pl sql for dummies

1. First talk about the difference between pl/SQL and SQL * plus. For example, it is easy to understand: Pl/SQL-> C ++ LanguageSQL * plus-> Microsoft Visual C ++ 6.0 Compiler Pl/SQL is

Tags: col program configuration SQL query field positioning Rod AC MVCThese days encountered two problems, are very wonderful, distressed for three days, the final positioning out.Problem one, inserting data through PL/SQL developer to a remote Oracle database server, querying data through PL/

In fact, this is also a problem at work. To tell the truth, I am not willing to do it myself. I also want to write statements for queries, but I have not thoroughly studied this kind of information,Write SQL statements in JavaProgramAt the same time, I chose to be lazy. First, if it is golden, of course there is no need to say that the Direct Write statement is similar to select. If it is PL/

Using PL/SQL profiler to locate PL/SQL bottleneck code for SQL optimization, you can use SQL tuning advisor to achieve automatic SQL optimization and adjustment. For

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

Working with Dates in PL/SQL (date used in PL/SQL) The previous articles in this introductory PL/SQL series focused on working with strings and numbers in PL/

Working with Numbers in PL/SQL (use numbers in PL/SQL) This article gives you all the information you need in order to begin working with Numbers in your PL/SQL programs. numbers in PL/

PL-SQL package creation and application, pl-SQL CreationZookeeper Creating and applying PL-SQL packages ① IntroductionA package is a combination of PL/

1. The various parts of the sub-program:Declaration section, executable part, exception handling section (optional)2. Sub-Program classification:A. Procedures-performing certain operationsA. Syntax for creating a procedure:CREATE [OR REPLACE] PROCEDURE BEGIN[EXCEPTIONEND;B. Three modes of process parameters:In: Used to accept the value of the calling program, the default parameter modeOut: Used to return a value to the calling programIn out: Used to accept the value of the calling program and re

PL/SQL program control structure and change data and manage transactions in PL/SQL, plsql1. condition Control A. IF condition branch Syntax: If (condition 1) then Statement; Elsif (condition 2) then Statement; Elsif (Condition 3) then Statement; Else Statement; End if; B. case condition branch: equivalent comparison, c

................................................................................................ END LOOP; D. Nesting loops and Labels: defining labels: 3. Sequential controlA.goto statement: Used to jump to a specified The disadvantage is that it increases the complexity of the program and reduces readability, so Oracle does not recommend using it for the day. B. NULL statement: Empty statement, do not have any actual effect, usually occupy position with 4. Exception Handling A. There are two

This article gives you all the information you need in order to begin working with numbers in your PL/SQL programs.Numbers in PL/SQL PL/SQL offers a variety of numeric datatypes to suit different purposes: Number. A true decimal

PL/SQL language development Reference Manual II: PL/SQL program structure PL/SQL language development Reference Manual1,PL/SQL Block1) Decla

1. Traditional layer by layer data, and Plsql as a separate unit to return to the client, reduce the query, reduce the network transmission of the round trip, funny2.pl/sql statement blocks are divided into two types: naming (subroutines, functions, packages that exist in the database, and later can be referenced by name), AnonymousDifference: A named statement block is stored in a database, referenced by a

PL/SQL language development Reference Manual: PL/SQL cursor PL/SQL language development Reference Manual1. cursor)The cursor is the data extracted from the data table. It is stored in the memory as a temporary table. There is a da

Label:Control statements are fundamental to any language, to any programmer. Learn PL/SQL, only to realize the simplicity of Java grammar, it is not an era of things, of course, their positioning is not the same, not in their own longer than the short of others. --The 4th chapter begins--code 4.1 The simplest if statement uses example DECLARE v_count number (10): = 0; --Define the counter variable V_empno

1) classification of Sets Oracle supports three types of collections: Associative array (Index-by table) Nested table) Variable-length array (VARRAY) One of their differences is that the Nested table and VARRY can be used either in PL/SQL or directly in the database, but the Associative array doesn't work, that is, associative array cannot be created separately using the create type statement. It can only b

For SQL optimization, you can use SQL tuning advisor to achieve automatic SQL optimization and adjustment. For PL/SQL code, there are both SQL code and PL/

v_job= ' salesman ' then UPDATE scott.emp SET sal=sal* (1+c_salesman) WHERE empno=empno1; elsif v_job= ' MANAGER ' then UPDATE scott.emp SET sal=sal* (1+c_manager) WHERE empno=empno1; elsif v_job= ' SR.CONT ' then UPDATE scott.emp SET sal=sal* (1+c_sr_cont) WHERE empno=empno1; END IF; --Displays completion information dbms_output. Put_Line (' already for employees ' | | empno1| | ' A successful raise! '); EXCEPTION-handling of PL/

PLSQLPL/SQL developer is an Oracle Database DeveloperProgramIntegrated Unit Development Environment (IDE). With PL/SQL developer, you can easily create the server part of your client/server application. So far, you can do the following in the worst case:• Use a text editor to Write Program units (processes, triggers, and so on ).• Use Oracle