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- Consider a table T in a relational database with a key field K. A B-tree of order p is used as an access structure on K, wherep denotes the maximum number of tree pointers in a B- tree index node. Assume that K is 10 bytes long; disk block size is 512 bytes; each data pointer PD is 8 bytes long and each block pointer Pg is 5 bytes long. In order for each B- tree node to fit in a single disk block, the maximum value of p is_?Suppose a relation is stored in a B+-tree file organization. Suppose secondaryindices store record identifiers that are pointers to records on disk. a. What would be the effect on the secondary indices if a node split happenedin the file organization?b. What would be the cost of updating all affected records in a secondaryindex?c. How does using the search key of the file organization as a logical recordidentifier solve this problem?d. What is the extra cost due to the use of such logical record identifiers?Suppose a relation is stored in a B+-tree file organization. Suppose secondaryindices store record identifiers that are pointers to records on disk. What would be the cost of updating all affected records in a secondary index?
- Suppose a relation is stored in a B+-tree file organization. Suppose secondaryindices store record identifiers that are pointers to records on disk. What would be the effect on the secondary indices if a node split happened in the file organization?Consider a Table T with a key field k. A and B tree of order P denotes the maximum number of record pointers in a B tree. Assume K is 10 bytes long disk block size is 512 Bytes. Record pointer is 8 Bytes and block pointer size is 5 Bytes long in order for each P tree node to fit in a single disk block the maximum value of P.This is done with xampp mysql. Database: theatre(theatre_name[pk], City, Phone, Owner_SSN[pk, fk]) movie(movie_name[pk], Genre, Country) viewer(SSN[pk], Name, Birthyear, Fav_movie[fk], Gender) likes(SSN[pk, fk], movie[pk, fk]) shows(theatre[fk], movies[fk]) owner(SSN[pk], Name, City, Address, Phone) List the movie names showed by at least one theatre and liked by at least one viewer.
- Computer Science Propose a relation schema for storing the access rights associated with user groups in a distributed database catalog, and give a fragmentation scheme for that relation, assuming that all members of a group are at the same site.The statement "using no index at all is probably a better idea then using a tree-based index" is true if: Select one: a. The indexed relation is fairly static O b. The indexed relation is so small it can fit in the main memory buffer c. The statement is incorrect, i.e., it is always beneficial to use an index O d. Alternative (a) is correct only if one assumes no bufferingTo illustrate, imagine you have a database containing the x, y locations and names of several eateries. We shall pretend that just the following kinds of inquiries are made: Whether or if a restaurant can be located at a certain address is the focus of the inquiry. Which indexing system is preferable: B-tree or R-tree? Why?
- Assume one file has r = 10^6 records. Each record takes R = 100 bytes, of which 10 bytes are for the key of record. Suppose the key balues range from 1 to 1,000,000, inclusive. Assume the block size B is 1000 bytes for all files, and that an address (block pointer, tree node poiinter, or data record pointer) takes 10 bytes. What is the total number of blocks required by the B+-tree?A relation has 108 records, taking 10 GB of space. Page size is 10 KB. One page can store 10³ search key-pointer pairs. What is the minimal number of nodes for a B+ tree to index this relation? To receive the full score, write down the number of nodes for each level of the B+ tree. (you can use 1 GB 10³ MB = 106 KB = 109 Byte, and assume that each data entry node can point to 10³ data pages)A B+ tree index is to be built on the Name attribute of the relation STUDENT. Assume that all student names are of length 8 bytes, disk blocks are of size 512 bytes, and index pointers are of size 4 bytes. Given this scenario, what would be the best choice of the degree (i.e. the number of pointers per node) of the B+ - tree?