Text adoption mail is often included in the term direct response mail, but by its very nature and objectives it really should be in a category of its own. With this type of mailing the publisher expects to receive exam copy requests and future orders for classroom use.
The PL/SQL WHILE Loop. The WHILE loop, also called a conditional loop, evaluates a condition before each loop executes, and if false, the loop is terminated. If the expression is false when the program reaches the WHILE loop, the loop code is jumped and never executed.Use a WHILE loop when the condition test is required at the start of the loop. The next example contains three WHILE loops.The last loop will never execute because the condition will never be true. The middle loop uses multiple condition tests, using the AND key word.se a WHILE loop when the condition test is required at the start of the loop. The next example contains three WHILE loops. The last loop will never execute because the condition will never be true. The middle loop uses multiple condition tests, using the AND key word.
In addition, inside the loop you have to update some variables to make the condition becomes to FALSE or NULL at some points to terminate the loop, otherwise, you will have an endless loop, which causes a stack overflow error. The PL/SQL WHILE loop is effective when you donât know how many times the loop will execute. If the number of iterations is predetermined, you should use the PL/SQL FOR loop statement instead. PL/SQL WHILE LOOP example. How it works. First, we initialize the counter to 10 and factorial to 1.