oracle pl sql questions

High-performance PL/SQLAssuming the code meets functional requirements, PL/SQL code needs to meet 3 conditions to become efficient:1. Performance: The operating time is within an acceptable range.2. Impact: It does not disrupt (or weaken in some unacceptable way) any other component of your system.3. Provable: You can prove that, under all reasonable conditions,

Oracle | PL/SQL Check constraints usage 1. Objectives The instance explains how to use CHECK constraints (create, enable, disable, and delete) in Oracle) 2. What are Check constraints? The CHECK constraint adds additional constraints to the columns of the table. Note: CHECK constraints cannot be defined in VIEW.Only th

First, the problem descriptionThe oracle-client side is not installed locally, and because of limited machine resources, you want to connect to the remote database via PL/SQL developer. Simple installation PL/SQL developer cannot connect to the database remotely.Second, the

Tags: log cheng Baidu Oracle. com targe install Oracle detail getThe simple way to connect a remote database via PL/SQL is to install the Oracle client, and one way is to not install the client, but you need to create the necessary configuration files yourself, the following

= sid_ DESC = (sid_name = ORCL) (Oracle_ HOME =/opt/oracle/product/11gr2)) LISTENER = (description_list = (DESCRIPTION = (A ddress = (PROTOCOL = TCP) (HOST = 192.168 . ) (PORT = 1521 ))) Adr_base_ LISTENER =/opt/oracle This file changed, and the Tnsnames.ora file in localhost changed to local IP, I do not know whether this has played a role, anyway changed is also true# Tnsnames.ora Network Confi

Oracle is the name of the manufacturer and the name of the database product. such as Sybase's Sybase database. and Microsoft's database product is called SQL Server.PL/SQL is the name of an Oracle database that is used by the language. Microsoft's SQL Server is called T, you

to call the package process or functionWhen calling the package's procedure or function, you need to have the package name before the procedure and function, and if you want to access packages for other scenarios, add the scheme name before the package name. Such as: --Call the stored proceduresql> exec sp_package.update_sal (' SCOTT ', 8888);--Call functionvar income number;Call Sp_package. Annual_income (' SCOTT ') into:income;Print income; Special Note: The package is a very important part o

Oracle PL/SQL Composite data types Composite data types can be roughly divided into two types. The first type is record type, which is suitable for processing single row and multiple columns of data, a bit similar to VO in java; the first type is set type, suitable for processing Single Column and multiple rows of data, similar to List in java, the following expe

PL/SQL table (Oracle memory table) --- table () function usage = ================================ Author: zhouwf0726 (http://zhouwf0726.itpub.net) Posted: Category: Oracle Development Source: http://zhouwf0726.itpub.net/post/9689/195237 ---------------------------------------------------------------

variable is automatically minus 1 using the keyword REVERSE. The numbers following the in REVERSE must be in order from small to large, and must be integers, not variables or expressions . You can use exit to exit the loop. Example 5. BEGIN for int inch 1.. ten loops dbms_output. Put_Line ("| | int ); END LOOP;End Example 6. CREATE TABLETemp_table (Num_col Number); DECLAREV_counter Number:= Ten; BEGIN INSERT intoTemp_table (Num_col)VALUES(V_counter); forV_counterinch -.. -LOOPINSERT into

1. Download InstantClientOracle official website address: www. oracle. comtechnetworkdatabasefeaturesinstant-clientindex-097480.ht 1. Download Instant Client Oracle official website address: http://www.oracle.com/technetwork/database/features/instant-client/index-097480.ht 1. Download the Instant Client Oracle official website address: The downloaded file is

I have just joined a new project recently. The requirements have been completed and will enter the detailed design stage. The project framework should use a multi-project system framework that is being developed by other project teams and use this main framework to develop modules of our own system. I have learned about the composition of this framework over the past few days, mainly uses the WCF Service, entityframework 4.1 Framework, and ext. NET component development, by the way, I learned EF

Looking at the fat Oracle client on my computer, I almost never used anything like the Enterprise Manage Console. Its existence is a waste of my computer space. So I checked on the Internet to see if I could unmount the ORACLE client and use PL/SQL normally. It turns out that this method is available (I did my research

Tags: des using os io file data ar ArtPL/SQL Connect Oracle Database 1, Brief introductionUse PL/SQL to connect to a remote Oracle database without installing an Oracle database.2. Detailed steps:A) Install

Label:PL SQL Cursors Hrno records in the Hregright table that do not exist are populated with the Hrno in the House table (house only) Declare cursorHouse_cur is SelectH.regno,h.hrno fromHouse HwhereH.hrno is not NULL Group byH.regno,h.hrno having Count(H.regno)=1; begin forHouseinchHouse_cur LoopUpdateHregright RSetR.hrno=House.hrnowhereR.regno=House.regno andR.hrno is NULL; EndLoop; End; PL