October 2002
Beginner
864 pages
18h 41m
English
Content preview from Sams Teach Yourself SQL in 21 Days, Fourth Edition
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Day 16
Quiz
| 1: | What does it mean to streamline a SQL statement? |
| A1: | Streamlining a SQL statement is taking the path with the least resistance by carefully planning your statement and arranging the elements within your clauses properly. |
| 2: | Should tables and their corresponding indexes reside on the same disk? |
| A2: | Absolutely not. If possible, always store tables and indexes separately to avoid disk contention. |
| 3: | Why is the arrangement of conditions in a SQL statement important? |
| A3: | For more efficient data access (the path with the least resistance). |
| 4: | What happens during a full-table scan? |
| A4: | A table is read row by row instead of using an index that points to specific rows. |
| 5: | How can you avoid a full-table scan? |
| A5: | A full-table scan can be avoided ... |
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