By Karl Giberson And Mariano Artigas
Read or Download Oracle Forms Developer - The Complete Video Course [VHS] PDF
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This e-book is a short reference for the SQL dialect supported by means of the Teradata Relational Database administration approach. The e-book is additionally a brief connection with the supported info description words for the Teradata RDBMS and the knowledge Dictionary. The viewers for this quickly reference is all clients of Teradata SQL who desire fast, non-detailed information regarding how one can constitution a SQL assertion.
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Additional resources for Oracle Forms Developer - The Complete Video Course [VHS]
PL/SQL identifiers are covered in detail throughout this book. FOR EXAMPLE DECLARE v_first_name VARCHAR2(35); v_last_name VARCHAR2(35); c_counter CONSTANT NUMBER := 0; This example shows a declaration section of an anonymous PL/SQL block. It begins with the keyword DECLARE and contains two variable declarations and one constant declaration. The names of the variables, v_first_name and v_last_name, are followed by their datatypes and sizes. The name of the constant, c_counter, is followed by the keyword CONSTANT, its datatype, and a value assigned to it.
ANSWER: A program cannot depend wholly on a user to provide text information in single quotes. Enclosing a substitution variable in single quotes helps a program be less error-prone. PUT_LINE Statement In this exercise, you determine the day of the week based on today’s date. You then display the results on the screen. 2 Exercises 18 Execute the script, and then answer the following questions: A) What is printed on the screen? ANSWER: The output should look like the following: Today is Friday PL/SQL procedure successfully completed.
The value of v_day is computed with the help of the TO_CHAR and SYSDATE functions. PUT_ LINE statement. B) What is printed on the screen if the statement SET SERVEROUTPUT OFF is issued? Why? ANSWER: If the statement SET SERVEROUTPUT OFF is issued prior to the execution of the PL/SQL block, no output is printed on the screen. The output looks like the following: PL/SQL procedure successfully completed. DID YOU KNOW? When substitution variables are used, the user is prompted to enter the value for the variable regardless of the SERVEROUTPUT setting.