oid

There is a user table a with fields such as OID (primary key, auto-incrementing), username, gender, and creation time. Then there is another Table B, where the field is the primary key OID of the user table and the corresponding user identity RID.

Mysql efficient programming reading abstract-basic article bitsCN.com Mysql efficient programming reading abstract-basics 1. join multiple tables 1. inner join-the primary key of the table is connected to the foreign key, and only data with the

This article mainly introduces the use of YII2 back-end development of the analysis, has a certain reference value, now share to everyone, the need for friends can refer to Yii2 is a high-performance, component-based PHP framework, this article

Hibernate divides the objects that are manipulated into three states:1.Instantaneous (Transient)/temporary state/Free StateDurable (persistent)Off-tube (Detached)Instantaneous object characteristics:First, not in the session cache, it can be said

Hibernate we have been learning for four days, the knowledge we have finished, tomorrow's holiday, the day after day will end the study of hibernate, a little out of it, want to hibernate is not so difficult to say, The three more important concepts

There is a scenario where the user has two consecutive operations A and B, must be operation a completed before the operation B, if action A is not completed to trigger action B, then the user needs to perform action A, that is, the operation B

[PHP] if (Isset ($_get[' order_id ')) && $_get[' order_id ']!== ') { $oid =$_get[' order_id ']; $result = $db->execute ("Select ' D_no ' from ' delivery ' where ' oid ' =". $oid); $delivery _no= '; if ($result->recordcount () >0) { while (! $result->

SNMP (Simple network Management Protocol), which is one of the most commonly used data acquisition technologies in the field of network and system monitoring. Although this protocol is very simple, but in the large-scale IT environment monitoring,

Doyocms parallel permission issue-order Leakage Doyocms parallel permission issue-order Leakage Order unauthorized view VulnerabilityThe problematic code is located at source/member. php.  function

Or-Mapping) From the process of designing and developing the workflow management system and information sharing platform, we constantly explore the methods of Object-Oriented Analysis and object-oriented design.ProgramDesign is closer to people's

TOAST function in PostgreSQL The content of TOAST in PostgreSQL is stored in another object, which is different from the OID of the original table. Similar to the LOB type storage in Oracle (the out-of-line Storage is stored in lobsegment by default,

All information of a device that needs to be managed is considered as a collection of various managed objects. These managed objects are defined by OSI in a managed Information Base (MIB) in the virtual information library, the following is the Mrtg

In order to find this information, I can work hard to find a possible Bug in PostgreSQL, and check the source code of PostgreSQL to guess how to obtain fields with the auto-growth attribute. But the overall feeling is much more reasonable than the

The following error always occurs when you connect to sqlserver2005 using Java. Jan 24,200 8 12:05:34 com. Microsoft. sqlserver. JDBC. tdschannel enablesslInformation: Java. Security path: C: \ Java \ jre6 \ Lib \ SecuritySecurity Providers: [Sun

section II: Session Common Methods explained2) load and get () method:There is no record in the database corresponding to the OID, and the load () method throws an exception: the Load method defaults to lazy loading, and the Load object is a proxy

Persisted object PO class state1. Status classification transient transient state: Hibernate's session cache is not stored and no data is in the database. For example, New PO class, no OID value Persistent Persistent state: Hibernate is stored in

1, the amount of data is small, user operation behavior fixed:Storage: MySQLScenario: We take the UID as key, a line of users, each user included as a column storage, such as uid=100, fixed storage for operation A and Operation B, the table

excerpt from the network: The first level cache in Hibernate is in the form of a map, the key is the primary key, and value is the object, so its generics are mapobject>, The generics of key are serializable because the primary key can be

1 Data Sheets Book,user table. A one-to-many relationship, a book with multiple authors. CREATE TABLE Book (OID Int (a) not NULL,Name varchar DEFAULT NULL,PRIMARY KEY (OID)); CREATE TABLE User (ID Int (a) unsigned not NULL,Name varchar DEFAULT

Turn from: http://www.cnblogs.com/szytwo/archive/2012/03/21/2409536.html First, the basic application of data sets 1. Table New Record Way One: Use the BindingSource AddNew New record, recommended for use, cursor position in current new record,