About physical structure

Today on the data structure, the teacher said that there are four physical structures, sequential structure, chained structure, index and hash, but the book says that there are only sequential and chained structures. So who"s right.


the index you mentioned should also be a sequential structure. As for the hash to calculate another number from one number, that is, the destination address


nouns fly everywhere, what is the "physical structure"? Instead of asking who is right, it is not important to figure out who is right in those four structures.


the order and chain are correct. Other structures are combinations or variants of these two structures.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b334cc-2b1e7.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b334cc-2b1e7.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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