Database Administrator

Hibernate dynamic multi-database, hibernate DatabaseRecently, the teacher gave me a task. The requirement is as follows:Server A has A table containing several server information. The table fields include: private int id; private String

SQL subquery and stuff functions (convert multiple roles and multiple departments into strings), sqlstuff USE [erp2015] GO/****** Object: StoredProcedure [dbo]. [GetUser] Script Date: 03/14/2015 13:27:04 ******/SET ANSI_NULLS ONGOSET

Clear the WRH $ _ LATCH_CHILDREN table and sysauxwrh table in the SYSAUX tablespace. On Saturday, the system was suddenly woken up by text messages. 63 messages appeared, all of which were in monitoring. The tablespace size exceeded a warning value.

Oracle object type Oracle object typeObject Type In PL/SQL, object-oriented programmers are based on object types. The object type is a user-defined Composite data type. It encapsulates the data structure and processes and functions used to

[PLSQL] use of the package, plsqlpackage**************************************** ********************************* *** Original article: blog.csdn.net/clark_xu Xu changliang's column**************************************** ***************************

Automatically back up the mysql database and send it to the e-mail method, mysqlemail A blog, the most important thing for a website is a database, so it is necessary to back up data frequently.WordPressThere is a plug-in for regular data backup,

CBO Full Table Scan, cbofulltablescan Reprinted please indicate the source: http://blog.csdn.net/guoyjoe/article/details/44261859 **************************************** *******I. Full Table Scan-FTS algorithm of CBO*********************************

In Access, case when then else end does not support switch instead. caseswitch In Access, case when then else end cannot be replaced by switch. Here, we mainly implement multiple fields in a table, compare multiple fields, and obtain the maximum or

ORA-28040: No matching authentication protocol, ora-28040matching An error is reported when you use the hibernate + oracle database. The error is as follows: 121 [main] INFO org. hibernate. cfg. Environment-Hibernate 3.3.1.GA147 [main] INFO org.

If garbled code is not dead, continue to work hard .. I thought I had done a good job in dealing with Garbled text, but on this day I gave me a great deal of weight, which made me suffer, self-contained ..... The garbled characters I mentioned here

Mysqli pre-compilation mechanism for batch data processing, mysqli compilation Mechanism The mysqli enhancement also includes the addition of the Transaction Processing Mechanism and pre-compilation mechanism. In fact, both of them are for the sake

ORA-00600 ORA-01565, ORA-27046Yesterday in the Data Pump import and export, suddenly encountered a ude-00008 error, view the log file: Errors in file /oracle/afcprd01/db/10.2.0/admin/afcprd01_afcdb/bdump/afcprd01_dbw0_1417220.trc: ORA-00600:

Javaee-jdbc, javaee 1. First import the jdbc-mysql package 2. Program Framework: 3. Database Configuration File Driver = com. mysql. jdbc. DriverUrl = jdbc: mysql: // localhost: 3306/jdbc_dbUsername = rootPassword = 1234 4. Access the underlying

ORA-01688 error resolution, ora-01688 Error The ORA-01688 error was reported when the ticket data was imported during the performance test and the ticket data import failed. ORA-01688: unable to extend table VMSREPORT. VMS_DEPOSIT_MSG_SDR partition

MySql learning, mysql learning notesSet two database tables for database query The first table user contains: User_id Username Age Sex 1 Alps1992 22 Man The second table toy contains

Batch CRUD data of Mysqli, mysqlicrud After learning to use the mysqli extension library, the overall feeling is more rational than the process-oriented method, object-oriented is the trend of the times, so we must not just use that old mysql

Meaning of => in oracle function parameters, meaning of oracle function parameters Author: iamlaosong Today we see an MD5 encryption problem. Many languages provide encryption functions. oracle also provides MD5 encryption functions. I searched

Oracle archive and non-archive Modes Oracle archive mode and non-archive Mode settings The log archiving mode of Oracle can effectively prevent instance and disk faults and is indispensable for database fault recovery. Because the initial

MongoDB MapReduce practice , mongodbmapreduce Requirement: a log table in the Mysql table requires an average record cycle of the statistical data. In practice, it may be difficult to use Mysql. Use the MongoDB you just came into contact, I can

Mysql optimization notes, mysql Optimization[Mysql optimization part]General Optimization ideas:A. Table Design rationalization (in line with 3NF)B. Add an appropriate index)Mysql indexes are roughly divided into four types:Common Index, primary key