Oracle C++ Call Interface Programmer's Guide

Standard Statements
Types of SQL Statements in the OCCI Environment
Previous sections describe examples of both DDL and DML commands. For
example:
stmt->executeUpdate(“CREATE TABLE basket_tab
(fruit VARCHAR2(30), quantity NUMBER)”);
and
Parameterized Statements
stmt->executeUpdate(“INSERT INTO basket_tab
VALUES(‘MANGOES’, 3)”);
These are each an example of a standard statement in which you explicitly define
the values of the statement. So, in these examples, the CREATE TABLE statement
specifies the name of the table (basket_tab), and the INSERT statement stipulates
the values to be inserted (‘MANGOES’, 3).
You can execute the same statement with different parameters by setting
placeholders for the input variables of the statement. These statements are referred
to as parameterized statements because they are able to accept input from a user or
program by using parameters.
For example, suppose you want to execute an INSERT statement with different
parameters. You first specify the statement by the setSQL method of the
Statement handle:
stmt->setSQL(“INSERT INTO basket_tab VALUES(:1, :2)”);
You then call the setxxx methods to specify the parameters, where xxx stands for
the type of the parameter. The following example invokes the setString and
setInt methods to input the values of these types into the first and second
parameters.
To insert a row:
stmt->setString(1, “Bananas”); // value for first parameter
stmt->setInt(2, 5); // value for second parameter
Having specified the parameters, you insert values into the row:
Relational Programming 2-9