peoplesoft database tables

Question: How does JPA automatically create a database table (how does it automatically map entitybean to a database table without having to create a table before developing an application?Program) Add the following setting statement to persistence. xml:// 1: value = "Create-drop" indicates that the table is automatically created when the JPA application is used, and the corresponding table is deleted when

Database Library (sharding) series (v) a sharding expansion scheme Database (sharding) that supports free planning without data migration and modification of routing code Series (iv) Transaction processing database for multiple data sources ( sharding) Series (iii) Consideration of the use of frameworks or autonomous development and the implementation of

It helps you easily understand that the compressed table features in the MySQL database are compressed and stored in a read-only format created by myisampack. Myisampack is included by default in all MySQL distributions. Compressed tables can be decompressed using myisamchk. Compressed tables have the following features: ? Compressed

Select table_name, row_nums from user_tablesYou can check it out, but before using this statement, you need to analyze each database table so that the number of records is accurate. However, this is not enough for online production business tables, because the production business tables are changing at any time, it takes a long time for a large table to analyze t

mysql| Backup | recovery | data | database | page Backing up data $i = 0; $crlf = "\ r \ n"; $dbname = "XGTQR"; Global $dbconn; $dbconn = mysql_connect ("localhost", "root", "root"); $db = mysql_select_db ("XGTQR", $dbconn); $tables = Mysql_list_tables ("XGTQR", $dbconn); $num _tables = @mysql_numrows ($tables); while ($i { $table = Mysql_tablename ($

a20050115 NULL NULL(The number of rows affected is 5 rows)Result Description:The left join is based on the records of Table A, a can be regarded as the right table, and B can be regarded as left table.In other words, the records of the left table (A) will all be represented, and the right table (B) will only display records that match the search criteria (in the example: A.aid = b.bid).The low-record of table B is null.2. Right JoinThe SQL statements are as follows: SELECT* from A RightJOINB on

Excel reads database tables and excel reads Databases The following code is used to read the table fields of a database using an Excel macro. Public Sub getdata () Dim cnn As New ADODB. connection, sh As Worksheet Dim rs As New ADODB. recordset Dim cnnStr As String, SQL As String cnnStr = "Provider = SQLOLEDB; Initial Catalog = BI" "; User ID = sa" "; Password

As a database administrator, you try to provide departments with the data they need, in different formats that are well known to each department. You usually submit data in MS Excel format to the accounting department, or the data is presented as an HTML report to a regular user. Your system security administrators are accustomed to using a text reader or Event Viewer to view the log. This article describes how to use triggers to record changes to a p

Tags: successful right Oracle DBCA Access database data source ACL ODBC data source click1, the computer installed Access database around 25M2. To create an ODBC data source, select OracleC:\Windows\SysWOW64\odbcad32.exe3. Open the. mdb file you want to importRight-click Table--"Export"Export ODBC Database", the table name must be all uppercaseAre you sureClick o

, weeks How to select the primary key (the best order growth, so that no logical data migration, the benefits of I/O performance) Avoid using FOREIGN KEY constraints: 1. Reduce the efficiency of data import 2. Increase maintenance costs 3. However, the associated column must be indexed Avoid using triggers: 1. reduce the efficiency of data import 2. Unexpected data anomalies may occur 3. Complicate the business logic about reserved fields: Not very important, reserved fields are strictly forbidd

[email protected] 'exec sp_executesql @s,n ' @objname sysname out, @id int ', @objname out, @idINSERT into #t values (@rid, @objname)FETCH NEXT from TB to @rid, @dbname, @idEndClose TBDeallocate TBSelect Process Id=a.req_spid, Database =db_name (rsc_dbid), type =case rsc_type when 1 Then ' NULL resource (not used) 'When 2 Then ' database 'When 3 Then ' file 'When 4 Then ' index 'When 5 then ' table 'When 6

Label:1. Trigger, database trigger action. When the database is complete,Delete the main table after the sub-table, connect the database too many times, performance estimation is not good. 2. Cascade Delete When you create a table, the B table is defined as follows: CREATE TABLE A (ID varchar ( -) primary key, password varchar ( -) notNULL) CREATE TABLE B (IDint

The following code is used to normally read a table field of a database with an Excel macro Public SubGetData ()DimCnn as NewADODB. Connection, SH asWorksheetDimRs as NewADODB. RecordsetDimCnnstr as StringSql as StringCnnstr ="Provider=sqloledb;initial Catalog=bi""; User Id=sa ""; password=aa123456 "";D ata source=172.16.0.73"Cnn. ConnectionString = cnnstr CNN. Open SQL ="SELECT * from Dbo.tt"MsgBox"Execute query Data start:" SQLSetrs = cnn. Execute (

Statement [SQL] declare @ tablenamenchar (20) declare @ fieldnamenchar (50) declare @ SQLStringnvarchar (300) Statements for querying all tables in the database -- declare cursor; -- game Statement [SQL] declare @ tablename nchar (20) declare @ fieldname nchar (50) declare @ SQLString nvarchar (300) DECLARE tnames_cursor cursor local FORWARD_ONLY READ_ONLY -- DECLARE the cursor for select name from sysobjec

MVC5 + EF6 simple example --- take the two tables of the original SQLServer database for joint query as an example, mvc5ef6 Tools: VS. net2013, EF6, MVC5, and SQLServer2008 Reference: Http://www.cnblogs.com/slark/p/mvc-5-get-started-create-project.html Http://www.cnblogs.com/miro/p/4288184.html Http://www.cnblogs.com/dotnetmvc/p/3732029.htmlI. Preparations Create a

Generate class source files (Code generators) and source file code generators for tables in the database. Generate class source files for tables in the database Using System; using System. collections. generic; using System. data; using System. data. sqlClient; using System. IO; using System. text; namespace ModelCodeG

: This article describes how to replace database tables in batches in mysql. For more information about PHP tutorials, see. Tables_in_jiameiyake;} // print_r ($ data); // table prefix foreach ($ data as $ k => $ v) {$ preg = preg_match ("/^ ($ old_prefix {1}) ([a-zA-Z0-9 _-] +)/I", $ v, $ v1); if ($ preg) {$ tab_name [$ k] = $ v1 [2] ;}// print_r ($ tab_name); if ($ preg) {// replace the table prefix for

Queries the disk space used by all databases in mysql and the size of all tables in a single database bitsCN.com Query the disk space used by all databases in mysql and the size of all tables in a single database SQL code Select TABLE_NAME, concat (truncate (data_length/1024/1024, 2), 'mb') as data_size, Concat

When a database is inserted, when multiple tables are joined, it does not seem easy to do. for example, in Table a, Table B, insertintoa (text) values (hello); idprimaryasc, then an auto-increment id is generated, then I want to store this id in Table B. It seems that mysql_insert_id () can be used. However, if many people operate on this id at the same time, I don't know what the situation is, because some

Two tables in the mysql database establish a relational table 1 page :( page_id, page_text, img_exist) = gt; (page id, page content, whether Image 1 exists, 0 does not exist) table 2 image :( img_id, img_name) = gt; (image id, image name) nbsp create a relationship between two tables in the mysql database Table 1 pa