Oracle

In the EO of the ADF, there are many ways to validate data, one of which is list validation. Next I'll use the money field as an example to show you how to use LIST validation.Graphic:650) this.width=650; "src="

Oracle third-party management tools collation1, OB (SI Object Browser)Official website: http://www.ctdw.com.cnDescription: Small software big function, personal favorite its database import, export function, one-click Import and Export, convenient

A pattern or scenario s is actually a collection of database objects owned by the userCreated to manage usersIdentity verification3 Methods of authentication are available1. Password verificationBecause user information and passwords are stored

• Introduction1) Data Base (database)A storage warehouse for storing data and managing data is a collection of data that is effectively organized together.2) Common database softwareLarge database: OracleSmall database: MySQL MySQL3) RDBMS

1. Interval partitionThe interval partition is an enhancement of range partitioning, enabling automation of range partitioning that automatically creates new partitions and local indexes.Test examples:Create a partition table first,Write data that

1. Basic StructureCREATE OR REPLACE PROCEDURE Stored procedure name(Parameter 1 in number,Parameter 2 in number) isVariable 1 INTEGER: = 0;Variable 2 DATE;BEGINEND Stored Procedure Name2.SELECT into STATEMENTStoring the results of a select query in

Install the Oracle LIUNX 6.5 development Pack Select all or install MySQL error later[Email protected]/]# Cd/tool[Email protected] tool]# TAR-XVF Mysql-5.7.11-1.el6.x86_64.rpm-bundle.tarView the original installed MySQL[Email protected]/]# Rpm-qa |

Partitioning a large data volume index can also optimize the performance of the application system. In general, it is recommended that the index be partitioned if the data for the table that corresponds to the index is very large, such as millions

Personal feeling this thing is better than Plsql, although the interface is a bit ugly, the whole use and plsql also not much difference, here is his position C:\oracle_11g\product\11.2.0\dbhome_1\sqldeveloper\ Sqldeveloper.exeThe entire open

1. Plsql Export data structures (datasheets, sequences, triggers, functions, views)1) on the left, click Tables2) tools--"Export User Objects3) Red 1 is the table you want to choose to export, the Red 2 is the one you want to export to. sql file to

The distinction between partitioned tables and table partitioning is clarified first: Table partitioning is an idea, and partitioning represents a technology implementation. When the size of the table over G can consider table partitioning, improve

Here's how to fix it:1: Check V$db_object_cacheSELECT * from V$db_object_cache WHERE name= ' cux_oe_order_rpt_pkg ' and locks!= ' 0 ';Note: Cux_oe_order_rpt_pkg is the name of the stored procedure.Discover locks=22: Find the SID value by

Login Database Display garbledThe reason is that the database has different character sets on the client and service sideIdentify the character set on the service sideSQL>Select userenv ('language' from dual; USERENV ('LANGUAGE')---------------------

First, using RowNum, no order by (optimal scheme)The following example queries out 5003 rows of data, then throws out the previous 5000 rows, returning 300 rows. After testing, this method is the lowest cost, nesting only one layer, the fastest!

Classification of databases1. Small database access, foxbase load is small, 1000 people, such as message book, within the cost of thousands of dollars2. Medium database SQL Server, MySQL, Informix Daily visit volume 10000--15000, cost in million3.

Role:1. Stored procedures are compiled only at creation time, and normal SQL runs once per execution, so using stored procedures can improve database execution speed. 2. When complex operations are performed on a database, such as when you update,

Character typeChar fixed length, Max 2000 characterschar (10) ' xiaoming ', followed by 6 characters will be wasted, suitable for defining fixed-length and frequently queried fields, such as ID number, high efficiencyVARCHAR2 variable length, max 400

Implicit conversion of ORACLE binding variables causes performance problems. oracle binding After a system upgrade, the database monitoring tool DPA found that the Total Wait time of the database suddenly increased. As shown in the following figure,

Basic Introduction to Oracle and commonly used SQL * plus commands, oracleplus Run Database Configuration Assistant as an administrator to create a Database instance. To use Oracle, you must first start the Oracle service, find the service in the

Oracle trigger usage example details, oracle trigger instance This example describes how to use Oracle triggers. We will share this with you for your reference. The details are as follows: I. Introduction to triggers The trigger definition means