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Rasi
answered Nov 30 '-1 00:00
indexing means arrange in order so it can be easily access when it need .
in database . all data are stored in disk with other store of meta data . means data have data which have needy to acess of data . suppose size of table etc. example . information_schema table
metadata is have also index which used to identify the data , when server requesting it. so suppose server says i need 35 no of record it means database server look for index - primary key - id which have no 35 . its very simple example.
for complex data structure . as like google use indexing to fetch data very easily .it will make a metadata table which have search word and related that word to search result table primary key . so when i type same search text it will directly find it in metadata table . and show up the result easily .
indexing means pre order it so it can be find easily next time.
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