sequential scan system [计] 顺序扫描系统
Sequential and Volume Scan 逐层扫描与容积扫描
sequential JPEG scan 连续JPEG扫描
Update bills (5 seconds); sequential scan of bills with a nested loop read of bill_items.
更新bills(5秒)；利用对bill_items的循环嵌套读取来顺序扫描。
Update bill_items (58 seconds); sequential scan of bill_items with a nested loop read of customer.
更新bill_items(58秒)；利用对customer的嵌套循环读取，来顺序扫描bill_items。
During the foreign key enforcement, the server USES the sequential scan, instead of foreign key index.
在外键加强过程中，服务器使用顺序扫描，而不是外键索引。
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