triggers in pl sql

total execution time of all units. When switching to the Unit module, the total execution time of the Unit module is Unit -- unit name, that is, the stored procedure of execution, including the calling process and anonymous block.Line -- code line numberTotal time -- the execution time of the line of code (the color length represents the percentage of the execution time of the line of code and the maximum code execution time)Occurrences-number of executions of this rowText-the corresponding lin

fromEmpwhereEmpno=N; Dbms_output.put_line ('Employee name is:'||v_ename); Dbms_output.put_line ('Employee Sal is:'||v_sal); Exception whenNo_data_found ThenDbms_output.put_line ('Please input current number!'); End;6. With%type, ensure that the data type of the variable is consistent with the data type of the field in the table:Declarev_ename Emp.ename%type;v_sal emp.sal%type;begin SelectEname,sal intoV_ename,v_sal fromEmpwhereEmpno=N; Dbms_output.put_line ('Employee name is:'||v_ename); Dbms

SQL Server uses triggers to capture the session information of DML operations [instance] and triggers dml Background When we met such a requirement last week, the maintenance personnel found that the data of a table was often modified due to historical reasons, lack of documents, and frequent changes of maintenance personnel, as a result, they are not completely

of conditional branch statements and cyclic statements, multiple applications can share their solutions.1.2.4 Modularization The PL/SQL program structure is a descriptive and well-defined block structure and nested block structure. It is divided into separate processes, functions, and triggers and can be combined into packages, improve the modularization of the

program block: PROCEDURE name [(Parameter[,parameter,...])] Is [Local declarations] BEGIN Execute statements [EXCEPTION Exception handlers] End [name] Package (Package) A package is actually a collection of related objects that are grouped together, and when any function or stored procedure in a package is invoked, the package is loaded into memory, and the access speed of any function or stored procedure in the package is greatly accelerated. The package consists of two parts: the specifi

(Han shunping) pl/SQL programming (2), shunping plI. pl/SQL advanced-control structurePl/SQL provides three conditional branch statements: if -- then, if -- then --- else, if --- then --- elsif --- else(1) simple condition judgment if-thenQuestion: When writing a process, yo

intoScoreValues(3,'3-105', -)Insert intoScoreValues(4,'3-105', -)Insert intoScoreValues(5,'3-105', -)Insert intoScoreValues(6,'3-105', -)--Business: To ensure the complete implementation of the entire process, all without problems, unified submission, once there is a problem, back to the origin. Like bank transfers.Begin Tran--z The start of the transaction--start writing the process statement--After the statement is finishedIf @ @ERROR >0Rollback tran--ROLLBACK TRANSACTIONElseCommit Tran--

/SQL program design, including basic grammar, control structure, cursor, exception handling, etc. the most practical development techniques for PL/SQL programs are introduced, including subroutines, packages, triggers, dynamic SQL, batch bindings, subroutine dependencies, et

PL/SQL is a block-structured language in which a PL/SQL program contains one or more logical blocks in which variables can be declared and variables must be declared before they are used. In addition to the normal execution procedures, PL/

Label:Run in Query Analyzer: Use database nameGoSelect * from sysobjects where xtype=' TR 'sysobjects holds the object of the database, where the record xtype as TR is the trigger object. We can see the name of the trigger in the Name column. SQL triggers-Create a simple trigger SQL triggers-rename

PL/SQL statement beautification click No response. View the following prompts PL/SQL Beautifier could not parse text. I am this time due to the SQL statement syntax error.At the toolbar (if you don't have this button, right-click----Customize----Edit)PLD 6 or later has the a

allows you to work within a specific set of entries, rather than within a full database or architecture. In this way, if you need to compile all the project entries or move the project from a location or database to another location, the search for the required project entries becomes easier,To-Do entry-you can use the to-do entry in any SQL or PL/SQL source fil

[Name] 　　Packages (Package)A package is actually a collection of related objects that are grouped together, and when any function or stored procedure in the package is called, the package is loaded into memory, and the subroutine of any function or stored procedure in the package is accessed much faster.The package consists of two parts: a specification and a package body (body), a specification describing variables, constants, cursors, and subroutines, and a package body that fully