About: Full table scan

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A full table scan (also known as a sequential scan) is a scan made on a database where each row of the table is read in a sequential (serial) order and the columns encountered are checked for the validity of a condition. Full table scans are usually the slowest method of scanning a table due to the heavy amount of I/O reads required from the disk which consists of multiple seeks as well as costly disk to memory transfers.

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  • A full table scan (also known as a sequential scan) is a scan made on a database where each row of the table is read in a sequential (serial) order and the columns encountered are checked for the validity of a condition. Full table scans are usually the slowest method of scanning a table due to the heavy amount of I/O reads required from the disk which consists of multiple seeks as well as costly disk to memory transfers. (en)
  • 全表スキャン (英: full table scan)、または順次スキャン (英: sequential scan)は、データベースで行われるテーブルの読み取り方法であり、テーブルの各行が順次（シリアル）順序で読み取られ、検出された列の条件が必要とされているものかどうかをチェックする。 全表スキャンは通常、複数のシークとディスクからメモリへの転送など、大量の読み取り操作が必要であり、通常とても遅い操作となる。 (ja)
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  • A full table scan (also known as a sequential scan) is a scan made on a database where each row of the table is read in a sequential (serial) order and the columns encountered are checked for the validity of a condition. Full table scans are usually the slowest method of scanning a table due to the heavy amount of I/O reads required from the disk which consists of multiple seeks as well as costly disk to memory transfers. (en)
  • 全表スキャン (英: full table scan)、または順次スキャン (英: sequential scan)は、データベースで行われるテーブルの読み取り方法であり、テーブルの各行が順次（シリアル）順序で読み取られ、検出された列の条件が必要とされているものかどうかをチェックする。 全表スキャンは通常、複数のシークとディスクからメモリへの転送など、大量の読み取り操作が必要であり、通常とても遅い操作となる。 (ja)
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  • Full table scan (en)
  • 全表スキャン (ja)
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