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Post from: http://www.oracle.com/global/cn/oramag/oracle/04-sep/o54plsql.html Control mythical codeAuthor: Steven Feuerstein Study and crack some myths in your code. "Do not use the XYZ feature; there was a problem in previous versions of N. N. "" To always use explicit pointers, this is the most effective way to extract a single row of data. " "To avoid using packages, they consume too much memory. " MeYou must have heard of these arguments, or either of them. They are just a few myths tha

This example describes Oracle's pl/sql. Share to everyone for your reference, specific as follows: First, what is Pl/sql? Pl/sql (procedural language/sql) is an extension of Oracle's standard SQL language. Pl/sql not only allows you to embed SQL languages, you can also define variables and constants, allow you to us

efficiency of SQL statement execution, analyze the structure of the table, so as to provide a visual basis for SQL tuning; 4, Automatic replacement: Fast input SQL statements, such as input s, press the space, automatically replaced by select; for example, enter SF, press space, automatically replaced by select * from, very convenient, save a lot of time to write duplicate SQL statements. Setup method: Menu Tools–>preferences–>editor–>autoreplace (auto-replace) –>edit 1), create a text file Sho

Structure:2.oracle instance:Background process:Memory Structure:system Global Area (SGA):Shared AreaProgram Global Zone (PGA):This system diagram is very important to hear, many companies interview request handwriting this figureInstallation of the 3.pl/sql toolThe first installation did not succeed, under the CSDN resources, now think of it should be tnsnames.ora there is a Sqlnet.ora two files are not configured, resulting in the connection when th

Tags: PL sql Oracle1, PL /SQL Developer Remember login password when using PL/SQL developer, you want PL/ SQL Developer to remember the username and password to log in to Oracle for your convenience; Setup method: PL /SQL Developer 7.1.2->tools->preferences->oracle->l

Basic PL/SQL settings 1. How to export table creation statements in batches? Select [Tools]-> [Export User Objects...] from the menu, and select the table to be exported in the window that appears. The SQL script exported in this way does not contain insert statements, that is, the data in the table is not exported at the same time, only DDL statements. 2. How to export initialization data? Select [Tools]-> [Export Tables...] from the menu, in the dis

1. PL/SQL developer remember the Login PasswordWhen PL/SQL developer is used, PL/SQL developer needs to remember the username and password for logging on to Oracle for ease of work; Setting Method: PL/SQL 7.1.2-> Tools-> preferences-> Oracle-> logon history. "store history" is selected by default. Check "store with p

1. PL/SQL developer remember the login password. When PL/SQL developer is used, PL/SQL developer wants to remember the login username and password for Oracle for ease of work. Setting method: PL/SQL developer 7.1.2-> Tools-> preferences-> Oracle-> logon history. The "store history" option is selected by default. Check

Basic concepts of PL/SQL 1. PL/SQLOverview PL/SQL is Oracle's procedural extension to industry-standard SQL. PL/SQL naturally, efficiently, and safely extends SQL. its primary strength is in providing a server-side, stored Procedural language that is easy-to-use, seamless with SQL, robust, portable, and secure.

PL/SQL processing exceptions are different from otherProgramLanguage error management method. The PL/SQL exception handling mechanism is very similar to Ada, and there is a full-Inclusion Method for handling errors. When an error occurs, the program unconditionally redirects to the exception handling section, which requiresCodeIt should be very clean and separate the error handling part from the other part

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 ease of work; Setting Method: PL/SQL Developer 7.1.2-> tools-> Preferences-> Oracle-> Logon History. "Store history" is selected by default. Check "Sto

Inaccurate analysis and avoidance methods 1 Case visits Hardware environment: IBM xseries 3650 Operating system: WINDOWS2003 Standard Version +SP02 Database version: Oracle9.2.0.1 Pl/sql Developer Version: 7.0.2.1076 As a result of business needs, first drop a partition table t_sms, and then rebuild this table, request table structure, index and so on exactly the same. But at that time the opening version was not found, so decided to use the

Tags: security numerical environment client standard technology share Web creation process Evel I. What is PL/SQL?PL/SQL (procedural language/sql) is an extension of Oracle in the standard SQL language.PL/SQL not only allows the embedding of the language, but also defines variables and constants, allows the use of conditional and circular statements, and allows the use of exceptions to handle various errors

In general PL/SQL programming, SQL can be used directly in DML and transaction-controlled statements, but DDL statements and system control statements cannot be used directly in PL/SQL, and it is possible to implement DDL statements and system control statements in PL/SQL by using dynamic SQL.First, we should understand what dynamic SQL is, and the SQL we use in

Tags: style http color os using Java AR Data code1. What is PL/SQL?PL/SQLIt is also a programming language called the Process SQL language (procedural language/sql). PL/SQLis aOracle DatabaseAn extension to the SQL statement. Added to the use of ordinary SQL statementsProgramming languagesthe characteristics, soPL/SQLThe data operation and query statements are or

First, why is it more efficient to combine SQL statements into a PL/SQL statement block?It is more efficient to use SQL statements in a PL-SQL statement block, mainly because doing so can significantly reduce network traffic and the application becomes more efficient.When a client computer issues an SQL statement, the server's database processes the request and returns the result set to the client. Therefor

The ORACLE tutorial is: PL/SQL programming experience summary Developer Network Oracle. I usually encounter some problems in PL/SQL programming. I will summarize them in the form of Q A for you to share.1. Can pipelines be used to improve processing efficiency when you need to load a large amount of data streams to a table or process a large amount of data streams?MPs queue functions are very convenient fo

Difference between % TYPE and % ROWTYPE in PL/SQL, % type % rowtype % TYPE: Defines a variable. Its data type is the same as that of a defined data variable or the data type of a column in a database table.In this case, % TYPE can be used.The advantages of using the % TYPE feature are: 1. You do not need to know the Data Type of the referenced database column;2. The data type of the referenced database column can be changed in real time. Declare -- D

Multiple unrelated columns are combined to form a PL/SQL record type, which can be processed as a whole. In addition, PL/SQL record types can be performedNesting and defining Union arrays and nested tables based on PL/SQL records. This article first reviews several declarations of PL/SQL records. Next, it mainly descri

11.1.10 64-bit Navicat Premium is a set of database management tools that can be easily connected to MySQL, MariaDB, SQL Server, SQLite, Oracle, and PostgreSQL databases in a single program. The official website is: Http://www.navicat.com.cn/products/navicat-premium. Since this machine is a 64-bit operating system, download the latest 11.1.10 64-bit version. 3, Pl\sql Developer 10.0.5.1710 PL/SQL Developer