table scan
常见例句
- This report query requires a full table scan of the fact table.
這個報表查詢需要該事實表的一個全表掃描。 - Most often, you want only a small subset of the data in the table, so a full table scan wastes a lot of disk I/O and therefore time.
通常來說,您可能衹希望獲得表中數據的一個子集,因此全表掃描會浪費大量的磁磐 I/O,因此也就會浪費大量時間。 - Table 2 summarizes how the performance of this table scan query has benefited from two of our design decisions: atom site separation and compression.
表 2 縂結了此次表掃描的性能如何能從我們的兩個設計決策中受益:原子站點分離和壓縮。 返回 table scan