Data retrieval and indexing
I have around 800,000 rows of data stored in the boost shared memory from the database. The data are in the form:
Data retrieval and indexing
I have around 800,000 rows of data stored in the boost shared memory from the database. The data are in the form:
Algorithm for indexing strings in “list”
Imagine I have file called strings.dat. Inside this file there are a lot of strings, for example: one million. Strings are sorted. Now I want to find a specified string, so I can write method like this:
Is it premature optimization to add database indices?
A colleague of mine today suggested that we go through all of the queries in our application and to add indices accordingly.
Difficulty in deciding correct data structure
Two objects are interacting (Object Alpha, Object Beta)
Difficulty in deciding correct data structure
Two objects are interacting (Object Alpha, Object Beta)
Difficulty in deciding correct data structure
Two objects are interacting (Object Alpha, Object Beta)
Difficulty in deciding correct data structure
Two objects are interacting (Object Alpha, Object Beta)
Difficulty in deciding correct data structure
Two objects are interacting (Object Alpha, Object Beta)
How come the computer doesn’t have to read the entire table when the column is indexed? [duplicate]
This question already has answers here: Indexing a database (6 answers) Closed 9 years ago. Let’s say a table with two columns has 100 quadrillion records. And I want to find a record that has column #2 equal something. If column #2 is indexed it returns the result immediately, but if it’s not the computer […]