Oracle

One, the spy of the binding variable (PEEK) 1, Oracle in the processing of SQL with binding variables, only in hard parsing will "pry" the value of the binding variable in SQL, and then based on the value of the detected to determine the entire SQL

Previous work to do data synchronization used in the trigger, made the following notes, summarized as follows: Data center----------------------------------College Create or replace trigger TGER_XX_YXSDWJBSJZ L_ist before insert on ZFDXC.

Since 10g, Oracle has provided more efficient data Pump (i.e., EXPDP/IMPDP) for the import and export of imports, and old exp/imp can be used, but is not recommended. Note: EXPDP/IMPDP and Exp/imp are incompatible, that is, exp exported files can

Oracle Performance tuning is a broader and somewhat more complex topic, and the biggest problem for ordinary DBAs is where to start and what to do. All the information you know may be someone (a user) who reports a problem with the performance

Modifying a table definition (DDL) is a very painful process for an 7*24 online production system, because if you use the ALTER statement directly, an exclusive lock is placed on the table, meaning that all of the DML and select cannot be

Abstract OLE DB is an open specification built on the success of ODBC, which provides an open standard for accessing and manipulating different types of data. ADO is a consumer of old db that provides access to OLE DB data sources at the application

Oracle The Java Database Connectivity (JDBC) API is a series of interfaces that enable Java programmers to access the database, and the interfaces of each developer are not exactly the same. After years of JDBC with Oracle, I've accumulated a lot of

A cursor is a data extracted from a datasheet, stored as a temporary table in memory, with a data pointer in the cursor, a first record in the initial state, a fetch statement to move the pointer, a variety of operations on the data in the cursor,

Oracle local time 18th released a July security update to repair 65 software deficiencies, including a number of serious cross product issues. The repairs include many serious weaknesses. Darius Wiles, Oracle's senior manager responsible for

oracle| Skills | data | database The Java Database Connectivity (JDBC) API is a series of interfaces that enable Java programmers to access the database, and the interfaces of each developer are not exactly the same. After years of JDBC with Oracle,

Oracle Oracle Basics Easy to learn: 1. A tablespace can only belong to one database. 2. Each database has at least one control file (recommendation 3, placed on separate disks). 3. Each database has at least one table space (System tablespace). 4

Oracle| performance Everything has its source, to solve the problem, also have to start from the source, the impact of Oracle performance is very many sources, mainly including the following: Hardware configuration of the database: CPU, memory,

oracle| temporary table | speed | optimization 1. Preface At present, all use Oracle as database support platform application, most of the data volume of the system, that is, table data volume is generally in millions above data volume. Of course it'

Oracle part fourth, performance tuning [Q] If automatic tracking is set [A] Login with System Execute $oracle_home/rdbms/admin/utlxplan.sql Create a schedule Perform $oracle_home/sqlplus/admin/plustrce.sql create plustrace role If you want to

oracle| Stored Procedures From the beginning to learn PHP to Joy International village, for several months, learned a lot of things, I wrote an example hope a little useful. The PHP program accesses the database and can use the stored procedure

oracle| Design | data | database | Database design Requirements Prerequisite: Data changes 1~2 times per year, software estimated life cycle 50 Practice Environment: Oracle Spatial Glossary: spatio-temporal objects, snapshots Spatio-Temporal

Oracle Objective Over the past decade, Oracle has become one of the most professional databases in the world. For IT professionals, it is important to ensure that Oracle's powerful features are used to improve the productivity of their companies.

oracle| optimization Oracle Optimizer: Migrating to using the cost-based optimizer-----Series 2.1 Series bis contains initialization parameters and Oracle internal hidden parameters that affect the optimizer's choice of execution plan, and it is

Oracle "Recycle Bin" in Oracle 10G by fenng Http://www.DBAnotes.net In Oracle 10G, the concept of a Recycle Bin (recycle Bin) is introduced. The Recycle Bin, in principle, is a data dictionary table, where the user drops the database object

Statspack 10 items that must be viewed in the output result 1, load between files (load profile) 2, instance efficiency click Rate (Instance efficiency hit ratios) 3, the first 5 waiting events (Top 5) 4, Waiting for events (wait event) 5.