crystal reports barcode not working ORAC LE DATABA SE 11G S QL A ND PL/SQL: A BRIEF PRIMER in Font

Creator Code 3 of 9 in Font ORAC LE DATABA SE 11G S QL A ND PL/SQL: A BRIEF PRIMER

APPENDIX ORAC LE DATABA SE 11G S QL A ND PL/SQL: A BRIEF PRIMER
Code 39 Full ASCII Encoder In None
Using Barcode drawer for Font Control to generate, create Code 3/9 image in Font applications.
www.OnBarcode.com
Barcode Creator In None
Using Barcode generator for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
Here are some common PL/SQL variable declarations: hired_date emp_name DATE; VARCHAR2(30);
PDF417 Maker In None
Using Barcode generation for Font Control to generate, create PDF-417 2d barcode image in Font applications.
www.OnBarcode.com
Create QR Code In None
Using Barcode printer for Font Control to generate, create QR Code 2d barcode image in Font applications.
www.OnBarcode.com
In addition to declaring variables, you can also declare constants, as shown in the following example: tax_rate constant number := 0.08;
Printing EAN-13 In None
Using Barcode generation for Font Control to generate, create EAN / UCC - 13 image in Font applications.
www.OnBarcode.com
Code 3/9 Generation In None
Using Barcode creator for Font Control to generate, create Code 3/9 image in Font applications.
www.OnBarcode.com
You can also use the %TYPE attribute to declare a variable that is of the same type as a specified table s column, as shown here: emp_num employee.emp_id%TYPE;
Data Matrix 2d Barcode Generation In None
Using Barcode encoder for Font Control to generate, create ECC200 image in Font applications.
www.OnBarcode.com
USPS PLANET Barcode Encoder In None
Using Barcode creator for Font Control to generate, create USPS PLANET Barcode image in Font applications.
www.OnBarcode.com
The %ROWTYPE attribute specifies that the record (row) is of the same data type as a database table. In the following example, the DeptRecord record has all the columns contained in the department table, with identical data types and length: declare v_DeptRecord department%ROWTYPE;
Code 39 Full ASCII Creator In None
Using Barcode encoder for Online Control to generate, create Code 39 image in Online applications.
www.OnBarcode.com
Generating Code 3/9 In Objective-C
Using Barcode generator for iPad Control to generate, create Code 39 Full ASCII image in iPad applications.
www.OnBarcode.com
Writing Executable Statements
Make Data Matrix In Visual Studio .NET
Using Barcode generation for Visual Studio .NET Control to generate, create Data Matrix 2d barcode image in Visual Studio .NET applications.
www.OnBarcode.com
GS1 - 13 Generation In Visual Basic .NET
Using Barcode generation for .NET Control to generate, create European Article Number 13 image in .NET applications.
www.OnBarcode.com
After the BEGIN statement, you can enter all your SQL statements. These look just like your regular SQL statements, but notice the difference in how you handle a SELECT statement and an INSERT statement in the following sections.
Print ECC200 In Java
Using Barcode maker for Java Control to generate, create Data Matrix 2d barcode image in Java applications.
www.OnBarcode.com
ANSI/AIM Code 39 Drawer In Objective-C
Using Barcode creator for iPhone Control to generate, create Code 39 Full ASCII image in iPhone applications.
www.OnBarcode.com
A SELECT Statement in PL/SQL
Reading QR-Code In Visual Basic .NET
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Encoding GTIN - 128 In Objective-C
Using Barcode generator for iPhone Control to generate, create UCC - 12 image in iPhone applications.
www.OnBarcode.com
When you use a SELECT statement in PL/SQL, you need to store the retrieved values in variables, as shown here: DECLARE name VARCHAR2(30); BEGIN SELECT employee_name INTO name FROM employees WHERE emp_id=99999; END; /
Reading Data Matrix 2d Barcode In C#.NET
Using Barcode decoder for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Printing DataMatrix In VB.NET
Using Barcode encoder for Visual Studio .NET Control to generate, create ECC200 image in VS .NET applications.
www.OnBarcode.com
DML Statements in PL/SQL
Matrix 2D Barcode Maker In Java
Using Barcode encoder for Java Control to generate, create Matrix Barcode image in Java applications.
www.OnBarcode.com
Create QR Code In C#.NET
Using Barcode drawer for Visual Studio .NET Control to generate, create QR Code image in VS .NET applications.
www.OnBarcode.com
Any INSERT, DELETE, or UPDATE statements in PL/SQL work just as they do in regular SQL. You can use the COMMIT statement after any such operation, as shown here: BEGIN DELETE FROM employee WHERE emp_id = 99999; COMMIT; END; /
Handling Errors
In PL/SQL, an error or a warning is called an exception. PL/SQL has some internally defined errors, and you can also define your own error conditions. When any error occurs, an exception is raised
A PPEN DI X O RA CLE D AT A BASE 11G S Q L AND PL/S QL: A BRI EF PRIME R
and program control is handed to the exception-handling section of the PL/SQL program. If you define your own error conditions, you have to raise exceptions by using a special RAISE statement. The following example shows an exception handler using the RAISE statement: DECLARE acct_type INTEGER := 7; BEGIN IF acct_type NOT IN (1, 2, 3) THEN RAISE INVALID_NUMBER; -- raise predefined exception END IF; EXCEPTION WHEN INVALID_NUMBER THEN ROLLBACK; END; /
PL/SQL Control Structures
PL/SQL offers you several types of control structures, which enable you to perform iterations of code or conditional execution of certain statements. The various types of control structures in PL/SQL are covered in the following sections.
Conditional Control
The main type of conditional control structure in PL/SQL is the IF statement, which enables conditional execution of statements. You can use the IF statement in three forms: IF-THEN, IF-THEN-ELSE, and IF-THEN-ELSEIF. Here s an example of a simple IF-THEN-ELSEIF statement: BEGIN . . . IF total_sales > 100000 THEN bonus := 5000; ELSEIF total_sales > 35000 THEN bonus := 500; ELSE bonus := 0; END IF; INSERT INTO new_payroll VALUES (emp_id, bonus . . .); END; /
PL/SQL Looping Constructs
PL/SQL loops provide a way to perform iterations of code for a specified number of times or until a certain condition is true or false. The following sections cover the basic types of looping constructs.
The Simple Loop
The simple loop construct encloses a set of SQL statements between the keywords LOOP and END LOOP. The EXIT statement ends the loop. You use the simple loop construct when you don t know how many times the loop should execute. The logic inside the LOOP and END LOOP statements decides when the loop is terminated.
APPENDIX ORAC LE DATABA SE 11G S QL A ND PL/SQL: A BRIEF PRIMER
In the following example, the loop will be executed until a quality grade of 6 is reached: LOOP . . . if quality_grade > 5 . . . EXIT; end if; END LOOP;
then
Another simple loop type is the LOOP . . . EXIT . . . WHEN construct, which controls the duration of the loop with a WHEN statement. A condition is specified for the WHEN statement, and when this condition becomes true, the loop will terminate. Here s a simple example: DECLARE count_num NUMBER(6); BEGIN count_num := 1; LOOP dbms_output.put_line(' This is the current count count_num := count_num + 1; Exit when count_num > 100; END LOOP; END;
'|| count_num);
Copyright © OnBarcode.com . All rights reserved.