They are data structures that hold all the results of a query. The following example shows the usage of DELETE query in a COBOL program −Ĭursors are used to handle multiple row selections at a time. UPDATE STUDENT SET STUDENT-ADDRESS=:WS-STUDENT-ADDRESS
PROGRAMMIER KURS UPDATE
The following example shows the usage of UPDATE query in a COBOL program − VALUES (:WS-STUDENT-ID, :WS-STUDENT-NAME, WS-STUDENT-ADDRESS) INSERT INTO STUDENT(STUDENT-ID, STUDENT-NAME, STUDENT-ADDRESS) MOVE 'TutorialsPoint' TO WS-STUDENT-NAME. The following example shows the usage of INSERT query in a COBOL program − When you compile and execute the above program, it produces the following result − SAMPLE JOB(TESTJCL,XXXXXX),CLASS = A,MSGCLASS = C INTO :WS-STUDENT-ID, :WS-STUDENT-NAME, WS-STUDENT-ADDRESS FROM STUDENT SELECT STUDENT-ID, STUDENT-NAME, STUDENT-ADDRESS The following example shows the usage of SELECT query in a COBOL program − The STUDENT table contains the following data − Let’s assume we have one table named as 'Student' that contains Student-Id, Student-Name, and Student-Address. Syntaxįollowing is the syntax to declare an SQLCA in the Working-Storage section − The value '000' in SQLCODE states a successful execution. There are a number of predefined variables under SQLCA like SQLCODE which contains the error code. It tells the program whether an execution was successful or not. SQLCA is a SQL communication area through which DB2 passes the feedback of SQL execution to the program. Syntaxįollowing is the syntax to declare host variables and include tables in the Working-Storage section − Using host variables with SQL statements, prefix them with a colon (:). Host variables cannot be group items, but they may be grouped together in host structure. They are declared in the Working-Storage Section. Host variables must be declared for all values that are to be passed between the program and the DB2. Host variables are used for receiving data from a table or inserting data in a table. This is done by using the INCLUDE statement.Īll SQL statements other than INCLUDE and DECLARE TABLE must appear in the Procedure Division. DB2 Application Programmingįollowing are rules to be followed while coding a COBOL-DB2 program −Īll the SQL statements must be delimited between EXEC SQL and ENDEXEC.Īll the tables that are used in a program must be declared in the WorkingStorage Section. An additional INTO clause is placed in the SELECT statement. For example, the output of a query is directed to a predefined set of variables which are referred as Host Variables. COBOL-DB2 applications are those applications that include both COBOL and DB2.Įmbedded SQL statements work like normal SQL statements with some minor changes. Embedded SQL statements are preprocessed by the SQL processor before the application program is compiled. It involves the following terms −Įmbedded SQL statements are used in COBOL programs to perform standard SQL operations. Now, we will discuss how a COBOL program interacts with DB2.
PROGRAMMIER KURS PROFESSIONAL
Read more about the robust support structure for teachers in our Professional Learning program on the Professional Learning page.As of now, we have learnt the use of files in COBOL. Optional professional learning: Our year-long program is intended to support both teachers experienced with curriculum and tools and teachers who are new to.Teachers who are able to independently write and debug an error-free function (or procedure) with one or more parameters and that uses conditional logic, loops, and an array (or a list) will be best positioned to use our CSA curriculum with students. Prior knowledge: For students, Computer Science Principles, Computer Science Discoveries, and/or a similar introductory computer science course.Contains 9 units, which includes an AP Exam Prep unit. Curriculum length: A minimum of 140 class hours should be taught as a full-year course.Audience: High school students, grades 9 - 12.Computer Science A invites students to learn programming using Java and can be taken after completing an introductory course such as Computer Science Principles or Computer Science Discoveries.
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