how to use dblink in oracle sql

Abstract: In the PL/SQL development process, SQL, PL/SQL can be used to meet most of the requirements. However, in some special cases, standard SQL statements or DML statements in PL/SQL cannot meet your needs. For example, dynamic table creation or an uncertain operation mu

SQL Server, db2, and oracle Stored Procedure dynamic SQL statement example Oracle Create or replace procedure a_testAS t_ SQL VARCHAR2 (2000); t_a VARCHAR2 (20); t_ B VARCHAR2 (20); t_c VARCHAR2 (20); t_d VARCHAR2 (20); BEGIN t_c: = 'F'; t_d: = 'G'; -- any

SQL server, db2, oracle Stored Procedure dynamic SQL statement example, db2oracle Oracle Create or replace procedure a_testAS t_ SQL VARCHAR2 (2000); t_a VARCHAR2 (20); t_ B VARCHAR2 (20); t_c VARCHAR2 (20); t_d VARCHAR2 (20); BEGIN t_c: = 'F'; t_d: = 'G'; -- any

Oracle is not installed, and pl/SQL is directly used to connect to oracle server in 3 minutes. Many people, especially those who do not like oracle, must learn from oracle and think that oracle occupies a lot of memory. I do not l

Related link parsing Oracle data scanning Oracle SQL optimization guide local scanning method (1) http://www.bkjia.com/database/201205/130424.html Parsing Oracle data scanning Oracle SQL optimization guide local scanning method (2

;preferences-->window types, hook on "AutoSelect Statement" can. 4. View Execution Plan When using the SQL window of PL/developer, sometimes the efficiency of input SQL statement execution, analysis of the following table structure, how to improve the efficiency of the query, you can view the execution plan provided by Oracle; To

to parse a Times, 1 million users is 1 million times, consumes CPU and memory, if the business A large amount, which is likely to lead to downtime ... If you bind a variable, you only need to parse it hard once, and repeat the call to2.6.2 binding variables to resolve recompilation problemsFor example: Select *from ur_user_info where contract_no = 32013484095139 Select *from ur_user_info where contract_no = 12013481213149 Using bound variables Select *from ur_user_info where Contract_no =:contr

SQL statements (the time consumed by the system is listed in SQL run time) and applies Oracle hints directly to it, you can select SQL statements that consume the least time. The tool is very easy to use and saves a lot of time for our optimization work. (Tool: http://files

installation of weapons is a top priority. There are four modules in the system: Fleet information Management, warship information management, military officer information management, weapon information management. At the same time in the four systems to be inserted, query, change and other changes. Based on these analysis, the data flow chart is drawn out, the dictionary is written out, and the corresponding CDM,LDMandPDM are drawn using Power Designer . Create a table space, create a user, as

Develop PL/SQL subprograms and packages, write triggers using PL/SQL, and Apply Oracle and pljdbc to JDBC. 1. subprograms: Declaration, executable, and Exception Handling (optional) 2. subprogram classification: A. Process-execute some operations A. syntax of the creation process: CREATE [or replace] PROCEDURE BEGIN [EXCEPTION END; B. Three Modes of process p

are four modules: Fleet information Management, warship information management, military officer information management, weapon information management, and in the four systems to be inserted, query, modify and other changes. Based on these analyses, the data flow chart is drawn out, the dictionary is written out, and the corresponding CDM,LDM,and PDM are drawn using Power Designer . Create a table space, create a user, assign permissions, create a user profile, and then build tables, views,

Cause of SQL Text "** SQL Text Not Available **" in the Oracle ash Report: oracleash Guess: Why "** SQL Text Not Available **" appears in SQL Text in the Oracle ash report The HVR data synchronization software is being tested toda

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Ubuntu 14.04 Build php5+apache2+oracle Environment A recently developed project that uses Oracle for databases. Oracle itself supports Red Hat, and the support for Ubuntu is not good, and if Ubuntu needs to install Oracle, the system itself needs to do a lot of camouflage, so I'm only going to