original database is always deleted and then created (dropcreatedatabaseifmodelchanges), this time there is a problem, when our old database contains some test data ,

BackgroundCode first when the model is modified, to persist in the database, the original database is always deleted and then created (dropcreatedatabaseifmodelchanges), this time there is a problem, when our old database contains some test data ,

In the process of optimizing the application of the database class, we learned a principle that the thought should be grabbed from the structure design, in the following order:1. Database logical structure design and physical design.2. Database