Answers to Chapter 14
 | Reviewing It |
| 1: | What is an explain plan? |
| A1: | The explain plan illustrates the execution plan for any SQL statement. It shows the tables and indexes Oracle will use when processing a SQL statement, as well as the order in which the tables and indexes will be used |
| 2: | What is the main difference between the cost-based optimizer and the rule-based optimizer? |
| A2: | The Cost-based optimizer makes its decisions based on pre-collected statistics where the rule-based uses a set of 19 rules |
| 3: | What is a driving table? |
| A3: | The driving table is the table that is accessed first and then used to look up information in the other tables in the ... |
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