Final answer:
The question involves comparing static SQL, which uses predefined queries, to dynamic SQL, where queries are constructed and executed at runtime. Static SQL is characterized by security and efficiency, while dynamic SQL provides flexibility and accommodates variable input.
Step-by-step explanation:
The question you are asking about pertains to the relationships between different types of SQL execution methods: static SQL and dynamic SQL. Static SQL is compiled and optimized at the time of application development. This means that the database structures and statements are predefined and do not change at runtime. Static SQL is known for being secure and efficient since the database can optimize the queries in advance.
On the other hand, dynamic SQL allows for SQL statements to be constructed and executed at runtime. This method is flexible and allows for the construction of queries based on variable input, which is helpful when the exact database operations cannot be determined until the application is running. The EXECUTE IMMEDIATE command is often used with dynamic SQL to run these statements without prior preparation.
To summarize, the two relationships mentioned—'Static SQL execute immediate DDL and DML' and 'Vars, prepare, execute DDL DML'—could be interpreted as aspects of dynamic SQL, where you compose queries on the fly and then execute them, and aspects of static SQL, where queries are prepared and executed with predefined structure.