oracle database 12c pl sql programming

cursorLoopFetch c_emp into v_id,v_name; //Fetch data from the cursorExit when C_emp%notfound;End Loop;Close c_emp; //Close Cursors/* Exception handling section, start with exception */exceptionWhen No_data_found ThenDbms_output. Put_Line (' no data ');2. Control structureThere are three program structures in the PL/SQL program segment: conditional structure, loop structure, and sequential str

A stored procedure is a named PL/SQL program block that can be given parameters, stored in a database, and can be called by a user. Since the stored procedure is compiled code, it is not necessary to compile again at the time of the call, which improves the running efficiency of the program. In addition, the use of stored procedures can implement modular design o

Tags: Else data number nbsp TNO SQL structure OOP const classification1. What is PL/SQL PL/SQL is an extended language that combines the Oracle process language with the Structured Query language. is a block-structured language. T

For PL/SQL connection, 64-bit Oracle has recently changed to 64-bit Win7, and oracle has also changed to 64-bit 11g. After the change, we found that the plsql cannot load the database at all. There are also various changes to version Shenma on the Internet. I don't want to c

typeSyntax:Identifier [constant] datatype [not null] [: = | default expr]Identifier: Specifies the variable or constant name.Constant: a constant.Datatype: used to specify the type of a variable or constantNot NULL: non-null. It must be initialized.:=: The value assignment matchesDefault: Default ValueExpr: Initial Value 1.3. scalar definition rulesDeclare a variable per lineVariable Value assignment: identifier: = value;Variable names can contain up to 30 characters 1.4 Use the % Type attribut

Because of the reasons for the project need to use the Oracle database, due to time constraints can not learn from the foundation, and the Oracle operation of the command interface is too unfriendly, so I found Pl/sql developer this very useful software to indirectly use the

procedurepro_caseexception (Employnumnumber) isv_salemp.sal%type;begin selectsalintov_salfromempwhereempno= employnum;casewhenv_salB. custom exceptions : There is no association with Oracle's errors, it is an exception defined by the developer for a specific situation. /* Custom exception: */create or replace procedure test_modifiedexception (Employeeno number) is--Define an exception Myex Exception;begin updateEMP Set sal = sal + empno = Employeeno;--s