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the objectives of this assignment are - to develop skills in the design of database driven applications - to develop skills in applying sql to
a construct a query around any one of the functional divisions you made in 4a such that if executed in the distributed design of 4 would require
show a centralised schema to support the operation of the system you have chosen including in particular the product catalogue the outlets and
consider an information system designed for an online company which provides it products and servicesthese include desktops laptops networking
what is sql structured query language sql is a standard query language it is usually used with all relational databases for data manipulation and
objectivesafter reading this part you should be able to modify create and delete database schema objects update database using sql command retrieve
the structured query languageintroductiondatabase is an organised set of information about an entity having controlled redundancy and serves numerous
importance of file organisation in databaseto execute a database efficiently there are various design tradeoffs needed one of the most vital ones is
multi-list file organisationmulti-list file organisation is a multi-index linked file organisation a linked file organisation is a logical
support by adding indexesmultiple indexes can be used to access a data file by multiple access paths in such a scheme only single copy of the data is
replicating dataone approach that may support efficient access to dissimilar applications as above may be to give access to every of the applications
need for multiple access pathsin practice most of the online information systems need the support of multi-key files for example consider a banking
multi-key file organisationin this part we will introduce two basic file organisation schemes that permit records to be accessed by more than one key
multilevel indexing schemeconsider the indexing scheme where the address of the block is consider in the index for each record for a little file this
sparse and dense indexesthese indexes in principle are the similar as that of indexes used at the back of the book the key facts of the indexes are
distributed query and transaction processinga construct a query around any one of the functional divisions you made in 4a such that if executed
consider an information system designed for an online company which provides it products and services these include desktops laptops networking
what is a databaseat any given time theyre storing a tremendous amount of information - inventory in the case of amazon messages and
for your chosen project you need to identify the current problem that you wish your project to solve produce a problem statement the problem
normal 0 false false false en-us x-none x-none
primary indexa primary index is a file that has a sorted series of records having two columns a block address for that key field in the data file and
types of indexesone of the words used during the file organisation is the term index in this part let us describe this term in more detailwe find the
benefits of hashed file organisation1 insertion or search on hash-key is quick2 best if equality search is
hashed file organisationhashing is the most common form of purely random access to a database or file it is also used to access columns that do not
indexed indexed sequential file organisationit organises the file like a big dictionary ie records are kept in order of the key but an index is