table scan

常見例句

This report query requires a full table scan of the fact table.
這個(gè)報(bào)表查詢需要該事實(shí)表的一個(gè)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(shù)據(jù)的一個(gè)子集，因此全表掃描會(huì)浪費(fèi)大量的磁磐 I/O，因此也就會(huì)浪費(fèi)大量時(shí)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(jié)了此次表掃描的性能如何能從我們的兩個(gè)設(shè)計(jì)決策中受益：原子站點(diǎn)分離和壓縮。