how to use dblink in oracle sql

, this works fine. --This is the administrator's replyPL/SQL Developer is written in Delphi.The first thing that needs to become available is a a-bit version of the Delphi IDE.Another post also mentions:Hi when install in Windows Server 2003 R2 X64.When I try to connect a account, I has the following message:Initialization errorCould not load "E:/oracle/product/10.2.0/bin/oci.dll"--The following is an admin

/gravity /center ">Found two commands together, namely student and where are connected together. So when you use the a command to add a command to the buffer to hit two return, the first carriage return is a command must take the carriage return, the second carriage return is added as the beginning of the new code to the buffer, for example:Q: Suppose the buffer has 3 rows of SQL commands, you need to join

From: http://livenzhao.spaces.live.com/blog/cns! 6e0000be9f6ddd872! 595. entry· PL/SQL Developer skills 1. PL/SQL Developer remember the Login Password When PL/SQL Developer is used, PL/SQL Developer needs to remember the username and password for logging on to Oracle for

directly to the results, it is the implementation of Soft Soft Parse. The steps of 2.3.2 parsing can be divided into two steps: 1) Verify that the SQL statement is fully consistent. In this step, Oracle will use the hash function to calculate the hash value for the incoming SQL statement, and then compare it with

How to check whether the SQL statements are correct when executing large SQL statements in Oracle stored procedures? A large SQL statement is sometimes used in the preparation of a stored procedure in Oracle. However, you cannot see the

The following articles mainly introduce the recommended solutions for Oracle SQL optimization rules. If you are a beginner in the practical application of Oracle SQL optimization rules, you can use the following articles to better understand the actual operations of the reco

Oracle SQL query optimization for Oracle Data Scanning (2) 2. How to improve the performance of local range data scanning: 2.1 category and role of query conditions: When we initiate a SQL statement with conditions, multiple query conditions are usually assigned to the statement. Among these query conditions, one or m

triggersA. Enabling and disabling triggers: When to prohibit: Prohibit data import and exportsql> ALTER TRIGGER aiu_itemfile DISABLE;sql> ALTER TRIGGER aiu_itemfile ENABLE;B. recompiling a trigger: After a database object has changedC. Deleting a triggersql> DROP TRIGGER Aiu_itemfile;19. Triggers and stored proceduresTrigger Stored proceduresWrite no parameter, return value has parameter, return value (parameter)Write cannot commit or rollback canCal

, plus detailed information about the wait time. For each wait in the processing process, the following information is provided: the name, duration, and some additional parameters of the waiting time, indicating the resources to be waited12Both startup level 4 and Level 8Before Oracle 9i or, the following SQL statement activates an SQL trace for the session: ?

SQL optimization should be adjusted from five aspects:1. Remove unnecessary full table scans for large tables2. cache full table scan for small tables3. Verify the use of optimized Indexes4. Verify the optimized Connection Technology5. minimize the Cost of the Execution Plan SQL statement:Is the only way to operate databases (data;70% ~ 90% of database resources;

, training costs. Two companies claim to have a better performance price, in fact, Oracle company side Focus on the reliability and practicality of the product, while Microsoft focuses more on product pricing. Because of the operating system's Reasons, it is generally accepted that SQL Server is less reliable, while Oracle's initial costs are relatively high, especially

business factors, the customer did not directly display the use process and interface of the tool, but told us the general principle: the tool first defines a set of scoring rules, for example: whether to bind variables to SQL statements; whether there are functions before condition fields; whether there are more than 4 tables connected to multiple tables... ..., Then, the entered

Oracle environment and support all data processing commands. Process SQL data definition and data control elements by using the PL/SQL program unit. . Pl/sql supports all SQL data types and all SQL functions, while supporting al

default password is Change_on_install.B. The system user is a management operator, has a large authority, has a sysoper role, does not have the CREATE DATABASE permission, and the default password is manager.C. In general, for database maintenance, use the system user to log on.4. The difference between SQL Server and Oracle Startup:After

This document is compiled and summarized based on relevant information. It mainly describes the most authoritative and correct methods and steps for obtaining SQL statement execution plans in Oracle databases. This document is compiled and summarized based on relevant information. It mainly describes the most authoritative and correct methods and steps for obtaining SQL